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Embeer.js ArrayProxy toggleProperty()用法及代码示例


Ember.js 是一个开源 JavaScript 框架，用于开发基于 Model-View-Controller (MVC) 架构的大型客户端 Web 应用程序。 Ember.js是使用最广泛的前端应用框架之一。它的目的是加速开发并提高生产力。目前，它被大量网站使用，包括 Square、Discourse、Groupon、Linked In、Live Nation、Twitch 和 Chipotle。

toggleProperty() 方法用于将布尔属性的值设置为其当前值的相反值。

用法:

toggleProperty( keyName );

参数：

  • keyName:它是要切换的属性的名称。

返回值：新的属性值。

第 1 步：要运行以下示例，您需要有一个 ember 项目。要创建一个，您需要先安装ember-cli。在终端中写入以下代码：

npm install ember-cli

第 2 步：现在您可以通过输入以下代码来创建项目：

ember new <project-name> --lang en

要启动服务器，请键入：

ember serve

示例 1：键入以下代码以生成本示例的路由：

ember generate route toggleProperty1

应用程序/路线/toggleProperty1.js

Javascript


import Route from '@ember/routing/route';
import EmberObject from '@ember/object';
export default class WebsitesRoute extends Route {
    food = [
        EmberObject.create({
            food: 'apple',
            isFruit: true,
            buck: '1',
        }),
        EmberObject.create({
            food: 'Potato',
            isFruit: false,
            buck: '2',
        }),
        EmberObject.create({
            food: 'Banana',
            isFruit: true,
            buck: '1',
        }),
        EmberObject.create({
            food: 'Burgur',
            isFruit: false,
            buck: '2',
        }),
        EmberObject.create({
            food: 'Orange',
            isFruit: true,
            buck: '1',
        }),
    ];
    food2 = [
        EmberObject.create({ food: 'sandwitch', 
            isFruit: false, buck: '2', }),
        EmberObject.create({ food: 'bean', 
            isFruit: false, buck: '2', }),
        EmberObject.create({ name: 'Banana', 
            isFruit: true, buck: 1 }),
        EmberObject.create({ name: 'Water-melon', 
            isFruit: true, buck: 2 }),
        EmberObject.create({ name: 'Papaya', 
            isFruit: true, buck: 1 }),
        ,
        ,
    ];
    temp;
    model() {
        return this.food;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('food', this.food);
        controller.set('temp', this.temp);
        controller.set('food2', this.food2);
    }
}

应用程序/控制器/toggleProperty1.js

Javascript


import Ember from 'ember';
export default Ember.Controller.extend({
    value: 0,
    actions: {
        List() {
            let ans = '';
            this.food.forEach((item) => ans += 
            item.getProperties('food').food + ' is in Bucket ' + 
            item.getProperties('buck').buck + '\n');
            alert(ans);
        },
        Bucket2() {
            this.food.forEach((item, i) => 
                item.setProperties(this.food2.at(i)));
        },
        toggle2() {
            this.food.forEach((item, i) => 
                item.toggleProperty('isFruit'));
        },
    },
});

应用程序/模板/toggleProperty1.hbs

Javascript


{{page-title "toggleProperty"}}
<h3>List of Item in Buckets</h3>
<table>
    <tr>
        <th> Food Name </th>
        <th>Bucket </th>
        <th>Fruit </th>
      </tr>
      {{#each @model as |website|}}
    <tr>
        <td>{{website.food}}</td>
          <td>{{website.buck}}</td>
          <td>{{website.isFruit}}</td>
    </tr>
      {{/each}}
</table>
<br /><br />
<input
    type="button"
      id="increase"
      value="List All items with Bucket number"
      {{action "List"}}
/>
<br /><br />
<input
    type="button"
      id="update-list"
      value="List another Bucket item"
      {{action "Bucket2"}}
/>
<br /><br />
<input
    type="button"
      id="toggle-property"
      value="Toggle Fruit Property"
      {{action "toggle2"}}
/>
{{outlet}}

输出：访问 localhost:4200/toggleProperty1 查看输出。

Ember.js ArrayProxy toggleProperty() 方法

示例 2：键入以下代码以生成本示例的路线。

ember generate route toggleProperty2

应用程序/路线/toggleProperty2.js

Javascript


import Route from '@ember/routing/route';
import EmberObject from '@ember/object';
import { } from '@ember/array';
export default class FruitsRoute extends Route {
    fruits = [
        EmberObject.create({ name: 'Lady Finger', 
            isFruit: false, color: 'green' }),
        EmberObject.create({ name: 'Brinjal', 
            isFruit: false, color: 'purple' }),
        EmberObject.create({ name: 'Apple', 
            isFruit: true, color: 'red' }),
        EmberObject.create({ name: 'Grapes', 
            isFruit: true, color: 'green' }),
        EmberObject.create({ name: 'Mango', 
            isFruit: true, color: 'yellow' }),
        EmberObject.create({ name: 'Watermelon', 
            isFruit: true, color: 'red' }),
        EmberObject.create({ name: 'Orange', 
            isFruit: true, color: 'orange' })
    ];
    fruits2 = [
        EmberObject.create({ name: 'Potato', 
            isFruit: false, color: 'brown' }),
        EmberObject.create({ name: 'Tomato', 
            isFruit: false, color: 'red' }),
        EmberObject.create({ name: 'Banana', 
            isFruit: true, color: 'Yellow' }),
        EmberObject.create({ name: 'Water-melon', 
            isFruit: true, color: 'green' }),
        EmberObject.create({ name: 'Papaya', 
            isFruit: true, color: 'yellow' }),
    ];
    model() {
        return this.fruits;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('fruits', this.fruits);
        controller.set('fruits2', this.fruits2);
    }
}

应用程序/控制器/toggleProperty2.js

Javascript


import Ember from "ember";
import { isAny, isEvery } from "@ember/array";
export default Ember.Controller.extend({
    actions: {
        print() {
            let ans = '';
            this.fruits.forEach((item) => ans += 
            item.setProperties('name').name + '\n');
            alert(ans);
        },
        Change() {
            let ans = this.fruits.forEach((item, i) => 
                item.setProperties(this.fruits2.at(i)));
        },
        toggle() {
            this.fruits.forEach((item) => 
                item.toggleProperty('isFruit'));
        },
    },
});

应用程序/模板/toggleProperty2.hbs

Javascript


{{page-title "toggleProperty"}}
<h3>Here is a list of eatables: </h3>
<br/><table>
    <tr>
        <th>Name</th>
        <th>isFruit</th>
        <th>color</th>
    </tr>
    {{#each @model as |detail|}}
    <tr>
        <td>{{detail.name}}</td>
        <td>{{detail.isFruit}}</td>
        <td>{{detail.color}}</td>
    </tr>
    {{/each}}
</table>
<br/>
<input type="button"
    id="list-item"
    value="List all Items"
    {{action 'print'}}/>
<br/><br/>
<input type="button"
    id="change-item"
    value="Change all Item in Bucket"
    {{action 'Change'}}/>
<br/><br/>
<input type="button"
    id="toggle-isFruits"
    value="Toggle isFruit Properties"
    {{action 'toggle'}}/>
{{outlet}}

输出：访问 localhost:4200/toggleProperty2 查看输出。

Ember.js ArrayProxy toggleProperty() 方法

参考： https://api.emberjs.com/ember/4.4/classes/ArrayProxy/methods/toggleProperty?anchor=toggleProperty



相关用法


注：本文由纯净天空筛选整理自jeemains0neet大神的英文原创作品 Ember.js ArrayProxy toggleProperty() Method。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。