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

Ember.js 是一个用于构建 Web 应用程序的 JavaScript 框架。它基于Model-View-Controller (MVC) 模式，旨在轻松创建复杂的feature-rich Web 应用程序。 Ember.js 提供了一组用于构建 Web 应用程序的工具和约定，有助于管理现代 Web 应用程序的复杂性。

HistoryLocation 是 Ember.js 中的一个类，它提供了一个位置实现，该实现使用浏览器的 history.pushState API 来更改 URL 并使应用程序状态与 URL 保持同步。它与toggleProperty()方法没有直接关系。

HistoryLocation 中的 toggleProperty() 方法用于切换对象的布尔属性。它的工作原理是检查属性的当前值，然后将其设置为相反的值(即，如果为 true，则将其设置为 false，反之亦然)。该方法通常用于切换 Ember.js 应用程序中组件或对象的状态。

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。

安装和运行 Ember.js 的步骤：

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：

Javascript


import Route from '@ember/routing/route'; 
import EmberObject from '@ember/object'; 
  
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'
        }) 
    ]; 
    item2; 
    item3; 
  
    model() { 
        this.set('[]', this.fruits) 
        return this; 
    } 
    setupController(controller, model) { 
        super.setupController(controller, model); 
        controller.set('fruits', this.fruits); 
    } 
}

应用程序/控制器/toggleProperty1.js

Javascript


import Ember from "ember"; 
import { addObject, isAny, isEvery } from "@ember/array"; 
import EmberObject from '@ember/object'; 
  
const Fruit = EmberObject.extend({ 
    init() { 
        alert(`${this.get('name')} is Added in list`); 
    } 
}); 
  
export default Ember.Controller.extend({ 
    actions: { 
        ToggleF() { 
            this.fruits.forEach((item) => 
                item.toggleProperty('isFruit')); 
        }, 
        insertItem(data, data1, data2) { 
            let temp = Fruit.create({ 
                name: data, 
                isFruit: data1, 
                color: data2 
            }); 
            this.fruits.addObject(temp); 
        } 
    }, 
});

应用程序/模板/toggleProperty1.hbs

HTML


{{page-title "toggleProperty"}} 
<h3>Fruit's List :</h3> 
<table> 
    <tr> 
        <th>Name</th> 
        <th>Fruit</th> 
        <th>Color</th> 
    </tr> 
    {{#each this.fruits as |detail|}} 
        <tr> 
            <td>{{detail.name}}</td> 
            <td>{{detail.isFruit}}</td> 
            <td>{{detail.color}}</td> 
        </tr> 
    {{/each}} 
</table> 
<br /><br /> 
<div> 
    <label>Enter Fruit Name: </label> 
    {{input value=this.item1}} 
</div><br /> 
<div> 
    <label>Item is Fruit: </label> 
    {{input value=this.item2}} 
</div><br /> 
<div> 
    <label>Enter Fruit color: </label> 
    {{input value=this.item3}} 
</div><br /> 
<div> 
    <input
        type="button"
        id="insert-item"
        value="Insert Fruit"
        {{action "insertItem" this.item1 this.item2 this.item3}} 
    /> 
</div> 
<br /> 
<div> 
    <input
        type="button"
        id="toggle-item"
        value="Toggle Fruit"
        {{action "ToggleF" this.item4}} 
    /> 
</div> 
{{outlet}}

输出：

切换属性输出1

示例 2：键入以下代码以生成本示例的路由：

ember generate route toggleProperty2

应用程序/路线/toggleProperty2.js

Javascript


import Route from '@ember/routing/route'; 
import Ember from 'ember'; 
import EmberObject from '@ember/object'; 
import EmberResolver from 'ember-resolver'; 
  
export default class PartyRoute extends Route { 
    students = [ 
        EmberObject.create({ 
            Name: 'Balit', 
            skill: 'Python', 
            Id: 'stu2', 
            gender: true
        }), 
        EmberObject.create({ 
            Name: 'Yashu', 
            skill: 'PHP', 
            Id: 'stu0', 
            gender: false
        }), 
        EmberObject.create({ 
            Name: 'Sam', 
            skill: 'R', 
            Id: 'stu1', 
            gender: true
        }), 
        EmberObject.create({ 
            Name: 'Pokhu', 
            skill: 'JavaScript', 
            Id: 'stu3', 
            gender: true
        }), 
        EmberObject.create({ 
            Name: 'Tanu', 
            skill: 'Java', 
            Id: 'stu4', 
            gender: false
        }), 
        EmberObject.create({ 
            Name: 'Arabh', 
            skill: 'c++', 
            Id: 'stu5', 
            gender: true
        })]; 
  
    item3 = 'Gulshan'; 
    item2 = 'Verma'; 
    item1 = 'stu6'; 
    item4 = true; 
    model() { 
        return this.students; 
    } 
    setupController(controller, model) { 
        super.setupController(controller, model); 
        controller.set('students', this.students); 
        controller.set('temp', this.temp); 
        controller.set('item1', this.item1); 
        controller.set('item2', this.item2); 
        controller.set('item3', this.item3); 
        controller.set('item4', this.item4); 
    } 
}

应用程序/控制器/toggleProperty2.js

Javascript


import Controller from '@ember/controller'; 
import { action, find } from '@ember/object'; 
import Ember from 'ember'; 
  
let Student = Ember.Object.extend({ 
    // these will be supplied by `create` 
    Name: null, 
    skill: null, 
    id: null, 
  
    init() { 
        alert(`${this.get('Name')} is Listed`); 
    }, 
    fullName: Ember.computed('firstName', 
        'lastName', function () { 
            return `${this.firstName} ${this.lastName}`; 
        }), 
  
    Changed: Ember.observer('fullName', function () { 
        console.log(`fullName changed to: ${this.fullName}`); 
    }), 
}); 
  
export default class Array2Controller extends Controller { 
  
    @action 
    print(data1, data2, data3, data4) { 
        let temp = Student.create({ 
            Name: data1, 
            skill: data2, 
            Id: data3, 
            gender: data4 
        }); 
        this.students.addObject(temp); 
    } 
    @action 
    toggle() { 
        this.students.forEach((item) => 
            item.toggleProperty('gender')) 
    } 
}

应用程序/模板/toggleProperty2.hbs

HTML


{{page-title "toggleProperty"}} 
<h2> 
    List of Students: 
</h2> 
<table> 
    <tr> 
        <th>Name</th> 
        <th>skill</th> 
        <th>Id</th> 
        <th>Gender</th> 
    </tr> 
    {{#each this.students as |detail|}} 
        <tr> 
            <td>{{detail.Name}}</td> 
            <td>{{detail.skill}}</td> 
            <td>{{get detail "Id"}}</td> 
            <td>{{if detail.gender "Male" "Female"}}</td> 
        </tr> 
    {{/each}} 
</table> 
<br /> 
<div> 
    <label>Enter Student FirstName: </label> 
    {{input value=this.item3}} 
</div> 
<br /> 
<div> 
    <label>Enter Student LastName: </label> 
    {{input value=this.item2}} 
</div> 
<br /> 
<div> 
    <label>Enter Student Id: </label> 
    {{input value=this.item1}} 
</div> 
<br /> 
<div> 
    <label>Enter Student Gender: </label> 
    {{input value=this.item4}} 
</div> 
<br /> 
<input
    type="button"
    id="set-code"
    value="Update Student details"
    {{action "print" this.item3 this.item2 this.item1 this.item4}} 
/> 
<br /> 
<br /> 
<br /> 
<input
    type="button"
    id="toggle-student"
    value="Toggle Gender"
    {{action "toggle"}} 
/>

输出：

切换属性输出2

参考： https://api.emberjs.com/ember/4.8/classes/HistoryLocation/methods/toggleProperty?anchor=toggleProperty

相关用法

注：本文由纯净天空筛选整理自sanbit876大神的英文原创作品 Ember.js HistoryLocation 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。