Backbone.js setElement View
Backbone.js is a compact library used to organize JavaScript code. Another name for it is an MVC/MV* framework. If you are not familiar with MVC, it is only a user interface design paradigm. JavaScript functions make it much simpler to create a program’s user interface. Models, views, events, routers, and collections are among the building blocks offered by BackboneJS to help developers create client-side web applications.
View’s setElement method can be used to apply an existing Backbone view to a different DOM element.
Syntax:
view.setElement(element)
Used Parameter:
- element: This parameter specifies the element which is changed from the existing element to a new element.
Example 1: The code below defines how to use the setElement method in the view.
HTML
<!DOCTYPE html>
< html >
< head >
< title >Backbone.js setElement View</ title >
type = "text/javascript" >
</ script >
< script src =
type = "text/javascript" >
</ script >
< script src =
type = "text/javascript" >
</ script >
</ head >
< body >
< h1 style = "color: green;" >
GeeksforGeeks
</ h1 >
< h3 >Backbone.js setElement View</ h3 >
< div id = "myview" >
Enter any text: < input type = "text" />
</ div >
< script type = "text/javascript" >
// 'Demo' is a name of the new view class
var Demo = Backbone.View.extend({
// Event triggers 'sayHi' function when
// you enter the text in input tag
events: {
'change input': 'Hello'
},
// This function is called when the
// view is instantiated
initialize: function () {
// 'setElement' changes the element
// associated with the view
this.setElement($('#myview'));
},
// After entering the text, it displays the
// below line on the body below the h3
Hello: function () {
this.$el.html('Welcome to Gfg!! This '
+ 'is a demo of the setElement '
+ 'method of View');
}
});
// 'demo' is a instance of the 'Demo' class
var demo = new Demo;
</ script >
</ body >
</ html >
|
Output:
Example 2: The code below demonstrates how to trigger a template from a button using the setElement method.
HTML
<!DOCTYPE html>
< html >
< head >
< title >Backbone.js setElement View</ title >
type = "text/javascript" >
</ script >
< script src =
type = "text/javascript" >
</ script >
< script src =
type = "text/javascript" >
</ script >
</ head >
< body >
< h1 style = "color: green;" >
GeeksforGeeks
</ h1 >
< h3 >Backbone.js setElement View</ h3 >
< div id = "myButton" >
Example Button: < input type = "button" id = "hi"
value = "Click me to trigger the Template" />
</ div >
< script type = "text/javascript" >
// 'Demo' is a name of the new view class
var Demo = Backbone.View.extend({
template: _.template('This is the Example template'),
events: {
'click input': 'trigger'
},
// This function is called when the
// view is instantiated
initialize: function () {
this.setElement($('#myButton'));
// 'setElement' changes the element
// associated with the view
},
// After clicking on the button, it
// displays the template
trigger: function () {
this.$el.html(this.template);
}
});
// 'demo' is a instance of the 'Demo' class
var demo = new Demo;
</ script >
</ body >
</ html >
|
Output:
Reference: https://backbonejs.org/#View-setElement
Last Updated :
02 Aug, 2022
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