To utilize Aptana Studio’s code completion and validation features for JavaScript, HTML, and CSS, follow these steps:
1. Install Aptana Studio and create a new project by selecting the appropriate project type (Web Project for HTML/CSS/JS).
2. Configure language preferences in Window > Preferences > Aptana Studio > Editors to enable/disable specific languages’ code assist.
3. While coding, use Ctrl+Space to trigger code completion suggestions. The IDE will display relevant options based on context.
4. For real-time validation, ensure “Build Automatically” is enabled under Project menu. Errors and warnings appear in the Problems view as you type.
5. Customize validation rules in Window > Preferences > Aptana Studio > Validation. Enable/disable validators or adjust severity levels.
6. Use built-in formatter (Ctrl+Shift+F) to maintain consistent code style across your project.