Debugging

Here we discuss how to debug the client-side code. For server side debugging, please consult the IDE manual you use.

Developer Tool

First, it is suggested to open a developer tool in the browser you're working with.

Browser	Debugger
Chrome	Press F12. Or click Chrome menu at the top-right of your browser window, then select More Tools > Developer Tools
Firefox	developer tool. Press F12. Or click menu at the top-right of your browser, then select Web Developer.
Safari	Developer Tools. Click the menu Develop \ Show Error Console
Internet Explorer 8 , 9, 10, 11, Edge	Developer Tools It is built-in and you could start it by pressing F12.
Internet Explorer 7	Microsoft script debugger , fiddler2(network inspection) ,there's another choice is to use Develope Tool in IE8 with IE7 compatible mode
Internet Explorer 6	Microsoft script debugger , fiddler2(network inspection)

Turn Off Compression and Cache

By default, the JavaScript files (ZK packages) will be compressed and cached, which is hard to step in and debug. You can turn off the compression and the cache of JavaScript files by specifying the following in WEB-INF/zk.xml:

<client-config>
    <debug-js>true</debug-js>
</client-config>
<library-property>
    <name>org.zkoss.web.classWebResource.cache</name>
    <value>false</value>
</library-property>
<library-property>
    <name>org.zkoss.zk.WPD.cache</name>
    <value>false</value>
</library-property>

Get ZK and add-on Component Version

Sometimes, you need to get the product version at runtime for debugging. Please run the following JavaScript statements in your browser's console:

zk.version;
zk.getVersion('gmaps');
zk.getVersion('zss');
zk.getVersion('ckez');
zk.getVersion('chart');