Google Choice: Ext.js - First Program

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Friday, February 17, 2017

Ext.js - First Program

This chapter list down the steps to write first Hello World program in Ext JS:

Step 1

Create index.htm page in an editor of our choice. Include the required library files in head section of html page as mentioned below:

index.htm

<!DOCTYPE html>
<html>
   <head>
      <link href="https://cdnjs.cloudflare.com/ajax/libs/extjs/6.0.0/classic/theme-classic/resources/theme-classic-all.css" rel="stylesheet" />
      <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/extjs/6.0.0/ext-all.js"></script>
      <script type="text/javascript">
         Ext.onReady(function() {
         Ext.create('Ext.Panel', {
            renderTo: 'helloWorldPanel',
            height: 200,
            width: 600,
            title: 'Hello world',
            html: 'First Ext JS Hello World Program'
            });
         });
      </script>
   </head>
   <body>
      <div id="helloWorldPanel" />
   </body>
</html>

Explanation

Ext.onReady() method will be called once the Ext JS is ready to render the Ext JS elements.
Ext.create() method is used to create object in Ext JS here we are creating an object of simple panel class Ext.Panel.
Ext.Panel is the predefined class in Ext JS for creating a panel.
Every Ext JS class has different properties to perform some basic functionalities.

Ext.Panel class has various properties as:

renderTo is the element where this panel has to be render. 'helloWorldPanel' is the div id in Index.html file.
Height and width properties are for giving custom size of the panel.
Title property is to provide the title to the panel.
Html property is the html content to be shown in the panel.

Step 2

Open index.htm file in a standard browser and you will get the following output on browser.

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