Ember.js Observable decrementProperty() Method
Last Updated :
26 Dec, 2022
Ember.js is an open-source JavaScript framework used for developing large client-side web applications which are 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 property to some amount.
Syntax:
decrementProperty(keyName,decrement);
Parameters:
- keyName: It is the name of the property whose value we want to decrement.
- decrement: It is the value to which we want to decrement. The default value is 1.
Return Value: This method returns a 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
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/decrement1.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/decrement1.hbs
HTML
{{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-students"
value = "Add item"
{{action "addItem" this.temp2 this.class this.age}}
/>
{{outlet}}
|
Output:
decrementProperty output1
Reference: https://api.emberjs.com/ember/4.4/classes/Observable/methods/decrementProperty?anchor=decrementProperty
Share your thoughts in the comments
Please Login to comment...