Backbone.js extend View
Last Updated :
20 Aug, 2022
Backbone.js extend view is a method under the view class that is used to extend the backbone.js view class in order to create a custom view class. For implementation, first of all, we need to create a custom view class and override the render function if required, also we can specify our own declarative events.
Syntax:
Backbone.view.extend( properties , [classProperties] )
Parameter values:
- properties: It defines the instance properties for the view class.
- classProperties: It defines the class properties of the constructor function attached to it.
Example 1: Basic example for implementing backbone.js extend the view.
HTML
<!DOCTYPE html>
< html >
< head >
< title >Backbone.js view extend</ 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 >
< button onclick = "invoke()" >Click me</ button >
< script >
var example = Backbone.View.extend({
tagName: "test",
className: "example_display",
events: {
},
initialize: function () {
// Put pre-render processing code here
this.render();
},
render: function () {
// Put html render content here
document.write(
"< h2 >This output is from render function</ h2 >");
}
});
function invoke() {
var obj = new example();
}
</ script >
</ body >
</ html >
|
Output:
Example 2: In this example, we are using a simple boilerplate for the reference implementation.
HTML
<!DOCTYPE html>
< html >
< head >
< title >Backbone.js view extend</ title >
< script src =
</ script >
< script src =
type = "text/javascript" >
</ script >
< script src =
type = "text/javascript" >
</ script >
</ head >
< body >
< h1 style = "color:green;" >GeeksforGeeks</ h1 >
< script >
var example = Backbone.View.extend({
tagName: "test",
className: "example_display",
events: {
},
initialize: function () {
//put pre-render processing code here
window.alert('Initialization function invoked');
this.render();
},
render: function () {
//put html render content here
window.alert('render function invoked');
}
});
var obj = new example();
</ script >
</ body >
</ html >
|
Output:
Reference: https://backbonejs.org/#View-extend
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