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Ember.js ObjectProxy incrementProperty() Method

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  • Last Updated : 26 Dec, 2022
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Ember.js is an open-source JavaScript framework used for developing large client-side web applications which is based on Model-View-Controller (MVC) architecture. Ember.js is one of the most widely used front-end application frameworks. It is made to speed up development and increase productivity. Currently, it is utilized by a large number of websites, including Square, Discourse, Groupon, Linked In, Live Nation, Twitch, and Chipotle.

The incrementProperty() method is used to increment the value of the property to some amount.

Syntax:

incrementProperty( keyName, increment );

Parameters:

  • keyName: It is the name of the property whose value we want to increment.
  • increment: It is the value to which we want to increment.

Return Value: The new property value.

Steps to Install and Run Ember.js:

Step 1: To run the following examples you will need to have an ember project with you. To create one, you will need to install ember-cli first. Write the below code in the terminal.

npm install ember-cli

Step 2: Now you can create the project by typing in the following piece of code:

ember new <project-name> --lang en

To start the server, type:

ember serve

Example 1: Type the following code to generate the route for this example:

ember generate route increment1

app/routes/increment1.js

Javascript




import Route from '@ember/routing/route';
import EmberObject from '@ember/object';
 
export default class WebsitesRoute extends Route {
 
    temp;
    model() {
        return 'Increment Property';
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('temp', this.temp);
        controller.set('temp2', this.temp2);
    }
}


app/controllers/increment1.js

Javascript




import Ember from 'ember';
import EmberObject from '@ember/object';
 
const Food = EmberObject.extend({
    toStringExtension() {
        return this.get('food');
    }
});
export default Ember.Controller.extend({
    value: 0,
    food: [
        Food.create({
            food: 'apple',
            isFruit: true,
            quant: '1',
        }),
        Food.create({
            food: 'Potato',
            isFruit: false,
            quant: '2',
        }),
        Food.create({
            food: 'Banana',
            isFruit: true,
            quant: '1',
        }),
        Food.create({
            food: 'Burgur',
            isFruit: false,
            quant: '2',
        }),
        Food.create({
            food: 'Orange',
            isFruit: true,
            quant: '1',
        }),
        Food.create({
            food: 'sandwitch',
            isFruit: false,
            quant: '2',
        }),
        Food.create({
            food: 'bean',
            isFruit: false,
            quant: '2',
        }),
    ],
    actions: {
        older() {
            this.incrementProperty('value');
        },
        younger() {
            this.decrementProperty('value');
        },
 
        addItem(data, data1, data2) {
 
            let temp = Food.create({
                food: data,
                isFruit: data1,
                quant: data2
            });
            alert(temp.toString() + ' Created');
            this.food.addObject(temp);
        }
    }
});


app/templates/increment1.hbs

HTML




{{page-title "incrementProperty"}}
<h3>List of Item in Buckets</h3>
<table>
    <tr>
        <th> Food Name </th>
        <th>Bucket </th>
        <th>Fruit </th>
      </tr>
      {{#each this.food 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}}


Output:

incrementProperty output1

Example 2: Type the following code to generate the route for this example:

ember generate route increment2

app/routes/increment2.js

Javascript




import Route from '@ember/routing/route';
import EmberObject from '@ember/object';
 
export default class WebsitesRoute extends Route {
    temp;
    model() {
        return "Increment Property";
    }
    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

Javascript




import Ember from 'ember';
import EmberObject from '@ember/object';
 
const Student = EmberObject.extend({
    toStringExtension() {
        return this.get('food');
    }
});
export default Ember.Controller.extend({
    class: 10,
    age: 15,
    student: [
        Student.create({
            Name: 'Aarbh',
            class: 12,
            age: 18,
        }),
        Student.create({
            Name: 'viky',
            class: 9,
            age: 15,
        }),
        Student.create({
            Name: 'Chiku',
            class: 8,
            age: 11,
        }),
        Student.create({
            Name: 'Nikki',
            class: 11,
            age: 17,
        }),
        Student.create({
            Name: 'Ankit',
            class: 8,
            age: 14,
        }),
        Student.create({
            Name: 'Sonam',
            class: 11,
            age: 17,
        }),
        Student.create({
            Name: 'Ravi',
            class: 10,
            age: 16,
        }),
    ],
    actions: {
        older(data) {
            this.incrementProperty(data);
        },
        younger(data) {
            this.decrementProperty(data);
        },
 
        addItem(data, data1, data2) {
 
            let temp = Student.create({
                Name: data,
                class: data1,
                age: data2
            });
            alert(temp.toString() + ' Student Added in list');
            this.student.addObject(temp);
        }
    }
});


app/templates/increment2.hbs

HTML




{{page-title "incrementProperty"}}
<h3>List of Item in Buckets</h3>
<table>
    <tr>
        <th> Name </th>
        <th>Class </th>
        <th>Age </th>
      </tr>
      {{#each this.student as |website|}}
        <tr>
              <td>{{website.Name}}</td>
              <td>{{website.class}}</td>
              <td>{{website.age}}</td>
        </tr>
      {{/each}}
</table>
<br /><br />
<div>
    <label>Enter Student Name: </label>
      {{input value=this.temp2}}
</div>
<br />
<div>
    <label>Enter Age: </label>
      {{input value=this.age}}
</div>
<input
    type="button"
    id="increase"
    value="+"
    {{action "older" "age"}} />
<input
    type="button"
    id="decrease"
    value="-"
    {{action "younger" "age"}} />
<br />
<br />
<div>
    <label>Enter Class: </label>
      {{input value=this.class}}
</div>
<input
    type="button"
    id="increase"
    value="+"
    {{action "older" "class"}} />
<input
    type="button"
    id="decrease"
    value="-"
    {{action "younger" "class"}} />
<br />
<br />
<br /><br />
<input
    type="button"
      id="all-students"
      value="Add item"
      {{action "addItem" this.temp2 this.class this.age}}
/>
{{outlet}}


Output:

IncrementPropert output2

Reference: https://api.emberjs.com/ember/4.4/classes/ObjectProxy/methods/incrementProperty?anchor=incrementProperty


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