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 decrementProperty() method is used to decrease the value of the property to some amount.
Syntax:
decrementProperty( keyName, decrement );
Parameters:
- keyName: It is the name of a property whose value we want to decrement.
- decrement: It is the amount by which property will decrement.
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 decrement1
app/routes/decrement1.js
import Route from '@ember/routing/route';
import EmberObject from '@ember/object';
export default class WebsitesRoute extends Route {
temp2;
temp;
model() {
return "Increment Property";
}
setupController(controller, model) {
super.setupController(controller, model);
controller.set('temp', this.temp);
controller.set('temp2', this.temp2);
}
} |
app/controllers/decrement1.js
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/decrement1.hbs
{{page-title "decrementProperty"}}<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-Fruits" value="Add item"
{{action 'addItem' this.temp2 this.class this.age}} />
{{outlet}} |
Output:
decrementProperty output1
Example 2: Type the following code to generate the route for this example:
ember generate route decrement2
app/routes/decrement2.js
import Route from '@ember/routing/route';
import EmberObject from '@ember/object';
export default class WebsitesRoute extends Route {
temp;
temp2;
model() {
return 'Increment Property';
}
setupController(controller, model) {
super.setupController(controller, model);
controller.set('temp', this.temp);
controller.set('temp2', this.temp2);
}
} |
app/controllers/decrement2.js
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/decrement1.hbs
{{page-title "decrementProperty"}}<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 or 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:
decrementProperty output1