[Improvement] Dialog: add before-close prop (#881)

docs/demos/views/dialog.vue

@@ -13,7 +13,8 @@
       <van-button @click="show = true">{{ $t('advancedUsage') }}</van-button>
       <van-dialog
         v-model="show"
-        :asyncConfirm="onClickConfirmAsync"
+        show-cancel-button
+        :before-close="beforeClose"
       >
         <van-field
           v-model="username"
@@ -59,7 +60,7 @@ export default {
       Dialog.alert({
         title: this.$t('title'),
         message: this.$t('content')
-      })
+      });
     },
 
     onClickAlert2() {
@@ -75,12 +76,12 @@ export default {
       });
     },
 
-    onClickConfirmAsync() {
-      return new Promise((resolve, reject) => {
-        setTimeout(() => {
-          resolve()
-        }, 1000)
-      })
+    beforeClose(action, done) {
+      if (action === 'confirm') {
+        setTimeout(done, 1000);
+      } else {
+        done();
+      }
     }
   }
 };

docs/markdown/en-US/dialog.md

@@ -77,6 +77,7 @@ export default {
 | overlay | Whether to show overlay | `Boolean` | `true` | - |
 | closeOnClickOverlay | Whether to close when click overlay | `Boolean` | `false` | - |
 | lockScroll | Whether to lock body scroll | `Boolean` | `true` | - |
+| beforeClose | Callback before close，call done to close dialog | (action: string, done: function) => void | - | - |
 
 #### Advanced Usage
 If you need to render vue components within a dialog, you can use dialog component.
@@ -110,12 +111,12 @@ export default {
   },
   
   methods: {
-    onClickConfirmAsync() {
-      return new Promise((resolve, reject) => {
-        setTimeout(() => {
-          resolve()
-        }, 1000)
-      })
+    beforeClose() {
+      if (action === 'confirm') {
+        setTimeout(done, 1000);
+      } else {
+        done();
+      }
     }
   }
 }
@@ -136,6 +137,7 @@ export default {
 | overlay | Whether to show overlay | `Boolean` | `true` | - |
 | close-on-click-overlay | Whether to close when click overlay | `Boolean` | `false` | - |
 | lock-scroll | Whether to lock background scroll | `Boolean` | `true` | - |
+| before-close | Callback before close，call done to close dialog | (action: string, done: function) => void | - | - |
 
 ### Event
 

docs/markdown/zh-CN/dialog.md

@@ -78,13 +78,18 @@ export default {
 | overlay | 是否展示蒙层 | `Boolean` | `true` | - |
 | closeOnClickOverlay | 点击蒙层时是否关闭弹窗 | `Boolean` | `false` | - |
 | lockScroll | 是否锁定背景滚动 | `Boolean` | `true` | - |
+| beforeClose | 关闭前的回调函数，调用 done 后关闭弹窗 | (action: string, done: function) => void | - | - |
 
 
 #### 高级用法
 如果需要在弹窗内实现更复杂的交互，可以通过组件形式来调用 Dialog
 
 ```html
-<van-dialog v-model="show" :asyncConfirm="onClickConfirmAsync">
+<van-dialog
+  v-model="show"
+  show-cancel-button
+  :before-close="beforeClose"
+>
   <van-field
     v-model="username"
     label="用户名"
@@ -112,12 +117,12 @@ export default {
   },
   
   methods: {
-    onClickConfirmAsync() {
-      return new Promise((resolve, reject) => {
-        setTimeout(() => {
-          resolve();
-        }, 1000)
-      });
+    beforeClose() {
+      if (action === 'confirm') {
+        setTimeout(done, 1000);
+      } else {
+        done();
+      }
     }
   }
 }
@@ -130,7 +135,6 @@ export default {
 | v-model | 是否显示弹窗 | `Boolean` | - | - |
 | title | 标题 | `String` | - | - |
 | message | 内容 | `String` | - | - |
-| async-confirm | dialog是否异步关闭，传入一个返回Promise的函数，在点击确定时触发。 | `Function` | - | - |
 | show-confirm-button | 是否展示确认按钮 | `Boolean` |  `true` | - |
 | show-cancel-button | 是否展示取消按钮 | `Boolean` |  `false` | - |
 | confirm-button-text | 确认按钮的文案 | `String` |  `确认` | - |
@@ -138,6 +142,7 @@ export default {
 | overlay | 是否展示蒙层 | `Boolean` | `true` | - |
 | close-on-click-overlay | 点击蒙层时是否关闭弹窗 | `Boolean` | `false` | - |
 | lock-scroll | 是否锁定背景滚动 | `Boolean` | `true` | - |
+| before-close | 关闭前的回调函数，调用 done 后关闭弹窗 | (action: string, done: function) => void | - | - |
 
 ### Event
 

packages/dialog/dialog.vue

@@ -9,19 +9,20 @@
       </div>
       <div class="van-dialog__footer" :class="{ 'is-twobtn': showCancelButton && showConfirmButton }">
         <van-button
+          v-show="showCancelButton"
+          :loading="loading.cancel"
           size="large"
           class="van-dialog__cancel"
-          v-show="showCancelButton"
           @click="handleAction('cancel')"
         >
           {{ cancelButtonText || $t('cancel') }}
         </van-button>
         <van-button
-          size="large"
-          class="van-dialog__confirm"
-          :loading="confirmButtonLoading"
-          :class="{ 'van-hairline--left': showCancelButton && showConfirmButton }"
           v-show="showConfirmButton"
+          size="large"
+          :loading="loading.confirm"
+          class="van-dialog__confirm"
+          :class="{ 'van-hairline--left': showCancelButton && showConfirmButton }"
           @click="handleAction('confirm')"
         >
           {{ confirmButtonText || $t('confirm') }}
@@ -39,18 +40,6 @@ import Popup from '../mixins/popup';
 export default create({
   name: 'dialog',
 
-  data() {
-    return {
-      confirmButtonLoading: false
-    };
-  },
-
-  watch: {
-    value(val) {
-      this.confirmButtonLoading = !val && false;
-    }
-  },
-
   components: {
     VanButton
   },
@@ -61,7 +50,7 @@ export default create({
     title: String,
     message: String,
     callback: Function,
-    asyncConfirm: Function,
+    beforeClose: Function,
     confirmButtonText: String,
     cancelButtonText: String,
     showCancelButton: Boolean,
@@ -79,19 +68,31 @@ export default create({
     }
   },
 
+  data() {
+    return {
+      loading: {
+        confirm: false,
+        cancel: false
+      }
+    };
+  },
+
   methods: {
     handleAction(action) {
-      if ((action === 'confirm') && this.asyncConfirm) {
-        this.confirmButtonLoading = true;
-        this.asyncConfirm(action).then(res => {
-          this.$emit('input', false);
-        }).catch(err => {
-          this.confirmButtonLoading = false;
+      if (this.beforeClose) {
+        this.loading[action] = true;
+        this.beforeClose(action, () => {
+          this.onClose(action);
+          this.loading[action] = false;
         });
       } else {
-        this.$emit('input', false);
-        this.$emit(action);
+        this.onClose(action);
       }
+    },
+
+    onClose(action) {
+      this.$emit('input', false);
+      this.$emit(action);
       this.callback && this.callback(action);
     }
   }

packages/dialog/index.js

@@ -35,6 +35,7 @@ Dialog.defaultOptions = {
   message: '',
   overlay: true,
   lockScroll: true,
+  beforeClose: null,
   confirmButtonText: '',
   cancelButtonText: '',
   showConfirmButton: true,

test/specs/dialog.spec.js

@@ -7,6 +7,7 @@ describe('Dialog', () => {
   });
 
   it('create a alert dialog', (done) => {
+    Dialog.close();
     Dialog.alert({
       title: 'title',
       message: 'message'
@@ -19,7 +20,7 @@ describe('Dialog', () => {
       expect(document.querySelector('.van-dialog')).to.exist;
       expect(document.querySelector('.van-dialog__cancel').style.display).to.equal('none');
       document.querySelector('.van-dialog__confirm').click();
-    }, 500);
+    }, 300);
   });
 
   it('create a confirm dialog', (done) => {
@@ -35,7 +36,7 @@ describe('Dialog', () => {
 
     setTimeout(() => {
       document.querySelector('.van-dialog__cancel').click();
-    }, 500);
+    }, 300);
   });
 
   it('create a confirm dialog with callback', (done) => {
@@ -48,7 +49,7 @@ describe('Dialog', () => {
 
     setTimeout(() => {
       document.querySelector('.van-dialog__cancel').click();
-    }, 500);
+    }, 300);
   });
 
   it('set default options', () => {
@@ -64,4 +65,23 @@ describe('Dialog', () => {
     Vue.use(Dialog);
     expect(!!Vue.component('van-dialog')).to.be.true;
   });
+
+  it('before close', (done) => {
+    Dialog.confirm({
+      beforeClose(action, dialogDone) {
+        setTimeout(() => {
+          dialogDone();
+          setTimeout(() => {
+            expect(document.querySelector('.van-dialog').style.display).to.equal('none');
+            done();
+          }, 300);
+        });
+      }
+    });
+
+    setTimeout(() => {
+      document.querySelector('.van-dialog__confirm').click();
+      expect(document.querySelector('.van-dialog').style.display).to.equal('');
+    }, 300);
+  });
 });

types/dialog.d.ts

@@ -3,6 +3,7 @@ export type DialogOptions = {
   message?: string;
   overlay?: boolean;
   lockScroll?: boolean;
+  beforeClose?: (action: string, done: function) => void;
   confirmButtonText?: string;
   cancelButtonText?: string;
   showConfirmButton?: boolean;