chore: prettier source code

src/address-edit/Detail.js

@@ -53,7 +53,7 @@ export default createComponent({
     genSearchResult() {
       const { value, shouldShowSearchResult, searchResult } = this;
       if (shouldShowSearchResult) {
-        return searchResult.map(express => (
+        return searchResult.map((express) => (
           <Cell
             key={express.name + express.address}
             clickable

src/address-edit/index.js

@@ -106,7 +106,7 @@ export default createComponent({
         if (province && province === city) {
           arr.splice(1, 1);
         }
-        return arr.filter(text => text).join('/');
+        return arr.filter((text) => text).join('/');
       }
       return '';
     },
@@ -144,9 +144,9 @@ export default createComponent({
     },
 
     onAreaConfirm(values) {
-      values = values.filter(value => !!value);
+      values = values.filter((value) => !!value);
 
-      if (values.some(value => !value.code)) {
+      if (values.some((value) => !value.code)) {
         Toast(t('areaEmpty'));
         return;
       }
@@ -182,7 +182,7 @@ export default createComponent({
         items.push('postalCode');
       }
 
-      const isValid = items.every(item => {
+      const isValid = items.every((item) => {
         const msg = this.getErrorMessage(item);
         if (msg) {
           this.errorInfo[item] = msg;
@@ -260,7 +260,7 @@ export default createComponent({
 
   render() {
     const { data, errorInfo, searchResult, disableArea } = this;
-    const onFocus = name => () => this.onFocus(name);
+    const onFocus = (name) => () => this.onFocus(name);
 
     // hide bottom field when use search && detail get focused
     const hideBottomFields =
@@ -313,7 +313,7 @@ export default createComponent({
             onFocus={onFocus('addressDetail')}
             onBlur={this.onDetailBlur}
             onInput={this.onChangeDetail}
-            onSelect-search={event => {
+            onSelect-search={(event) => {
               this.$emit('select-search', event);
             }}
           />
@@ -337,7 +337,7 @@ export default createComponent({
             vModel={data.isDefault}
             vShow={!hideBottomFields}
             title={t('defaultAddress')}
-            onChange={event => {
+            onChange={(event) => {
               this.$emit('change-default', event);
             }}
           />

src/area/index.js

@@ -14,7 +14,7 @@ function pickSlots(instance, keys) {
   const { $slots, $scopedSlots } = instance;
   const scopedSlots = {};
 
-  keys.forEach(key => {
+  keys.forEach((key) => {
     if ($scopedSlots[key]) {
       scopedSlots[key] = $scopedSlots[key];
     } else if ($slots[key]) {
@@ -111,7 +111,7 @@ export default createComponent({
       }
 
       const list = this[type];
-      result = Object.keys(list).map(listCode => ({
+      result = Object.keys(list).map((listCode) => ({
         code: listCode,
         name: list[listCode],
       }));
@@ -122,7 +122,7 @@ export default createComponent({
           code = '9';
         }
 
-        result = result.filter(item => item.code.indexOf(code) === 0);
+        result = result.filter((item) => item.code.indexOf(code) === 0);
       }
 
       if (this.placeholderMap[type] && result.length) {
@@ -239,7 +239,9 @@ export default createComponent({
 
     getValues() {
       const { picker } = this.$refs;
-      let getValues = picker ? picker.getValues().filter(value => !!value) : [];
+      let getValues = picker
+        ? picker.getValues().filter((value) => !!value)
+        : [];
       getValues = this.parseOutputValues(getValues);
       return getValues;
     },
@@ -258,8 +260,8 @@ export default createComponent({
         return area;
       }
 
-      const names = values.map(item => item.name);
+      const names = values.map((item) => item.name);
-      const validValues = values.filter(value => !!value.code);
+      const validValues = values.filter((value) => !!value.code);
 
       area.code = validValues.length
         ? validValues[validValues.length - 1].code

src/area/test/index.spec.js

@@ -70,17 +70,11 @@ test('change option', () => {
   expect(wrapper).toMatchSnapshot();
 
   triggerDrag(columns.at(0), 0, -100);
-  columns
+  columns.at(0).find('ul').trigger('transitionend');
-    .at(0)
-    .find('ul')
-    .trigger('transitionend');
   expect(wrapper).toMatchSnapshot();
 
   triggerDrag(columns.at(2), 0, -100);
-  columns
+  columns.at(2).find('ul').trigger('transitionend');
-    .at(2)
-    .find('ul')
-    .trigger('transitionend');
   expect(wrapper).toMatchSnapshot();
 
   expect(onChange.mock.calls[0][1]).toEqual(secondOption);

src/calendar/components/Header.js

@@ -30,7 +30,7 @@ export default createComponent({
 
       return (
         <div class={bem('weekdays')}>
-          {weekdays.map(item => (
+          {weekdays.map((item) => (
             <span class={bem('weekday')}>{item}</span>
           ))}
         </div>

src/calendar/components/Month.js

@@ -99,8 +99,8 @@ export default createComponent({
     },
 
     getMultipleDayType(day) {
-      const isSelected = date =>
+      const isSelected = (date) =>
-        this.currentDate.some(item => compareDay(item, date) === 0);
+        this.currentDate.some((item) => compareDay(item, date) === 0);
 
       if (isSelected(day)) {
         const prevDay = getPrevDay(day);

src/calendar/demo/index.vue

@@ -125,7 +125,7 @@ export default {
       youthDay: '青年节',
       calendar: '日历',
       maxRange: '日期区间最大范围',
-      selectCount: count => `选择了 ${count} 个日期`,
+      selectCount: (count) => `选择了 ${count} 个日期`,
       selectSingle: '选择单个日期',
       selectMultiple: '选择多个日期',
       selectRange: '选择日期区间',
@@ -148,7 +148,7 @@ export default {
       youthDay: 'Youth Day',
       calendar: 'Calendar',
       maxRange: 'Max Range',
-      selectCount: count => `${count} dates selected`,
+      selectCount: (count) => `${count} dates selected`,
       selectSingle: 'Select Single Date',
       selectMultiple: 'Select Multiple Date',
       selectRange: 'Select Date Range',

src/calendar/index.js

@@ -219,7 +219,7 @@ export default createComponent({
       const { body, months } = this.$refs;
       const top = getScrollTop(body);
       const bottom = top + this.bodyHeight;
-      const heights = months.map(item => item.height);
+      const heights = months.map((item) => item.height);
       const heightSum = heights.reduce((a, b) => a + b, 0);
 
       // iOS scroll bounce may exceed the range
@@ -412,7 +412,7 @@ export default createComponent({
 
   render() {
     if (this.poppable) {
-      const createListener = name => () => this.$emit(name);
+      const createListener = (name) => () => this.$emit(name);
 
       return (
         <Popup

src/calendar/test/index.spec.js

@@ -33,10 +33,7 @@ test('select event when type is single', async () => {
 
   await later();
 
-  wrapper
+  wrapper.findAll('.van-calendar__day').at(15).trigger('click');
-    .findAll('.van-calendar__day')
-    .at(15)
-    .trigger('click');
 
   expect(formatDate(wrapper.emitted('select')[0][0])).toEqual('2010/1/16');
 });
@@ -112,10 +109,7 @@ test('should not trigger select event when click disabled day', async () => {
 
   await later();
 
-  wrapper
+  wrapper.findAll('.van-calendar__day').at(1).trigger('click');
-    .findAll('.van-calendar__day')
-    .at(1)
-    .trigger('click');
 
   expect(formatDate(wrapper.emitted('select'))).toBeFalsy();
 });
@@ -131,10 +125,7 @@ test('confirm event when type is single', async () => {
 
   await later();
 
-  wrapper
+  wrapper.findAll('.van-calendar__day').at(15).trigger('click');
-    .findAll('.van-calendar__day')
-    .at(15)
-    .trigger('click');
 
   expect(wrapper.emitted('confirm')).toBeFalsy();
 
@@ -446,7 +437,7 @@ test('color prop when type is range', async () => {
   expect(wrapper).toMatchSnapshot();
 });
 
-test('should scroll to current month when show', async done => {
+test('should scroll to current month when show', async (done) => {
   const wrapper = mount(Calendar, {
     propsData: {
       type: 'range',
@@ -456,7 +447,7 @@ test('should scroll to current month when show', async done => {
     },
   });
 
-  Element.prototype.scrollIntoView = function() {
+  Element.prototype.scrollIntoView = function () {
     expect(this.parentNode).toEqual(
       wrapper.findAll('.van-calendar__month').at(3).element
     );

src/calendar/utils.ts

@@ -59,7 +59,7 @@ export function calcDateNum(date: [Date, Date]) {
 
 export function copyDates(dates: Date | Date[]) {
   if (Array.isArray(dates)) {
-    return dates.map(date => {
+    return dates.map((date) => {
       if (date === null) {
         return date;
       }

src/checkbox-group/index.js

@@ -35,10 +35,10 @@ export default createComponent({
 
       let { children } = this;
       if (!checked) {
-        children = children.filter(item => !item.checked);
+        children = children.filter((item) => !item.checked);
       }
 
-      const names = children.map(item => item.name);
+      const names = children.map((item) => item.name);
       this.$emit('input', names);
     },
   },

src/checkbox/test/index.spec.js

@@ -4,7 +4,7 @@ import { mount, later } from '../../../test';
 test('switch checkbox', async () => {
   const wrapper = mount(Checkbox);
 
-  wrapper.vm.$on('input', value => {
+  wrapper.vm.$on('input', (value) => {
     wrapper.setData({ value });
   });
 

src/circle/demo/index.vue

@@ -70,7 +70,7 @@
 </template>
 
 <script>
-const format = rate => Math.min(Math.max(rate, 0), 100);
+const format = (rate) => Math.min(Math.max(rate, 0), 100);
 
 export default {
   i18n: {

src/circle/index.js

@@ -14,8 +14,9 @@ function format(rate) {
 
 function getPath(clockwise, viewBoxSize) {
   const sweepFlag = clockwise ? 1 : 0;
-  return `M ${viewBoxSize / 2} ${viewBoxSize /
+  return `M ${viewBoxSize / 2} ${
-    2} m 0, -500 a 500, 500 0 1, ${sweepFlag} 0, 1000 a 500, 500 0 1, ${sweepFlag} 0, -1000`;
+    viewBoxSize / 2
+  } m 0, -500 a 500, 500 0 1, ${sweepFlag} 0, 1000 a 500, 500 0 1, ${sweepFlag} 0, -1000`;
 }
 
 export default createComponent({

src/collapse-item/index.js

@@ -57,7 +57,7 @@ export default createComponent({
 
       return accordion
         ? value === this.currentName
-        : value.some(name => name === this.currentName);
+        : value.some((name) => name === this.currentName);
     },
   },
 

src/collapse/index.js

@@ -21,7 +21,7 @@ export default createComponent({
       if (!this.accordion) {
         name = expanded
           ? this.value.concat(name)
-          : this.value.filter(activeName => activeName !== name);
+          : this.value.filter((activeName) => activeName !== name);
       }
       this.$emit('change', name);
       this.$emit('input', name);

src/contact-card/demo/index.vue

@@ -84,7 +84,7 @@ export default {
 
     currentContact() {
       const id = this.chosenContactId;
-      return id !== null ? this.list.filter(item => item.id === id)[0] : {};
+      return id !== null ? this.list.filter((item) => item.id === id)[0] : {};
     },
   },
 
@@ -114,7 +114,9 @@ export default {
       this.showList = false;
 
       if (this.isEdit) {
-        this.list = this.list.map(item => (item.id === info.id ? info : item));
+        this.list = this.list.map((item) =>
+          (item.id === info.id ? info : item)
+        );
       } else {
         this.list.push(info);
       }
@@ -123,7 +125,7 @@ export default {
 
     onDelete(info) {
       this.showEdit = false;
-      this.list = this.list.filter(item => item.id !== info.id);
+      this.list = this.list.filter((item) => item.id !== info.id);
       if (this.chosenContactId === info.id) {
         this.chosenContactId = null;
       }

src/contact-edit/index.js

@@ -71,7 +71,7 @@ export default createComponent({
     },
 
     onSave() {
-      const isValid = ['name', 'tel'].every(item => {
+      const isValid = ['name', 'tel'].every((item) => {
         const msg = this.getErrorMessageByKey(item);
         if (msg) {
           this.errorInfo[item] = msg;
@@ -95,7 +95,7 @@ export default createComponent({
 
   render() {
     const { data, errorInfo } = this;
-    const onFocus = name => () => this.onFocus(name);
+    const onFocus = (name) => () => this.onFocus(name);
 
     return (
       <div class={bem()}>
@@ -128,7 +128,7 @@ export default createComponent({
             <Switch
               vModel={data.isDefault}
               size={24}
-              onChange={event => {
+              onChange={(event) => {
                 this.$emit('change-default', event);
               }}
             />

src/contact-list/index.tsx

@@ -61,7 +61,7 @@ function ContactList(
           <Icon
             name="edit"
             class={bem('edit')}
-            onClick={event => {
+            onClick={(event) => {
               event.stopPropagation();
               emit(ctx, 'edit', item, index);
             }}

src/coupon-list/index.js

@@ -181,7 +181,7 @@ export default createComponent({
       </div>
     );
 
-    const onChange = index => () => this.$emit('change', index);
+    const onChange = (index) => () => this.$emit('change', index);
 
     const CouponTab = (
       <Tab title={title}>
@@ -210,7 +210,7 @@ export default createComponent({
           class={bem('list', { 'with-bottom': this.showCloseButton })}
           style={this.listStyle}
         >
-          {disabledCoupons.map(coupon => (
+          {disabledCoupons.map((coupon) => (
             <Coupon
               disabled
               key={coupon.id}

src/coupon-list/test/index.spec.js

@@ -105,10 +105,7 @@ test('render empty coupon list', () => {
       disabledCoupons: [],
     },
   });
-  wrapper
+  wrapper.findAll('.van-tab').at(1).trigger('click');
-    .findAll('.van-tab')
-    .at(1)
-    .trigger('click');
   expect(wrapper).toMatchSnapshot();
 });
 

src/datetime-picker/DatePicker.js

@@ -141,7 +141,7 @@ export default createComponent({
     updateInnerValue() {
       const indexes = this.getPicker().getIndexes();
 
-      const getValue = index => {
+      const getValue = (index) => {
         const { values } = this.originColumns[index];
         return getTrueValue(values[indexes[index]]);
       };

src/datetime-picker/demo/index.vue

@@ -95,7 +95,7 @@ export default {
 
     filter(type, values) {
       if (type === 'minute') {
-        return values.filter(value => value % 5 === 0);
+        return values.filter((value) => value % 5 === 0);
       }
 
       return values;

src/datetime-picker/shared.js

@@ -27,7 +27,7 @@ export const TimePickerMixin = {
   computed: {
     originColumns() {
       return this.ranges.map(({ type, range: rangeArr }) => {
-        let values = times(rangeArr[1] - rangeArr[0] + 1, index => {
+        let values = times(rangeArr[1] - rangeArr[0] + 1, (index) => {
           const value = padZero(rangeArr[0] + index);
           return value;
         });
@@ -44,8 +44,10 @@ export const TimePickerMixin = {
     },
 
     columns() {
-      return this.originColumns.map(column => ({
+      return this.originColumns.map((column) => ({
-        values: column.values.map(value => this.formatter(column.type, value)),
+        values: column.values.map((value) =>
+          this.formatter(column.type, value)
+        ),
       }));
     },
   },
@@ -83,7 +85,7 @@ export const TimePickerMixin = {
 
   render() {
     const props = {};
-    Object.keys(pickerProps).forEach(key => {
+    Object.keys(pickerProps).forEach((key) => {
       props[key] = this[key];
     });
 

src/datetime-picker/test/date-picker.spec.js

@@ -3,7 +3,7 @@ import { mount, later, triggerDrag } from '../../../test';
 
 function filter(type, options) {
   const mod = type === 'year' ? 10 : 5;
-  return options.filter(option => option % mod === 0);
+  return options.filter((option) => option % mod === 0);
 }
 
 function formatter(type, value) {
@@ -128,7 +128,7 @@ test('use min-date with filter', async () => {
       value: new Date(2020, 0, 0, 0, 0),
       filter(type, values) {
         if (type === 'minute') {
-          return values.filter(value => value % 30 === 0);
+          return values.filter((value) => value % 30 === 0);
         }
 
         return values;

src/datetime-picker/test/time-picker.spec.js

@@ -3,7 +3,7 @@ import { mount, later, triggerDrag } from '../../../test';
 
 function filter(type, options) {
   const mod = type === 'minute' ? 10 : 5;
-  return options.filter(option => option % mod === 0);
+  return options.filter((option) => option % mod === 0);
 }
 
 function formatter(type, value) {

src/dialog/Dialog.js

@@ -63,7 +63,7 @@ export default createComponent({
 
       if (this.beforeClose) {
         this.loading[action] = true;
-        this.beforeClose(action, state => {
+        this.beforeClose(action, (state) => {
           if (state !== false && this.loading[action]) {
             this.onClose(action);
           }

src/dialog/index.js

@@ -21,7 +21,7 @@ function initInstance() {
     },
   });
 
-  instance.$on('input', value => {
+  instance.$on('input', (value) => {
     instance.value = value;
   });
 }
@@ -66,14 +66,14 @@ Dialog.defaultOptions = {
   showCancelButton: false,
   closeOnPopstate: false,
   closeOnClickOverlay: false,
-  callback: action => {
+  callback: (action) => {
     instance[action === 'confirm' ? 'resolve' : 'reject'](action);
   },
 };
 
 Dialog.alert = Dialog;
 
-Dialog.confirm = options =>
+Dialog.confirm = (options) =>
   Dialog({
     showCancelButton: true,
     ...options,
@@ -85,7 +85,7 @@ Dialog.close = () => {
   }
 };
 
-Dialog.setDefaultOptions = options => {
+Dialog.setDefaultOptions = (options) => {
   Object.assign(Dialog.currentOptions, options);
 };
 

src/dropdown-item/index.js

@@ -41,7 +41,9 @@ export default createComponent({
         return this.title;
       }
 
-      const match = this.options.filter(option => option.value === this.value);
+      const match = this.options.filter(
+        (option) => option.value === this.value
+      );
       return match.length ? match[0].text : '';
     },
   },
@@ -53,7 +55,7 @@ export default createComponent({
   },
 
   beforeCreate() {
-    const createEmitter = eventName => () => this.$emit(eventName);
+    const createEmitter = (eventName) => () => this.$emit(eventName);
 
     this.onOpen = createEmitter('open');
     this.onClose = createEmitter('close');
@@ -105,7 +107,7 @@ export default createComponent({
       closeOnClickOverlay,
     } = this.parent;
 
-    const Options = this.options.map(option => {
+    const Options = this.options.map((option) => {
       const active = option.value === this.value;
       return (
         <Cell

src/dropdown-menu/index.js

@@ -77,7 +77,7 @@ export default createComponent({
     },
 
     onClickOutside() {
-      this.children.forEach(item => {
+      this.children.forEach((item) => {
         item.toggle(false);
       });
     },

src/dropdown-menu/test/index.spec.js

@@ -213,7 +213,7 @@ test('change event', async () => {
   expect(onChange).toHaveBeenCalledTimes(1);
 });
 
-test('toggle method', async done => {
+test('toggle method', async (done) => {
   const wrapper = mount({
     template: `
       <van-dropdown-menu>

src/field/index.js

@@ -154,7 +154,7 @@ export default createComponent({
     },
 
     runValidator(value, rule) {
-      return new Promise(resolve => {
+      return new Promise((resolve) => {
         const returnVal = rule.validator(value, rule);
 
         if (isPromise(returnVal)) {
@@ -213,7 +213,7 @@ export default createComponent({
             }
 
             if (rule.validator) {
-              return this.runValidator(value, rule).then(result => {
+              return this.runValidator(value, rule).then((result) => {
                 if (result === false) {
                   this.validateMessage = this.getRuleMessage(value, rule);
                 }
@@ -225,7 +225,7 @@ export default createComponent({
     },
 
     validate(rules = this.rules) {
-      return new Promise(resolve => {
+      return new Promise((resolve) => {
         if (!rules) {
           resolve();
         }
@@ -246,7 +246,7 @@ export default createComponent({
     validateWithTrigger(trigger) {
       if (this.vanForm && this.rules) {
         const defaultTrigger = this.vanForm.validateTrigger === trigger;
-        const rules = this.rules.filter(rule => {
+        const rules = this.rules.filter((rule) => {
           if (rule.trigger) {
             return rule.trigger === trigger;
           }

src/field/test/index.spec.js

@@ -267,7 +267,7 @@ test('formatter prop', () => {
   const wrapper = mount(Field, {
     propsData: {
       value: 'abc123',
-      formatter: value => value.replace(/\d/g, ''),
+      formatter: (value) => value.replace(/\d/g, ''),
     },
   });
 
@@ -301,7 +301,7 @@ test('name prop', () => {
   expect(wrapper).toMatchSnapshot();
 });
 
-test('call focus method before mounted', done => {
+test('call focus method before mounted', (done) => {
   mount(Field, {
     created() {
       this.focus();

src/form/demo/FieldTypeArea.vue

@@ -47,7 +47,7 @@ export default {
 
   methods: {
     onConfirm(values) {
-      this.value = values.map(item => item.name).join('/');
+      this.value = values.map((item) => item.name).join('/');
       this.showArea = false;
     },
 

src/form/demo/ValidateRules.vue

@@ -71,7 +71,7 @@ export default {
     },
 
     asyncValidator(val) {
-      return new Promise(resolve => {
+      return new Promise((resolve) => {
         this.$toast.loading(this.t('validating'));
 
         setTimeout(() => {

src/form/index.js

@@ -48,7 +48,7 @@ export default createComponent({
             (promise, field) =>
               promise.then(() => {
                 if (!errors.length) {
-                  return field.validate().then(error => {
+                  return field.validate().then((error) => {
                     if (error) {
                       errors.push(error);
                     }
@@ -69,15 +69,17 @@ export default createComponent({
 
     validateAll() {
       return new Promise((resolve, reject) => {
-        Promise.all(this.fields.map(item => item.validate())).then(errors => {
+        Promise.all(this.fields.map((item) => item.validate())).then(
-          errors = errors.filter(item => item);
+          (errors) => {
+            errors = errors.filter((item) => item);
 
-          if (errors.length) {
+            if (errors.length) {
-            reject(errors);
+              reject(errors);
-          } else {
+            } else {
-            resolve();
+              resolve();
+            }
           }
-        });
+        );
       });
     },
 
@@ -90,11 +92,11 @@ export default createComponent({
     },
 
     validateField(name) {
-      const matched = this.fields.filter(item => item.name === name);
+      const matched = this.fields.filter((item) => item.name === name);
 
       if (matched.length) {
         return new Promise((resolve, reject) => {
-          matched[0].validate().then(error => {
+          matched[0].validate().then((error) => {
             if (error) {
               reject(error);
             } else {
@@ -109,7 +111,7 @@ export default createComponent({
 
     // @exposed-api
     resetValidation(name) {
-      this.fields.forEach(item => {
+      this.fields.forEach((item) => {
         if (!name || item.name === name) {
           item.resetValidation();
         }
@@ -118,7 +120,7 @@ export default createComponent({
 
     // @exposed-api
     scrollToField(name) {
-      this.fields.forEach(item => {
+      this.fields.forEach((item) => {
         if (item.name === name) {
           item.$el.scrollIntoView();
         }
@@ -131,7 +133,7 @@ export default createComponent({
     },
 
     removeField(field) {
-      this.fields = this.fields.filter(item => item !== field);
+      this.fields = this.fields.filter((item) => item !== field);
     },
 
     getValues() {
@@ -154,7 +156,7 @@ export default createComponent({
         .then(() => {
           this.$emit('submit', values);
         })
-        .catch(errors => {
+        .catch((errors) => {
           this.$emit('failed', {
             values,
             errors,

src/form/test/methods.spec.js

@@ -23,10 +23,10 @@ test('submit method', async () => {
   expect(onSubmit).toHaveBeenCalledWith({ A: 'bar' });
 });
 
-test('validate method - validate all fields', done => {
+test('validate method - validate all fields', (done) => {
   mountSimpleRulesForm({
     mounted() {
-      this.$refs.form.validate().catch(err => {
+      this.$refs.form.validate().catch((err) => {
         expect(err).toEqual([
           { message: 'A failed', name: 'A' },
           { message: 'B failed', name: 'B' },
@@ -37,10 +37,10 @@ test('validate method - validate all fields', done => {
   });
 });
 
-test('validate method - validate one field and passed', done => {
+test('validate method - validate one field and passed', (done) => {
   mountSimpleRulesForm({
     mounted() {
-      this.$refs.form.validate('A').catch(err => {
+      this.$refs.form.validate('A').catch((err) => {
         expect(err).toEqual({ message: 'A failed', name: 'A' });
         done();
       });
@@ -48,7 +48,7 @@ test('validate method - validate one field and passed', done => {
   });
 });
 
-test('validate method - validate one field and failed', done => {
+test('validate method - validate one field and failed', (done) => {
   mountForm({
     template: `
       <van-form ref="form" @failed="onFailed">
@@ -64,7 +64,7 @@ test('validate method - validate one field and failed', done => {
   });
 });
 
-test('validate method - unexisted name', done => {
+test('validate method - unexisted name', (done) => {
   mountSimpleRulesForm({
     mounted() {
       this.$refs.form.validate('unexisted').catch(done);
@@ -72,7 +72,7 @@ test('validate method - unexisted name', done => {
   });
 });
 
-test('resetValidation method - reset all fields', done => {
+test('resetValidation method - reset all fields', (done) => {
   const wrapper = mountSimpleRulesForm({
     mounted() {
       this.$refs.form.validate().catch(() => {
@@ -85,7 +85,7 @@ test('resetValidation method - reset all fields', done => {
   });
 });
 
-test('resetValidation method - reset one field', done => {
+test('resetValidation method - reset one field', (done) => {
   const wrapper = mountSimpleRulesForm({
     mounted() {
       this.$refs.form.validate().catch(() => {
@@ -97,7 +97,7 @@ test('resetValidation method - reset one field', done => {
   });
 });
 
-test('scrollToField method', done => {
+test('scrollToField method', (done) => {
   const fn = mockScrollIntoView();
   mountSimpleRulesForm({
     mounted() {

src/form/test/props.spec.js

@@ -14,8 +14,8 @@ test('rules prop - execute order', async () => {
       return {
         rules: [
           { required: true, message: 'A' },
-          { validator: val => val.length > 6, message: 'B' },
+          { validator: (val) => val.length > 6, message: 'B' },
-          { validator: val => val !== 'foo', message: 'C' },
+          { validator: (val) => val !== 'foo', message: 'C' },
         ],
       };
     },
@@ -70,7 +70,7 @@ test('rules prop - message function', async () => {
     `,
     data() {
       return {
-        rules: [{ pattern: /\d{6}/, message: val => val }],
+        rules: [{ pattern: /\d{6}/, message: (val) => val }],
       };
     },
     methods: {
@@ -138,12 +138,12 @@ test('rules prop - async validator', async () => {
             validator: (value, rule) => {
               expect(value).toEqual('123');
               expect(typeof rule).toEqual('object');
-              return new Promise(resolve => resolve(true));
+              return new Promise((resolve) => resolve(true));
             },
             message: 'should pass',
           },
           {
-            validator: () => new Promise(resolve => resolve(false)),
+            validator: () => new Promise((resolve) => resolve(false)),
             message: 'should fail',
           },
         ],

src/image-preview/ImagePreview.js

@@ -102,8 +102,9 @@ export default createComponent({
       };
 
       if (scale !== 1) {
-        style.transform = `scale3d(${scale}, ${scale}, 1) translate(${this
+        style.transform = `scale3d(${scale}, ${scale}, 1) translate(${
-          .moveX / scale}px, ${this.moveY / scale}px)`;
+          this.moveX / scale
+        }px, ${this.moveY / scale}px)`;
       }
 
       return style;

src/image-preview/demo/index.vue

@@ -53,7 +53,7 @@ export default {
       button3: '异步关闭',
       button4: '展示关闭按钮',
       componentCall: '组件调用',
-      index: index => `第${index + 1}页`,
+      index: (index) => `第${index + 1}页`,
     },
     'en-US': {
       button1: 'Show Images',
@@ -61,7 +61,7 @@ export default {
       button3: 'Async Close',
       button4: 'Show Close Icon',
       componentCall: 'Component Call',
-      index: index => `Page: ${index}`,
+      index: (index) => `Page: ${index}`,
     },
   },
 

src/image-preview/index.js

@@ -30,13 +30,13 @@ const initInstance = () => {
   });
   document.body.appendChild(instance.$el);
 
-  instance.$on('change', index => {
+  instance.$on('change', (index) => {
     if (instance.onChange) {
       instance.onChange(index);
     }
   });
 
-  instance.$on('scale', data => {
+  instance.$on('scale', (data) => {
     if (instance.onScale) {
       instance.onScale(data);
     }
@@ -57,7 +57,7 @@ const ImagePreview = (images, startPosition = 0) => {
 
   Object.assign(instance, defaultConfig, options);
 
-  instance.$once('input', show => {
+  instance.$once('input', (show) => {
     instance.value = show;
   });
 

src/image-preview/test/index.spec.js

@@ -103,7 +103,7 @@ test('async close prop', async () => {
   expect(wrapper.emitted('close')[0]).toBeTruthy();
 });
 
-test('function call', done => {
+test('function call', (done) => {
   ImagePreview(images);
   ImagePreview(images.slice(0, 1));
   Vue.nextTick(() => {
@@ -116,7 +116,7 @@ test('function call', done => {
   });
 });
 
-test('double click', async done => {
+test('double click', async (done) => {
   const instance = ImagePreview(images);
 
   await later();
@@ -150,7 +150,7 @@ test('onClose option', () => {
   });
 });
 
-test('onChange option', async done => {
+test('onChange option', async (done) => {
   const instance = ImagePreview({
     images,
     startPostion: 0,
@@ -164,7 +164,7 @@ test('onChange option', async done => {
   triggerDrag(swipe, 1000, 0);
 });
 
-test('onScale option', async done => {
+test('onScale option', async (done) => {
   const { getBoundingClientRect } = Element.prototype;
   Element.prototype.getBoundingClientRect = jest.fn(() => ({ width: 100 }));
 

src/image/test/index.spec.js

@@ -48,7 +48,7 @@ test('lazy load', () => {
   expect(wrapper).toMatchSnapshot();
 });
 
-test('lazy-load load event', done => {
+test('lazy-load load event', (done) => {
   const wrapper = mount(Image, {
     propsData: {
       lazyLoad: true,
@@ -75,7 +75,7 @@ test('lazy-load load event', done => {
   });
 });
 
-test('lazy-load error event', done => {
+test('lazy-load error event', (done) => {
   const wrapper = mount(Image, {
     propsData: {
       lazyLoad: true,

src/index-bar/index.js

@@ -32,7 +32,7 @@ export default createComponent({
   mixins: [
     TouchMixin,
     ParentMixin('vanIndexBar'),
-    BindEventMixin(function(bind) {
+    BindEventMixin(function (bind) {
       if (!this.scroller) {
         this.scroller = getScroller(this.$el);
       }
@@ -97,7 +97,7 @@ export default createComponent({
 
       const scrollTop = getScrollTop(this.scroller);
       const scrollerRect = this.getScrollerRect();
-      const rects = this.children.map(item => ({
+      const rects = this.children.map((item) => ({
         height: item.height,
         top: this.getElementTop(item.$el, scrollerRect),
       }));
@@ -198,7 +198,9 @@ export default createComponent({
         return;
       }
 
-      const match = this.children.filter(item => String(item.index) === index);
+      const match = this.children.filter(
+        (item) => String(item.index) === index
+      );
       if (match[0]) {
         match[0].scrollIntoView();
 
@@ -216,7 +218,7 @@ export default createComponent({
   },
 
   render() {
-    const Indexes = this.indexList.map(index => {
+    const Indexes = this.indexList.map((index) => {
       const active = index === this.activeAnchorIndex;
 
       return (

src/index-bar/test/index.spec.js

@@ -62,7 +62,7 @@ test('touch and scroll to anchor', () => {
   const sidebar = wrapper.find('.van-index-bar__sidebar');
   const indexes = wrapper.findAll('.van-index-bar__index');
 
-  document.elementFromPoint = function(x, y) {
+  document.elementFromPoint = function (x, y) {
     const index = y / 100;
 
     if (index === 1 || index === 2) {
@@ -93,7 +93,7 @@ test('touch and scroll to anchor', () => {
 
 test('scroll and update active anchor', () => {
   const nativeRect = Element.prototype.getBoundingClientRect;
-  Element.prototype.getBoundingClientRect = function() {
+  Element.prototype.getBoundingClientRect = function () {
     const { index } = this.dataset;
     return {
       top: index ? index * 10 : 0,

src/list/index.js

@@ -13,7 +13,7 @@ const [createComponent, bem, t] = createNamespace('list');
 
 export default createComponent({
   mixins: [
-    BindEventMixin(function(bind) {
+    BindEventMixin(function (bind) {
       if (!this.scroller) {
         this.scroller = getScroller(this.$el);
       }

src/list/test/index.spec.js

@@ -4,7 +4,7 @@ import { mount, later, mockGetBoundingClientRect } from '../../../test';
 test('load event', async () => {
   const wrapper = mount(List);
 
-  wrapper.vm.$on('input', value => {
+  wrapper.vm.$on('input', (value) => {
     wrapper.vm.loading = value;
   });
 
@@ -33,7 +33,7 @@ test('error loaded, click error-text and reload', async () => {
   expect(wrapper.emitted('input')).toBeFalsy();
 
   // simulate the behavior of clicking error-text
-  wrapper.vm.$on('update:error', val => {
+  wrapper.vm.$on('update:error', (val) => {
     wrapper.setProps({
       error: val,
     });

src/mixins/close-on-popstate.js

@@ -3,7 +3,7 @@ import { BindEventMixin } from './bind-event';
 
 export const CloseOnPopstateMixin = {
   mixins: [
-    BindEventMixin(function(bind, isBind) {
+    BindEventMixin(function (bind, isBind) {
       this.handlePopstate(isBind && this.closeOnPopstate);
     }),
   ],

src/mixins/popup/overlay.ts

@@ -63,7 +63,7 @@ export function updateOverlay(): void {
 }
 
 export function openOverlay(vm: any, config: OverlayConfig): void {
-  if (!context.stack.some(item => item.vm === vm)) {
+  if (!context.stack.some((item) => item.vm === vm)) {
     context.stack.push({ vm, config });
     updateOverlay();
   }
@@ -77,7 +77,7 @@ export function closeOverlay(vm: any): void {
       stack.pop();
       updateOverlay();
     } else {
-      context.stack = stack.filter(item => item.vm !== vm);
+      context.stack = stack.filter((item) => item.vm !== vm);
     }
   }
 }

src/notice-bar/index.js

@@ -133,7 +133,7 @@ export default createComponent({
         vShow={this.showNoticeBar}
         class={bem({ wrapable: this.wrapable })}
         style={barStyle}
-        onClick={event => {
+        onClick={(event) => {
           this.$emit('click', event);
         }}
       >

src/number-keyboard/index.js

@@ -10,7 +10,7 @@ const DELETE_KEY_THEME = ['delete', 'big', 'gray'];
 
 export default createComponent({
   mixins: [
-    BindEventMixin(function(bind) {
+    BindEventMixin(function (bind) {
       if (this.hideOnClickOutside) {
         bind(document.body, 'touchstart', this.onBlur);
       }
@@ -165,7 +165,7 @@ export default createComponent({
     },
 
     genKeys() {
-      return this.keys.map(key => (
+      return this.keys.map((key) => (
         <Key
           key={key.text}
           text={key.text}

src/number-keyboard/test/index.spec.js

@@ -151,7 +151,7 @@ test('bind value', () => {
       value: '',
     },
     listeners: {
-      'update:value': value => {
+      'update:value': (value) => {
         wrapper.setProps({ value });
       },
     },
@@ -176,7 +176,7 @@ test('maxlength', () => {
     },
     listeners: {
       input: onInput,
-      'update:value': value => {
+      'update:value': (value) => {
         wrapper.setProps({ value });
       },
     },

src/pagination/index.js

@@ -121,7 +121,7 @@ export default createComponent({
     const { value } = this;
     const simple = this.mode !== 'multi';
 
-    const onSelect = value => () => {
+    const onSelect = (value) => () => {
       this.select(value, true);
     };
 
@@ -133,7 +133,7 @@ export default createComponent({
         >
           {this.prevText || t('prev')}
         </li>
-        {this.pages.map(page => (
+        {this.pages.map((page) => (
           <li
             class={[bem('item', { active: page.active }), bem('page'), BORDER]}
             onClick={onSelect(page.number)}

src/picker/index.js

@@ -84,7 +84,7 @@ export default createComponent({
         const defaultIndex = cursor.defaultIndex || +this.defaultIndex;
 
         formatted.push({
-          values: cursor.children.map(item => item[this.valueKey]),
+          values: cursor.children.map((item) => item[this.valueKey]),
           className: cursor.className,
           defaultIndex,
         });
@@ -116,7 +116,7 @@ export default createComponent({
 
         this.setColumnValues(
           columnIndex,
-          cursor.children.map(item => item[this.valueKey])
+          cursor.children.map((item) => item[this.valueKey])
         );
 
         cursor = cursor.children[cursor.defaultIndex || 0];
@@ -205,7 +205,7 @@ export default createComponent({
     // @exposed-api
     // get values of all columns
     getValues() {
-      return this.children.map(child => child.getValue());
+      return this.children.map((child) => child.getValue());
     },
 
     // @exposed-api
@@ -219,7 +219,7 @@ export default createComponent({
     // @exposed-api
     // get indexes of all columns
     getIndexes() {
-      return this.children.map(child => child.currentIndex);
+      return this.children.map((child) => child.currentIndex);
     },
 
     // @exposed-api
@@ -232,7 +232,7 @@ export default createComponent({
 
     // @exposed-api
     confirm() {
-      this.children.forEach(child => child.stopMomentum());
+      this.children.forEach((child) => child.stopMomentum());
       this.emit('confirm');
     },
 

src/picker/test/index.spec.js

@@ -154,7 +154,7 @@ test('simulation finger swipe again before transitionend', () => {
   // mock getComputedStyle
   // see: https://github.com/jsdom/jsdom/issues/2588
   const originGetComputedStyle = window.getComputedStyle;
-  window.getComputedStyle = ele => {
+  window.getComputedStyle = (ele) => {
     const style = originGetComputedStyle(ele);
 
     return {
@@ -188,10 +188,7 @@ test('click column item', () => {
     },
   });
 
-  wrapper
+  wrapper.findAll('.van-picker-column__item').at(3).trigger('click');
-    .findAll('.van-picker-column__item')
-    .at(3)
-    .trigger('click');
   expect(wrapper.emitted('change')[0][1]).toEqual(columns[1]);
 });
 

src/popup/index.js

@@ -36,7 +36,8 @@ export default createComponent({
   },
 
   beforeCreate() {
-    const createEmitter = eventName => event => this.$emit(eventName, event);
+    const createEmitter = (eventName) => (event) =>
+      this.$emit(eventName, event);
 
     this.onClick = createEmitter('click');
     this.onOpened = createEmitter('opened');

src/progress/index.js

@@ -14,7 +14,7 @@ export default createComponent({
     percentage: {
       type: [Number, String],
       required: true,
-      validator: value => value >= 0 && value <= 100,
+      validator: (value) => value >= 0 && value <= 100,
     },
     showPivot: {
       type: Boolean,

src/rate/demo/index.vue

@@ -57,7 +57,7 @@ export default {
       customCount: '自定义数量',
       readonly: '只读状态',
       changeEvent: '监听 change 事件',
-      toastContent: value => `当前值：${value}`,
+      toastContent: (value) => `当前值：${value}`,
     },
     'en-US': {
       halfStar: 'Half Star',
@@ -67,7 +67,7 @@ export default {
       customCount: 'Custom Count',
       readonly: 'Readonly',
       changeEvent: 'Change Event',
-      toastContent: value => `current value：${value}`,
+      toastContent: (value) => `current value：${value}`,
     },
   },
 

src/rate/index.js

@@ -96,7 +96,9 @@ export default createComponent({
 
       this.touchStart(event);
 
-      const rects = this.$refs.items.map(item => item.getBoundingClientRect());
+      const rects = this.$refs.items.map((item) =>
+        item.getBoundingClientRect()
+      );
       const ranges = [];
 
       rects.forEach((rect, index) => {

src/rate/test/index.spec.js

@@ -17,7 +17,7 @@ test('change event', () => {
 
   const wrapper = mount(Rate, {
     listeners: {
-      input: value => {
+      input: (value) => {
         onInput(value);
         wrapper.setProps({ value });
       },

src/sidebar/test/index.spec.js

@@ -37,10 +37,7 @@ test('v-model', () => {
     },
   });
 
-  wrapper
+  wrapper.findAll('.van-sidebar-item').at(1).trigger('click');
-    .findAll('.van-sidebar-item')
-    .at(1)
-    .trigger('click');
   expect(wrapper.vm.active).toEqual(1);
 });
 
@@ -59,10 +56,7 @@ test('disabled prop', () => {
     },
   });
 
-  wrapper
+  wrapper.findAll('.van-sidebar-item').at(1).trigger('click');
-    .findAll('.van-sidebar-item')
-    .at(1)
-    .trigger('click');
   expect(wrapper.vm.active).toEqual(0);
 });
 

src/sku/Sku.js

@@ -171,7 +171,9 @@ export default createComponent({
       }
       // 属性未全选
       if (
-        this.propList.some(it => (this.selectedProp[it.k_id] || []).length < 1)
+        this.propList.some(
+          (it) => (this.selectedProp[it.k_id] || []).length < 1
+        )
       ) {
         return false;
       }
@@ -258,12 +260,12 @@ export default createComponent({
       const imageList = [this.goods.picture];
 
       if (this.skuTree.length > 0) {
-        this.skuTree.forEach(treeItem => {
+        this.skuTree.forEach((treeItem) => {
           if (!treeItem.v) {
             return;
           }
 
-          treeItem.v.forEach(vItem => {
+          treeItem.v.forEach((vItem) => {
             const img = vItem.previewImgUrl || vItem.imgUrl || vItem.img_url;
             if (img) {
               imageList.push(img);
@@ -306,15 +308,17 @@ export default createComponent({
     selectedText() {
       if (this.selectedSkuComb) {
         const values = this.selectedSkuValues.concat(this.selectedPropValues);
-        return `${t('selected')} ${values.map(item => item.name).join('；')}`;
+        return `${t('selected')} ${values.map((item) => item.name).join('；')}`;
       }
 
       const unselectedSku = this.skuTree
-        .filter(item => this.selectedSku[item.k_s] === UNSELECTED_SKU_VALUE_ID)
+        .filter(
-        .map(item => item.k);
+          (item) => this.selectedSku[item.k_s] === UNSELECTED_SKU_VALUE_ID
+        )
+        .map((item) => item.k);
       const unselectedProp = this.propList
-        .filter(item => (this.selectedProp[item.k_id] || []).length < 1)
+        .filter((item) => (this.selectedProp[item.k_id] || []).length < 1)
-        .map(item => item.k);
+        .map((item) => item.k);
 
       return `${t('select')} ${unselectedSku
         .concat(unselectedProp)
@@ -363,13 +367,13 @@ export default createComponent({
       this.selectedSku = {};
 
       // 重置 selectedSku
-      this.skuTree.forEach(item => {
+      this.skuTree.forEach((item) => {
         this.selectedSku[item.k_s] =
           this.initialSku[item.k_s] || UNSELECTED_SKU_VALUE_ID;
       });
 
       // 只有一个 sku 规格值时默认选中
-      this.skuTree.forEach(item => {
+      this.skuTree.forEach((item) => {
         const key = item.k_s;
         const valueId = item.v[0].id;
         if (
@@ -396,7 +400,7 @@ export default createComponent({
       this.selectedProp = {};
       const { selectedProp = {} } = this.initialSku;
       // 只有一个属性值时，默认选中，且选中外部传入信息
-      this.propList.forEach(item => {
+      this.propList.forEach((item) => {
         if (item.v && item.v.length === 1) {
           this.selectedProp[item.k_id] = [item.v[0].id];
         } else if (selectedProp[item.k_id]) {
@@ -493,7 +497,7 @@ export default createComponent({
     onPreviewImage(indexImage) {
       const { previewOnClickImage } = this;
 
-      const index = this.imageList.findIndex(image => image === indexImage);
+      const index = this.imageList.findIndex((image) => image === indexImage);
 
       const params = {
         index,
@@ -615,7 +619,7 @@ export default createComponent({
       selectedSku,
       selectedSkuComb,
     };
-    const slots = name => this.slots(name, slotsProps);
+    const slots = (name) => this.slots(name, slotsProps);
 
     const Header = slots('sku-header') || (
       <SkuHeader
@@ -658,9 +662,9 @@ export default createComponent({
       slots('sku-group') ||
       (this.hasSkuOrAttr && (
         <div class={this.skuGroupClass}>
-          {this.skuTree.map(skuTreeItem => (
+          {this.skuTree.map((skuTreeItem) => (
             <SkuRow skuRow={skuTreeItem}>
-              {skuTreeItem.v.map(skuValue => (
+              {skuTreeItem.v.map((skuValue) => (
                 <SkuRowItem
                   skuList={sku.list}
                   skuValue={skuValue}
@@ -671,9 +675,9 @@ export default createComponent({
               ))}
             </SkuRow>
           ))}
-          {this.propList.map(skuTreeItem => (
+          {this.propList.map((skuTreeItem) => (
             <SkuRow skuRow={skuTreeItem}>
-              {skuTreeItem.v.map(skuValue => (
+              {skuTreeItem.v.map((skuValue) => (
                 <SkuRowPropItem
                   skuValue={skuValue}
                   skuKeyStr={skuTreeItem.k_id + ''}
@@ -701,7 +705,7 @@ export default createComponent({
         disableStepperInput={this.disableStepperInput}
         customStepperConfig={this.customStepperConfig}
         hideQuotaText={this.hideQuotaText}
-        onChange={event => {
+        onChange={(event) => {
           this.$emit('stepper-change', event);
         }}
       />

src/sku/components/SkuHeader.tsx

@@ -27,11 +27,12 @@ function getSkuImg(
 ): string | undefined {
   let img;
 
-  sku.tree.some(item => {
+  sku.tree.some((item) => {
     const id = selectedSku[item.k_s];
 
     if (id && item.v) {
-      const matchedSku = item.v.filter(skuValue => skuValue.id === id)[0] || {};
+      const matchedSku =
+        item.v.filter((skuValue) => skuValue.id === id)[0] || {};
       img = matchedSku.previewImgUrl || matchedSku.imgUrl || matchedSku.img_url;
       return img;
     }

src/sku/components/SkuImgUploader.js

@@ -32,7 +32,7 @@ export default createComponent({
       this.paddingImg = file.content;
       this.uploadFail = false;
       this.uploadImg(file.file, file.content)
-        .then(img => {
+        .then((img) => {
           this.$emit('input', img);
           this.$nextTick(() => {
             this.paddingImg = '';

src/sku/components/SkuMessages.js

@@ -37,7 +37,7 @@ export default createComponent({
     resetMessageValues(messages) {
       const { messageConfig } = this;
       const { initialMessages = {} } = messageConfig;
-      return (messages || []).map(message => ({
+      return (messages || []).map((message) => ({
         value: initialMessages[message.name] || '',
       }));
     },

src/sku/demo/index.vue

@@ -180,8 +180,8 @@ export default {
       customSkuValidator: () => '请选择xxx',
       customStepperConfig: {
         quotaText: '单次限购100件',
-        stockFormatter: stock => `剩余${stock}件`,
+        stockFormatter: (stock) => `剩余${stock}件`,
-        handleOverLimit: data => {
+        handleOverLimit: (data) => {
           const { action, limitType, quota, startSaleNum = 1 } = data;
 
           if (action === 'minus') {
@@ -202,7 +202,7 @@ export default {
           留言1: '商品留言',
         },
         uploadImg: (file, img) =>
-          new Promise(resolve => {
+          new Promise((resolve) => {
             setTimeout(() => resolve(img), 1000);
           }),
         uploadMaxSize: 3,

src/sku/utils/sku-helper.js

@@ -34,19 +34,19 @@ import { UNSELECTED_SKU_VALUE_ID } from '../constants';
     ...
   }
  */
-export const normalizeSkuTree = skuTree => {
+export const normalizeSkuTree = (skuTree) => {
   const normalizedTree = {};
-  skuTree.forEach(treeItem => {
+  skuTree.forEach((treeItem) => {
     normalizedTree[treeItem.k_s] = treeItem.v;
   });
   return normalizedTree;
 };
 
-export const normalizePropList = propList => {
+export const normalizePropList = (propList) => {
   const normalizedProp = {};
-  propList.forEach(item => {
+  propList.forEach((item) => {
     const itemObj = {};
-    item.v.forEach(it => {
+    item.v.forEach((it) => {
       itemObj[it.id] = it;
     });
     normalizedProp[item.k_id] = itemObj;
@@ -58,16 +58,16 @@ export const normalizePropList = propList => {
 export const isAllSelected = (skuTree, selectedSku) => {
   // 筛选selectedSku对象中key值不为空的值
   const selected = Object.keys(selectedSku).filter(
-    skuKeyStr => selectedSku[skuKeyStr] !== UNSELECTED_SKU_VALUE_ID
+    (skuKeyStr) => selectedSku[skuKeyStr] !== UNSELECTED_SKU_VALUE_ID
   );
   return skuTree.length === selected.length;
 };
 
 // 根据已选择的 sku 获取 skuComb
 export const getSkuComb = (skuList, selectedSku) => {
-  const skuComb = skuList.filter(item =>
+  const skuComb = skuList.filter((item) =>
     Object.keys(selectedSku).every(
-      skuKeyStr => String(item[skuKeyStr]) === String(selectedSku[skuKeyStr])
+      (skuKeyStr) => String(item[skuKeyStr]) === String(selectedSku[skuKeyStr])
     )
   );
   return skuComb[0];
@@ -81,7 +81,7 @@ export const getSelectedSkuValues = (skuTree, selectedSku) => {
     const skuValueId = selectedSku[skuKeyStr];
 
     if (skuValueId !== UNSELECTED_SKU_VALUE_ID) {
-      const skuValue = skuValues.filter(value => value.id === skuValueId)[0];
+      const skuValue = skuValues.filter((value) => value.id === skuValueId)[0];
       skuValue && selectedValues.push(skuValue);
     }
     return selectedValues;
@@ -100,12 +100,12 @@ export const isSkuChoosable = (skuList, selectedSku, skuToChoose) => {
 
   // 再判断剩余sku是否全部不可选，若不可选则当前sku不可选中
   const skusToCheck = Object.keys(matchedSku).filter(
-    skuKey => matchedSku[skuKey] !== UNSELECTED_SKU_VALUE_ID
+    (skuKey) => matchedSku[skuKey] !== UNSELECTED_SKU_VALUE_ID
   );
 
-  const filteredSku = skuList.filter(sku =>
+  const filteredSku = skuList.filter((sku) =>
     skusToCheck.every(
-      skuKey => String(matchedSku[skuKey]) === String(sku[skuKey])
+      (skuKey) => String(matchedSku[skuKey]) === String(sku[skuKey])
     )
   );
 
@@ -119,7 +119,7 @@ export const isSkuChoosable = (skuList, selectedSku, skuToChoose) => {
 export const getSelectedPropValues = (propList, selectedProp) => {
   const normalizeProp = normalizePropList(propList);
   return Object.keys(selectedProp).reduce((acc, cur) => {
-    selectedProp[cur].forEach(it => {
+    selectedProp[cur].forEach((it) => {
       acc.push({
         ...normalizeProp[cur][it],
       });
@@ -130,10 +130,10 @@ export const getSelectedPropValues = (propList, selectedProp) => {
 
 export const getSelectedProperties = (propList, selectedProp) => {
   const list = [];
-  (propList || []).forEach(prop => {
+  (propList || []).forEach((prop) => {
     if (selectedProp[prop.k_id] && selectedProp[prop.k_id].length > 0) {
       const v = [];
-      prop.v.forEach(it => {
+      prop.v.forEach((it) => {
         if (selectedProp[prop.k_id].indexOf(it.id) > -1) {
           v.push({ ...it });
         }

src/slider/test/index.spec.js

@@ -25,7 +25,7 @@ test('drag button', () => {
     },
   });
 
-  wrapper.vm.$on('input', value => {
+  wrapper.vm.$on('input', (value) => {
     wrapper.setProps({ value });
   });
 
@@ -56,7 +56,7 @@ test('click bar', () => {
     },
   });
 
-  wrapper.vm.$on('input', value => {
+  wrapper.vm.$on('input', (value) => {
     wrapper.setProps({ value });
   });
 
@@ -80,7 +80,7 @@ test('drag button vertical', () => {
     },
   });
 
-  wrapper.vm.$on('input', value => {
+  wrapper.vm.$on('input', (value) => {
     wrapper.setProps({ value });
   });
 
@@ -101,7 +101,7 @@ test('click vertical', () => {
     },
   });
 
-  wrapper.vm.$on('input', value => {
+  wrapper.vm.$on('input', (value) => {
     wrapper.setProps({ value });
   });
 
@@ -151,7 +151,7 @@ test('should not emit change event when value not changed', () => {
   expect(wrapper.emitted('change').length).toEqual(1);
 });
 
-test('should format initial value', done => {
+test('should format initial value', (done) => {
   mount(Slider, {
     propsData: {
       value: null,

src/stepper/index.js

@@ -261,7 +261,7 @@ export default createComponent({
   },
 
   render() {
-    const createListeners = type => ({
+    const createListeners = (type) => ({
       on: {
         click: () => {
           this.type = type;

src/stepper/test/index.spec.js

@@ -172,7 +172,7 @@ test('stepper blur', () => {
     },
   });
 
-  wrapper.vm.$on('input', value => {
+  wrapper.vm.$on('input', (value) => {
     wrapper.setProps({ value });
   });
 

src/steps/test/index.spec.js

@@ -43,10 +43,7 @@ test('click-step event', () => {
   wrapper.find('.van-step__title').trigger('click');
   expect(onClickStep).toHaveBeenCalledWith(0);
 
-  wrapper
+  wrapper.findAll('.van-step__circle-container').at(2).trigger('click');
-    .findAll('.van-step__circle-container')
-    .at(2)
-    .trigger('click');
   expect(onClickStep).toHaveBeenCalledTimes(2);
   expect(onClickStep).toHaveBeenLastCalledWith(2);
 });

src/sticky/index.js

@@ -7,7 +7,7 @@ const [createComponent, bem] = createNamespace('sticky');
 
 export default createComponent({
   mixins: [
-    BindEventMixin(function(bind, isBind) {
+    BindEventMixin(function (bind, isBind) {
       if (!this.scroller) {
         this.scroller = getScroller(this.$el);
       }
@@ -67,7 +67,7 @@ export default createComponent({
     // compatibility: https://caniuse.com/#feat=intersectionobserver
     if (!isServer && window.IntersectionObserver) {
       this.observer = new IntersectionObserver(
-        entries => {
+        (entries) => {
           // trigger scroll when visibility changed
           if (entries[0].intersectionRatio > 0) {
             this.onScroll();

src/swipe-cell/index.js

@@ -186,7 +186,7 @@ export default createComponent({
     },
 
     getClickHandler(position, stop) {
-      return event => {
+      return (event) => {
         if (stop) {
           event.stopPropagation();
         }

src/swipe-cell/test/index.spec.js

@@ -115,7 +115,7 @@ test('before-close prop', () => {
   expect(wrapper.vm.offset).toEqual(0);
 });
 
-test('name prop', done => {
+test('name prop', (done) => {
   const wrapper = mount(SwipeCell, {
     ...defaultProps,
     propsData: {

src/swipe/index.js

@@ -16,7 +16,7 @@ export default createComponent({
   mixins: [
     TouchMixin,
     ParentMixin('vanSwipe'),
-    BindEventMixin(function(bind, isBind) {
+    BindEventMixin(function (bind, isBind) {
       bind(window, 'resize', this.resize, true);
       bind(window, 'visibilitychange', this.onVisibilityChange);
 
@@ -175,7 +175,7 @@ export default createComponent({
       this.swiping = true;
       this.active = active;
       this.offset = this.getTargetOffset(active);
-      this.children.forEach(swipe => {
+      this.children.forEach((swipe) => {
         swipe.offset = 0;
       });
       this.autoPlay();

src/tabbar/test/index.spec.js

@@ -75,7 +75,7 @@ test('route mode match by name', async () => {
   expect(wrapper).toMatchSnapshot();
 });
 
-test('router NavigationDuplicated', async done => {
+test('router NavigationDuplicated', async (done) => {
   expect(async () => {
     const router = new VueRouter();
     const wrapper = mount({
@@ -157,10 +157,7 @@ test('name prop', () => {
     },
   });
 
-  wrapper
+  wrapper.findAll('.van-tabbar-item').at(1).trigger('click');
-    .findAll('.van-tabbar-item')
-    .at(1)
-    .trigger('click');
 
   expect(onChange).toHaveBeenCalledWith('b');
 });

src/tabs/index.js

@@ -27,7 +27,7 @@ const [createComponent, bem] = createNamespace('tabs');
 export default createComponent({
   mixins: [
     ParentMixin('vanTabs'),
-    BindEventMixin(function(bind) {
+    BindEventMixin(function (bind) {
       if (!this.scroller) {
         this.scroller = getScroller(this.$el);
       }
@@ -231,7 +231,7 @@ export default createComponent({
 
     // correct the index of active tab
     setCurrentIndexByName(name) {
-      const matched = this.children.filter(tab => tab.computedName === name);
+      const matched = this.children.filter((tab) => tab.computedName === name);
       const defaultIndex = (this.children[0] || {}).index || 0;
       this.setCurrentIndex(matched.length ? matched[0].index : defaultIndex);
     },

src/toast/demo/index.vue

@@ -69,7 +69,7 @@ export default {
       text3: '失败文案',
       customIcon: '自定义图标',
       customImage: '展示图片',
-      text4: second => `倒计时 ${second} 秒`,
+      text4: (second) => `倒计时 ${second} 秒`,
       longTextButton: '长文字提示',
       updateMessage: '动态更新提示',
       loadingType: '自定义加载图标',
@@ -87,7 +87,7 @@ export default {
       text3: 'Fail',
       customIcon: 'Custom Icon',
       customImage: 'Custom Image',
-      text4: second => `${second} seconds`,
+      text4: (second) => `${second} seconds`,
       longTextButton: 'Long Text',
       updateMessage: 'Update Message',
       loadingType: 'Loading Type',

src/toast/index.js

@@ -54,7 +54,7 @@ function createInstance() {
       el: document.createElement('div'),
     });
 
-    toast.$on('input', value => {
+    toast.$on('input', (value) => {
       toast.value = value;
     });
 
@@ -99,7 +99,7 @@ function Toast(options = {}) {
     if (multiple && !isServer) {
       toast.$on('closed', () => {
         clearTimeout(toast.timer);
-        queue = queue.filter(item => item !== toast);
+        queue = queue.filter((item) => item !== toast);
 
         removeNode(toast.$el);
         toast.$destroy();
@@ -119,20 +119,20 @@ function Toast(options = {}) {
   return toast;
 }
 
-const createMethod = type => options =>
+const createMethod = (type) => (options) =>
   Toast({
     type,
     ...parseOptions(options),
   });
 
-['loading', 'success', 'fail'].forEach(method => {
+['loading', 'success', 'fail'].forEach((method) => {
   Toast[method] = createMethod(method);
 });
 
-Toast.clear = all => {
+Toast.clear = (all) => {
   if (queue.length) {
     if (all) {
-      queue.forEach(toast => {
+      queue.forEach((toast) => {
         toast.clear();
       });
       queue = [];
@@ -152,7 +152,7 @@ Toast.setDefaultOptions = (type, options) => {
   }
 };
 
-Toast.resetDefaultOptions = type => {
+Toast.resetDefaultOptions = (type) => {
   if (typeof type === 'string') {
     defaultOptionsMap[type] = null;
   } else {

src/tree-select/index.tsx

@@ -61,7 +61,7 @@ function TreeSelect(
       : activeId === id;
   }
 
-  const Navs = items.map(item => (
+  const Navs = items.map((item) => (
     <SidebarItem
       dot={item.dot}
       info={isDef(item.badge) ? item.badge : item.info}
@@ -76,7 +76,7 @@ function TreeSelect(
       return slots.content();
     }
 
-    return subItems.map(item => (
+    return subItems.map((item) => (
       <div
         key={item.id}
         class={[

src/tree-select/test/index.spec.js

@@ -293,7 +293,7 @@ test('className of nav', () => {
   expect(items.at(0).element.classList.contains('my-class')).toBeTruthy();
 });
 
-test('should sync value before trigger click-item event', done => {
+test('should sync value before trigger click-item event', (done) => {
   const wrapper = mount({
     template: `
       <van-tree-select

src/uploader/index.js

@@ -117,7 +117,7 @@ export default createComponent({
 
         if (isPromise(response)) {
           response
-            .then(data => {
+            .then((data) => {
               if (data) {
                 this.readFile(data);
               } else {
@@ -143,8 +143,8 @@ export default createComponent({
           files = files.slice(0, maxCount);
         }
 
-        Promise.all(files.map(file => readFile(file, this.resultType))).then(
+        Promise.all(files.map((file) => readFile(file, this.resultType))).then(
-          contents => {
+          (contents) => {
             const fileList = files.map((file, index) => {
               const result = { file, status: '' };
 
@@ -159,7 +159,7 @@ export default createComponent({
           }
         );
       } else {
-        readFile(files, this.resultType).then(content => {
+        readFile(files, this.resultType).then((content) => {
           const result = { file: files, status: '' };
 
           if (content) {
@@ -227,8 +227,8 @@ export default createComponent({
         return;
       }
 
-      const imageFiles = this.fileList.filter(item => isImageFile(item));
+      const imageFiles = this.fileList.filter((item) => isImageFile(item));
-      const imageContents = imageFiles.map(item => item.content || item.url);
+      const imageContents = imageFiles.map((item) => item.content || item.url);
 
       this.imagePreview = ImagePreview({
         images: imageContents,
@@ -287,7 +287,7 @@ export default createComponent({
         <Icon
           name="clear"
           class={bem('preview-delete')}
-          onClick={event => {
+          onClick={(event) => {
             event.stopPropagation();
             this.onDelete(item, index);
           }}

src/uploader/test/index.spec.js

@@ -1,7 +1,7 @@
 import Uploader from '..';
 import { mount, later, triggerDrag } from '../../../test';
 
-window.File = function() {
+window.File = function () {
   this.size = 10000;
 };
 
@@ -12,8 +12,8 @@ const multiFile = { target: { files: [mockFile, mockFile] } };
 const IMAGE = 'https://img.yzcdn.cn/vant/cat.jpeg';
 const PDF = 'https://img.yzcdn.cn/vant/test.pdf';
 
-window.FileReader = function() {
+window.FileReader = function () {
-  this.readAsText = function() {
+  this.readAsText = function () {
     this.onload &&
       this.onload({
         target: {
@@ -37,11 +37,11 @@ test('disabled', () => {
   expect(afterRead).toHaveBeenCalledTimes(0);
 });
 
-test('result-type as text', done => {
+test('result-type as text', (done) => {
   const wrapper = mount(Uploader, {
     propsData: {
       resultType: 'text',
-      afterRead: readFile => {
+      afterRead: (readFile) => {
         expect(readFile.content).toEqual(mockFileDataUrl);
         done();
       },
@@ -51,11 +51,11 @@ test('result-type as text', done => {
   wrapper.vm.onChange(file);
 });
 
-test('result-type as file', done => {
+test('result-type as file', (done) => {
   const wrapper = mount(Uploader, {
     propsData: {
       resultType: 'file',
-      afterRead: readFile => {
+      afterRead: (readFile) => {
         expect(readFile.file).toBeTruthy();
         expect(readFile.content).toBeFalsy();
         done();
@@ -66,7 +66,7 @@ test('result-type as file', done => {
   wrapper.vm.onChange(file);
 });
 
-test('set input name', done => {
+test('set input name', (done) => {
   const wrapper = mount(Uploader, {
     propsData: {
       name: 'uploader',
@@ -117,7 +117,7 @@ test('before read return promise and resolve', async () => {
   const wrapper = mount(Uploader, {
     propsData: {
       beforeRead: () =>
-        new Promise(resolve => {
+        new Promise((resolve) => {
           resolve(file);
         }),
       afterRead,
@@ -135,7 +135,7 @@ test('before read return promise and resolve no value', async () => {
   const wrapper = mount(Uploader, {
     propsData: {
       beforeRead: () =>
-        new Promise(resolve => {
+        new Promise((resolve) => {
           resolve();
         }),
       afterRead,
@@ -360,7 +360,7 @@ test('before-delete prop resolved', async () => {
   const wrapper = mount(Uploader, {
     propsData: {
       fileList: [{ url: IMAGE }],
-      beforeDelete: () => new Promise(resolve => resolve()),
+      beforeDelete: () => new Promise((resolve) => resolve()),
     },
   });
 

src/uploader/utils.ts

@@ -9,7 +9,7 @@ export function toArray<T>(item: T | T[]): T[] {
 }
 
 export function readFile(file: File, resultType: ResultType) {
-  return new Promise(resolve => {
+  return new Promise((resolve) => {
     if (resultType === 'file') {
       resolve();
       return;
@@ -17,7 +17,7 @@ export function readFile(file: File, resultType: ResultType) {
 
     const reader = new FileReader();
 
-    reader.onload = event => {
+    reader.onload = (event) => {
       resolve((event.target as FileReader).result);
     };
 
@@ -33,7 +33,7 @@ export function isOversize(
   files: File | File[],
   maxSize: number | string
 ): boolean {
-  return toArray(files).some(file => file.size > maxSize);
+  return toArray(files).some((file) => file.size > maxSize);
 }
 
 export type FileListItem = {

src/utils/create/bem.ts

@@ -30,7 +30,7 @@ function gen(name: string, mods?: Mods): string {
 }
 
 export function createBEM(name: string) {
-  return function(el?: Mods, mods?: Mods): Mods {
+  return function (el?: Mods, mods?: Mods): Mods {
     if (el && typeof el !== 'string') {
       mods = el;
       el = '';

src/utils/create/component.ts

@@ -43,7 +43,7 @@ export function unifySlots(context: RenderContext) {
   const scopedSlots = context.scopedSlots || context.data.scopedSlots || {};
   const slots = context.slots();
 
-  Object.keys(slots).forEach(key => {
+  Object.keys(slots).forEach((key) => {
     if (!scopedSlots[key]) {
       scopedSlots[key] = () => slots[key];
     }
@@ -66,7 +66,7 @@ function transformFunctionComponent(
 }
 
 export function createComponent(name: string) {
-  return function<Props = DefaultProps, Events = {}, Slots = {}>(
+  return function <Props = DefaultProps, Events = {}, Slots = {}>(
     sfc: VantComponentOptions | FunctionComponent
   ): TsxComponent<Props, Events, Slots> {
     if (isFunction(sfc)) {

src/utils/create/i18n.ts

@@ -5,7 +5,7 @@ import locale from '../../locale';
 export function createI18N(name: string) {
   const prefix = camelize(name) + '.';
 
-  return function(path: string, ...args: any[]): string {
+  return function (path: string, ...args: any[]): string {
     const messages = locale.messages();
     const message = get(messages, prefix + path) || get(messages, path);
 

src/utils/deep-assign.ts

@@ -19,7 +19,7 @@ function assignKey(to: ObjectIndex, from: ObjectIndex, key: string) {
 }
 
 export function deepAssign(to: ObjectIndex, from: ObjectIndex): ObjectIndex {
-  Object.keys(from).forEach(key => {
+  Object.keys(from).forEach((key) => {
     assignKey(to, from, key);
   });
 

src/utils/deep-clone.ts

@@ -2,7 +2,7 @@ import { deepAssign } from './deep-assign';
 
 export function deepClone(obj: object): object {
   if (Array.isArray(obj)) {
-    return obj.map(item => deepClone(item));
+    return obj.map((item) => deepClone(item));
   }
 
   if (typeof obj === 'object') {

src/utils/functional.ts

@@ -43,7 +43,7 @@ export function emit(context: Context, eventName: string, ...args: any[]) {
   const listeners = context.listeners[eventName];
   if (listeners) {
     if (Array.isArray(listeners)) {
-      listeners.forEach(listener => {
+      listeners.forEach((listener) => {
         listener(...args);
       });
     } else {

src/utils/index.ts

@@ -27,7 +27,7 @@ export function get(object: any, path: string): any {
   const keys = path.split('.');
   let result = object;
 
-  keys.forEach(key => {
+  keys.forEach((key) => {
     result = isDef(result[key]) ? result[key] : '';
   });
 

src/utils/router.ts

@@ -18,7 +18,7 @@ export function route(router: VueRouter, config: RouteConfig) {
 
     /* istanbul ignore else */
     if (promise && promise.catch) {
-      promise.catch(err => {
+      promise.catch((err) => {
         /* istanbul ignore if */
         if (err && err.name !== 'NavigationDuplicated') {
           throw err;

src/utils/vnodes.ts

@@ -5,7 +5,7 @@ function flattenVNodes(vnodes: VNode[]) {
   const result: VNode[] = [];
 
   function traverse(vnodes: VNode[]) {
-    vnodes.forEach(vnode => {
+    vnodes.forEach((vnode) => {
       result.push(vnode);
 
       if (vnode.children) {