Ember.js ArrayProxy的incrementProperty()方法

Ember.js 是一个开源的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是最广泛使用的前端应用程序框架之一。它旨在加快开发速度并提高生产力。目前，它被许多网站使用，包括Square、Discourse、Groupon、Linked In、Live Nation、Twitch和Chipotle。

incrementProperty()方法 用于将属性的值设置为当前值加上一定数量。

语法：

incrementProperty( keyName, increment );

参数：

keyName（键名）： 这是要递增的属性的名称。
increment（递增量）： 这是属性要递增的值。

返回值： 新的属性值。

安装和运行Ember.js的步骤：

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

npm install ember-cli

现在你可以通过键入以下代码来创建项目：

ember new <project-name> --lang en

要启动服务器，请输入：

ember serve

示例1

输入以下代码以生成此示例的路由：

ember generate route increment1

app/controllers/increment1.js

import Ember from 'ember'; 
import { incrementProperty } 
    from '@ember/array'; 
  
export default Ember.Controller.extend({ 
    year: 2022, 
    month: 9, 
    date: 15, 
    actions: { 
        olderD() { 
            this.incrementProperty('date'); 
        }, 
        youngerD() { 
            this.decrementProperty('date'); 
        }, 
        olderY() { 
            this.incrementProperty('year'); 
        }, 
        youngerY() { 
            this.decrementProperty('year'); 
        }, 
        olderM() { 
            this.incrementProperty('month'); 
        }, 
        youngerM() { 
            this.decrementProperty('month'); 
        }, 
    }, 
});

app/templates/increment1.hbs

{{page-title "Details"}} 
<h1>Year {{this.year}}</h1> 
<input type="button" id="increase"
    value="+" {{action 'olderY'}}/> 
<input type="button" id="decrease"
    value="-" {{action 'youngerY'}}/> 
<hr/> 
<h1>Month {{this.month}}</h1> 
<input type="button" id="increase"
    value="+" {{action 'olderM'}}/> 
<input type="button" id="decrease"
    value="-" {{action 'youngerM'}}/> 
<hr/> 
<h1>Date {{this.date}}</h1> 
<input type="button" id="increaseD"
    value="+" {{action 'olderD'}}/> 
<input type="button" id="decrease"
    value="-" {{action 'youngerD'}}/> 
{{outlet}}

输出: 访问 localhost:4200/increment1 查看输出

Ember.js ArrayProxy的incrementProperty()方法

示例2

输入以下代码以生成路线

为本示例：

ember generate route increment2

app/routes/increment2.js

import Route from '@ember/routing/route'; 
  
export default class WebsitesRoute extends Route { 
    food = [ 
        { 
            food: 'apple', 
            isFruit: true, 
            quant: '1', 
        }, 
        { 
            food: 'Potato', 
            isFruit: false, 
            quant: '2', 
        }, 
        { 
            food: 'Banana', 
            isFruit: true, 
            quant: '1', 
        }, 
        { 
            food: 'Burgur', 
            isFruit: false, 
            quant: '2', 
        }, 
        { 
            food: 'Orange', 
            isFruit: true, 
            quant: '1', 
        }, 
        { 
            food: 'sandwitch', 
            isFruit: false, 
            quant: '2', 
        }, 
        { 
            food: 'bean', 
            isFruit: false, 
            quant: '2', 
        }, 
    ]; 
    temp; 
    model() { 
        return this.food; 
    } 
    setupController(controller, model) { 
        super.setupController(controller, model); 
        controller.set('food', this.food); 
        controller.set('temp', this.temp); 
        controller.set('temp2', this.temp2); 
    } 
}

app/controllers/increment2.js

import Ember from 'ember'; 
  
export default Ember.Controller.extend({ 
    value: 0, 
    actions: { 
        older() { 
            this.incrementProperty('value'); 
        }, 
        younger() { 
            this.decrementProperty('value'); 
        }, 
  
        addItem(data, data1, data2) { 
            let temp = {  
                food: data,  
                quant: data1,  
                isFruit: data2  
            } 
            this.food.addObject(temp) 
        }, 
    }, 
});

app/templates/increment2.hbs

{{page-title "increaseProperty"}} 
<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.quant}}</td> 
        <td>{{website.isFruit}}</td> 
    </tr> 
    {{/each}} 
</table> 
<br /><br /> 
  
<div> 
    <label>Enter Item Name: </label> 
    {{input value=this.temp2}} 
</div> 
<br /> 
  
<div> 
    <label>Enter Quantity in Kg: </label> 
    {{input value=this.value}} 
</div> 
<input type="button" id="increase"
    value="+" {{action 'older'}}/> 
<input type="button" id="decrease"
    value="-" {{action 'younger'}}/> 
<br/> 
<br /> 
  
<div> 
    <label>Item is fruit of not : </label> 
    {{input value=this.temp}} 
</div> 
<br /><br /> 
<input type="button" id="all-Fruits"
    value="Add item"
    {{action 'addItem' this.temp2 this.value this.temp}} /> 
{{outlet}}

输出： 访问 localhost:4200/inc2 查看输出

Ember.js ArrayProxy的incrementProperty()方法