vant/packages/sku/components/SkuStepper.vue

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<template>
<div class="van-sku-stepper-stock">
<div class="van-sku-stepper-container">
<div class="van-sku__stepper-title">{{ stepperTitle || $t('title') }}</div>
<stepper
class="van-sku__stepper"
v-model="currentNum"
:min="1"
:max="stepperLimit"
:disable-input="disableStepperInput"
@overlimit="handleOverLimit"
/>
</div>
<div v-if="!hideStock" class="van-sku__stock">{{ $t('remain', stock) }}</div>
<div v-if="quota > 0" class="van-sku__quota">{{ $t('quota', quota) }}</div>
</div>
</template>
<script>
import { create } from '../../utils';
import Stepper from '../../stepper';
import { LIMIT_TYPE } from '../constants';
const { QUOTA_LIMIT, STOCK_LIMIT } = LIMIT_TYPE;
export default create({
name: 'van-sku-stepper',
components: {
Stepper
},
props: {
skuEventBus: Object,
skuStockNum: Number,
selectedSku: Object,
selectedSkuComb: Object,
selectedNum: Number,
stepperTitle: String,
quota: Number,
quotaUsed: Number,
hideStock: {
type: Boolean,
default: false
},
disableStepperInput: {
type: Boolean,
default: false
}
},
data() {
return {
currentNum: this.selectedNum,
// 购买限制类型: 限购/库存
limitType: STOCK_LIMIT
};
},
watch: {
currentNum(num) {
this.skuEventBus.$emit('sku:numChange', num);
},
stepperLimit(limit) {
if (limit < this.currentNum) {
this.currentNum = limit;
}
}
},
computed: {
stock() {
if (this.selectedSkuComb) {
return this.selectedSkuComb.stock_num;
}
return this.skuStockNum;
},
stepperLimit() {
const quotaLimit = this.quota - this.quotaUsed;
let limit;
// 无限购时直接取库存,有限购时取限购数和库存数中小的那个
if (this.quota > 0 && quotaLimit <= this.stock) {
// 修正负的limit
limit = quotaLimit < 0 ? 0 : quotaLimit;
this.limitType = QUOTA_LIMIT;
} else {
limit = this.stock;
this.limitType = STOCK_LIMIT;
}
return limit;
}
},
methods: {
setCurrentNum(num) {
this.currentNum = num;
},
handleOverLimit(action) {
this.skuEventBus.$emit('sku:overLimit', {
action,
limitType: this.limitType,
quota: this.quota,
quotaUsed: this.quotaUsed
});
}
}
});
</script>