javascript - ext.js is undefined - Stack Overflow

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In my aspx page:

<script type="text/javascript">
Ext.onReady(function() {
    Ext.get('mb1').on('click', function(e) {
        Ext.MessageBox.confirm('Confirm', 'Are you sure you want to do that?', showResult);
});
function showResult() {
    Ext.example.msg('test');
</script>

<div>
<asp:Button ID="mb1" runat="server" Text="Button" />
</div>

I got error message "ext is undefined". Can anyone help me?

In my aspx page:

<script type="text/javascript">
Ext.onReady(function() {
    Ext.get('mb1').on('click', function(e) {
        Ext.MessageBox.confirm('Confirm', 'Are you sure you want to do that?', showResult);
});
function showResult() {
    Ext.example.msg('test');
</script>

<div>
<asp:Button ID="mb1" runat="server" Text="Button" />
</div>

I got error message "ext is undefined". Can anyone help me?

• javascript
• extjs

Share Improve this question Follow edited Jun 13, 2014 at 19:01 JasonMArcher 15k2222 gold badges5959 silver badges5353 bronze badges asked Nov 27, 2009 at 6:09 DhanrajDhanraj 7511 silver badge33 bronze badges 1

• Have you included all the necessary script files? – rahul Commented Nov 27, 2009 at 6:12

Add a ment  | 

4 Answers 4

Sorted by: Reset to default 8

You have to include the js file like

<script type="text/javascript" src="extjs.js"></script>

before using any of the functions.

you should download the extjs framework from the site itself and host it locally if you can. http://extjs.

1. Is it possible that you used "ext" somewhere instead of "Ext" (wrong capitalization)?
2. you don't seem to be closing your functions with "}"

Once you get Ext working, you'll probably want to use the button's client ID instead of the code-behind ID:

...
Ext.get('<%=mb1.ClientID%>').on('click', function(e) {
...

Include below all three file in your file ext-all.css,ext-base.js,ext-all-debug.js

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