Question

我正在尝试在Aurelia进行双向绑定，但我似乎无法使其正常工作。

所以我的create.html有selectedTimeZone.two-way="timeZone"。我试图通过<div if.bind="timeZone">Main: ${timeZone}</div>来显示它正在工作和绑定的事实。但这永远不会奏效，价值timeZone永远不会受到约束。

在time-zone-picker.html它似乎确实在那里工作。我<div if.bind="selectedTimeZone">This is working! ->${selectedTimeZone}</div>正常工作。

示例

主要模板（ create.html ）：

<template>
    <require from="../shared/components/time-zone-picker"></require>
    <time-zone-picker selectedTimeZone.two-way="timeZone"></time-zone-picker>
    <div if.bind="timeZone">Main: ${timeZone}</div>
</template>

时区-picker.html ：

<template bindable="selectedTimeZone">
    <select class="c-select" value.bind="selectedTimeZone">
        <option>Select A Time Zone</option>
        <option repeat.for="tz of timezones" model.bind="tz">${tz.text}</option>
     </select>
     <div if.bind="selectedTimeZone">This is working! ->${selectedTimeZone}</div>
</template>

时区-picker.js：

import Timezones from 'timezones.json';

export class TimeZonePicker {
  constructor() {
    this.timezones = Timezones;
  }
}

修改

添加以下代码以匹配以下回复。仍然无法使用以下更改：

时区-picker.js

import { bindable, bindingMode } from 'aurelia-framework';
import Timezones from 'timezones.json';

export class TimeZonePicker {
  @bindable({ defaultBindingMode: bindingMode.twoWay }) selectedTimeZone;
  constructor() {
    this.timezones = Timezones;
  }
}

时区-picker.html

<template>
  <select class="c-select" value.bind="selectedTimeZone">
    <option>Select A Time Zone</option>
    <option repeat.for="tz of timezones" model.bind="tz">${tz.text}</option>
  </select>
  <div if.bind="selectedTimeZone">${selectedTimeZone}</div>
</template>

create.html上

<template>
    <require from="../shared/components/time-zone-picker"></require>
    <time-zone-picker selectedTimezone.two-way="timeZone"></time-zone-picker>
    <div if.bind="timeZone">MAIN ${timeZone}</div>
</template>

Answer 1

您应该仅将<template bindable="...">用于仅限html的自定义元素。在你的情况下，你应该这样做：

<强>时区-picker.html

<template> <-- remove bindable here -->
    <select class="c-select" value.bind="selectedTimeZone">
        <option>Select A Time Zone</option>
        <option repeat.for="tz of timezones" model.bind="tz">${tz.text}</option>
     </select>
     <div if.bind="selectedTimeZone">This is working! ->${selectedTimeZone}</div>
</template>

<强>时区-picker.js：

import {bindable} from 'aurelia-templating'; // or framework
import {bindingMode} from 'aurelia-binding'; // or framework
import Timezones from 'timezones.json';

export class TimeZonePicker {

  @bindable({ defaultBindingMode: bindingMode.twoWay }) selectedTimeZone;
  constructor() {
    this.timezones = Timezones;
  }
}

<强> create.html上

<template>
    <require from="../shared/components/time-zone-picker"></require>
    <time-zone-picker selected-time-zone.two-way="timeZone"></time-zone-picker>
    <div if.bind="timeZone">Main: ${timeZone}</div>
</template>

Aurelia双向绑定无法正常工作

1 个答案: