Extjs案例 - W3xue在线HTML/CSS/JS运行工具

<!DOCTYPE html>
<html>
   <head>
   <link href="//cdn.bootcss.com/extjs/6.2.0/classic/theme-classic/resources/theme-classic-all.css" rel="stylesheet" />
   <script type="text/javascript" src="//cdn.bootcss.com/extjs/6.2.0/ext-all.js"></script>
      <script type="text/javascript">
         Ext.onReady(function(){
            Ext.create('Ext.Button', {
               renderTo: Ext.getElementById('button1'),
               text: 'Button1',
               listeners: {
                  click: function() {
                     Ext.MessageBox.alert('Alert box', 'Button 1 is clicked');	
                  }
               }
            });
             Ext.create('Ext.Button', {
               renderTo: Ext.getElementById('button2'),
               text: 'Button2',
               listeners: {
                  click: function() {
                     Ext.MessageBox.alert('Alert box', 'Button 2 is clicked');	
                  }
               }
            });
             Ext.create('Ext.Button', {
               renderTo: Ext.getElementById('button3'),
               text: 'Button3',
               listeners: {
                  click: function() {
                     Ext.MessageBox.alert('Alert box', 'Button 3 is clicked');	
                  }
               }
            });
         });     
      </script>
   </head>
   <body> <p>Please click the button to see event listener:</p>
      <span id="button3"/>
      <span id="button2"/>
      <span id="button1"/>
   </body>
</html>

AخA
 
<!DOCTYPE html>
<html>
   <head>
   <link href="//cdn.bootcss.com/extjs/6.2.0/classic/theme-classic/resources/theme-classic-all.css" rel="stylesheet" />
   <script type="text/javascript" src="//cdn.bootcss.com/extjs/6.2.0/ext-all.js"></script>
      <script type="text/javascript">
         Ext.onReady(function(){
            Ext.create('Ext.Button', {
               renderTo: Ext.getElementById('button1'),
               text: 'Button1',
               listeners: {
                  click: function() {
                     Ext.MessageBox.alert('Alert box', 'Button 1 is clicked');  
                  }
               }
            });
             Ext.create('Ext.Button', {
               renderTo: Ext.getElementById('button2'),
               text: 'Button2',
               listeners: {
                  click: function() {
                     Ext.MessageBox.alert('Alert box', 'Button 2 is clicked');  
                  }
               }