How to use the onkeyup event to a TextField?

Question

I want to use onkeyup event of text field, so we can count that character when enter the text.

Answer 1

You are almost there. In the doc field key events, it is written that key events get fired only if enableKeyEvents is set to true.

           {
                xtype: 'textfield',
                fieldLabel: 'Address',
                width: '100%',                    
                enableKeyEvents : true,
                listeners: { 
                    keyup : function(obj) { 
                     alert('test fire ' + obj.getValue()); 
                     } 
                   }
            },