Embeer.js EmberRouter incrementProperty()用法及代碼示例

Ember.js 是一個開源 JavaScript 框架，用於開發基於 Model-View-Controller (MVC) 架構的大型客戶端 Web 應用程序。 Ember.js是使用最廣泛的前端應用框架之一。它的目的是加速開發並提高生產力。目前，它被大量網站使用，包括 Square、Discourse、Groupon、Linked In、Live Nation、Twitch 和 Chipotle。

EmberRouter 的incrementProperty() 方法是用於增加 Ember 對象的屬性值的方法。

句法：

this.object.incrementProperty( PropertyName, decrement );

參數：

PropertyName: 這是我們要減少的屬性的名稱。
decrement: 它是值將減少的值。

返回：新的屬性值。

安裝和運行 Ember.js 的步驟：

第 1 步：要運行以下示例，您需要有一個 ember 項目。要創建一個，您需要先安裝ember-cli。在終端中寫入以下代碼：

npm install ember-cli

第 2 步：現在您可以通過輸入以下代碼來創建項目：

ember new <project-name> --lang en

要啟動服務器，請鍵入：

ember serve

示例 1：鍵入以下代碼以生成本示例的路由：

ember generate route test1

應用程序/路線/test1.js

Javascript


import Route from '@ember/routing/route'; 
import EmberObject from '@ember/object'; 
import Ember from 'ember'; 
  
export default class StudentsRoute extends Route { 
  
    CreateEmployee() { 
        let Employee = EmberObject.create({ 
            name: '', 
            gender: '', 
            position: '', 
            Salary: 0, 
            email: '', 
            mobile: '', 
        }); 
        return Employee; 
    } 
    setName(data) { 
        return this.employee.set('name', data); 
    } 
    setGender() { 
        return this.employee.set('gender', 'M'); 
    } 
    setPosition(data) { 
        return this.employee.set('position', data); 
    } 
    SalaryDecrease(data) { 
        return this.employee.decrementProperty('Salary', data); 
    } 
    SalaryIncrease(data) { 
        return this.employee.incrementProperty('Salary', data); 
    } 
    setEmail(data) { 
        return this.employee.set('email', data); 
    } 
    setMobile(data) { 
        return this.employee.set('mobile', data); 
    } 
    model() { 
        this.employee = this.CreateEmployee(); 
        this.employee.name = this.setName('Yogesh Verma'); 
        this.employee.gender = this.setGender(); 
        this.employee.position = this.setPosition('Software Engineer'); 
        this.employee.email = this.setEmail('yogesh@gmail.com'); 
        this.employee.mobile = this.setMobile('9382938239'); 
        this.SalaryIncrease(94000); 
        this.SalaryDecrease(4000); 
        return this.employee; 
    } 
    setupController(controller, model) { 
        super.setupController(controller, model); 
        controller.set('employee', this.employee); 
    } 
}

應用程序/模板/test1.hbs

HTML


{{page-title "Employee"}} 
<h1>Employee Details:</h1> 
<div>Name: {{this.employee.name}}</div> 
<div>Gender: {{this.employee.gender}}</div> 
<div>Position: {{this.employee.position}}</div> 
<div>Salary: {{this.employee.Salary}}</div> 
<div>Mobile: {{this.employee.mobile}}</div> 
<div>Email: {{this.employee.email}}</div> 
{{outlet}}

輸出：

輸出1

示例 2：鍵入以下代碼以生成本示例的路由：

ember generate route test2

應用程序/路線/test2.js

Javascript


import Route from '@ember/routing/route'; 
import EmberObject from '@ember/object'; 
import Ember from 'ember'; 
  
const Student = EmberObject.extend({ 
    changed: Ember.observer('Marks', function () { 
        console.log(`Marks Changed`); 
    }) 
}); 
export default class WebsitesRoute extends Route { 
  
    students = [ 
        Student.create({ 
            fullName: 'Sam Snehil', 
            Marks: 92, 
            class: 11, 
        }), 
        Student.create({ 
            fullName: 'Ram Sahu', 
            Marks: 84, 
            class: 10, 
        }), 
        Student.create({ 
            fullName: 'Soham Verma', 
            Marks: 89, 
            class: 12, 
        }), 
        Student.create({ 
            fullName: 'David Tigga', 
            Marks: 95, 
            class: 9, 
        }), 
        Student.create({ 
            fullName: 'Pokhu Verma', 
            Marks: 95, 
            class: 10, 
        }), 
        Student.create({ 
            fullName: 'Satyam Verma', 
            Marks: 96, 
            class: 12, 
        }), 
    ]; 
  
    temp; 
    model() { 
        return this.students; 
    } 
    setupController(controller, model) { 
        super.setupController(controller, model); 
        controller.set('students', this.students); 
        controller.set('temp', this.temp); 
    } 
}

應用程序/控製器/test2.js

Javascript


import Ember from 'ember'; 
  
export default Ember.Controller.extend({ 
    actions: { 
  
        increaseMarks(data) { 
            this.students.forEach((item) => 
                item.incrementProperty('Marks', JSON.parse(data))); 
        }, 
        decreaseMarks(data) { 
            this.students.forEach((item) => 
                item.decrementProperty('Marks', JSON.parse(data))); 
        }, 
    }, 
});

應用程序/模板/test2.hbs

HTML


{{page-title "incrementProperty"}} 
<h3>List of Item in Buckets</h3> 
<table> 
    <tr> 
        <th> Name </th> 
        <th>Class </th> 
        <th>Marks </th> 
      </tr> 
      {{#each @model as |temp|}} 
        <tr> 
              <td>{{temp.fullName}}</td> 
              <td>{{temp.class}}</td> 
              <td>{{temp.Marks}}</td> 
        </tr> 
      {{/each}} 
</table> 
<br /> 
<div> 
    <label>Enter value : </label> 
      {{input value=this.item}} 
</div><br /> 
<input
    type="button"
      id="increase-property"
      value="Increase Quantity"
      {{action "increaseMarks" this.item}} 
/> 
<br /><br /> 
<input
    type="button"
      id="decrease-property"
      value="decrease Quantity"
      {{action "decreaseMarks" this.item}} 
/> 
{{outlet}}

輸出：

輸出2

參考：https://api.emberjs.com/ember/4.9/classes/EmberRouter/methods/incrementProperty?anchor=incrementProperty

相關用法

注：本文由純淨天空篩選整理自jeemains0neet大神的英文原創作品 Ember.js EmberRouter incrementProperty() Method。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。