JavaScript in Launchpad
This page covers everything to do with JavaScript development in Launchpad.
Some useful links:
See all the JavaScript-related pages on the wiki
Zope JavaScript Gotchas
Zope's TAL engine is clever, and helpfully breaks any <script> nodes in your template. Here's how to make the TAL interpreter do the right thing:
<js tal:replace="structure <script>...</script>" />
Zope3 forms have field names with dots in them, like this:
<input id="field.action.visibility" name="field.action.visibility" type="hidden"/>
This is probably invalid by the W3C identites specification, and makes it impossible to select nodes with CSS3 selectors, and YUI3's Y.get() call.
This will return null:
Y.get('#field.action.visibility');
To work around this, you can take advantage of Y.get()'s node-wrapping abilities.
These all work correctly, returning a Node instance:
Y.get(Y.DOM.byId('field.action.visibility')); Y.get(document.getElementById('field.action.visibility')); Y.get("#someform input[name='field.action.visibility']");