【发布时间】：2018-07-08 21:26:15
【问题描述】：
一个 jQuery 日期选择器被包装在一个 Vue 组件中。该组件发出一条更新消息，用于更新应用模型。
该应用有两个日期选择器输入字段：
startDateadjustmentDate
当startDate 被修改时，adjustmentDate 将被更新到下一个月初或十五号。但是，adjustmentDate datepicker 组件没有收到更新通知。
预期行为：
startDatedatepickeronSelect触发Vue组件emit被Vue方法updateStartDate捕获方法
updateStartDate设置模型属性adjustmentDate
希望这会触发adjustmentDate 组件更新，因为adjustmentDate 模型属性绑定到具有手表的日期选择器componentDate 属性。
但是更改模型并没有通知组件的效果。
任何建议如何正确执行此操作并在更改startDate 时显示新计算的adjustmentDate？
演示代码：
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<link rel="stylesheet" href="http://code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<script src="https://unpkg.com/vue"></script>
<script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.min.js"></script>
</head>
<body>
<div id="app">
<div><label>Start date</label></div>
<div>
<date-picker
v-model="startDate"
v-bind:component-date="startDate"
date-format="yy-mm-dd"
@update-date="updateStartDate"
v-once
></date-picker>
</div>
<div><label>Adjustment date</label></div>
<div>
<date-picker
v-model="adjustmentDate"
v-bind:component-date="adjustmentDate"
date-format="yy-mm-dd"
@update-date="updateAdjustmentDate"
v-once
></date-picker>
</div>
</div>
<script>
Vue.component('date-picker', {
props: ['dateFormat', 'componentDate'],
template: '<input/>',
mounted: function() {
var self = this;
var _convertDateStringToDate = function(dateString) {
var dateParts = dateString.split("-");
var year = dateParts[0];
var month = dateParts[1];
var dayOfMonth = dateParts[2];
return new Date(year, month, dayOfMonth);
};
$(this.$el).datepicker({
dateFormat: this.dateFormat,
onSelect: function(date) {
self.$emit('update-date', _convertDateStringToDate(date));
},
onClose: function(date) {
self.$emit('update-date', _convertDateStringToDate(date));
}
});
$(this.$el).datepicker('setDate', this.componentDate);
},
watch: {
componentDate: function(newValue, oldValue) {
$(this.$el).datepicker('setDate', this.componentDate);
}
},
beforeDestroy: function() {
$(this.$el).datepicker('hide').datepicker('destroy');
}
});
var _calculateAdjustmentDate = function(date) {
var year = date.getFullYear();
var month = date.getMonth();
var dayOfMonth = date.getDate();
if (dayOfMonth > 15) {
month = month + 1;
dayOfMonth = 1;
} else if (dayOfMonth > 1 && dayOfMonth < 15) {
dayOfMonth = 15;
}
return new Date(year, month, dayOfMonth);
};
var data = function() {
var now = new Date();
return {
startDate: now,
adjustmentDate: _calculateAdjustmentDate(now),
};
};
new Vue({
el: '#app',
data: data,
methods: {
updateStartDate: function(date) {
this.startDate = date;
this.adjustmentDate = _calculateAdjustmentDate(date);
},
updateAdjustmentDate: function(date) {
this.adjustmentDate = date;
},
}
});
</script>
</body>
</html>
【问题讨论】：
标签： datepicker vuejs2 vue-component