Drupal includes built-in methods for implementing Javascript. Using these methods when you use Javascript will help to keep your code clean and to ensure compatibility with other modules' implementations.
A couple of simple principles guide Drupal's Javascript approach:
- All pages should be perfectly functional without scripts. Javascript provides alternatives or supplements - not replacements - for standard elements.
- No Javascript is hard-coded onto pages. Rather, actions are attached dynamically to page elements--and only if needed Javascript support is present.
See also the js developer API in the API section of the handbook.
Note: this section is currently being overhauled. The numbered subsections are the new content added to date - more to come very soon! The non-numbered subsections are old content that needs to be incorporated, updated or removed.
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