insert_code
Insert formatted code before or after specific JavaScript/TypeScript nodes. Automatically handles indentation for adding logging, validation, comments, error handling, and metrics.
Instructions
Insert code before or after nodes with smart formatting. Professional-quality code insertion with proper indentation.
Examples: • Add logging: insert_code('function_declaration', 'console.log("Function started");', 'after') • Add validation: insert_code('method_definition[name="save"]', 'if (!this.isValid()) return;', 'after') • Add comments: insert_code('class_declaration', '// Main user management class', 'before') • Add error handling: insert_code('function[async]', 'try {', 'after') + insert_code('function[async]', '} catch(e) { console.error(e); }', 'after') • Add metrics: insert_code('function[name*="api"]', 'performance.mark("api-start");', 'after') • Debug mode: insert_code('call[text*="fetch"]', 'console.log("API call:", url);', 'before')
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| code | Yes | Code to insert. Will be formatted with proper indentation automatically. | |
| pattern | Yes | Pattern to match: 'function_declaration', 'class[name="MyClass"]', 'method_definition[async]' | |
| position | Yes | Insert position: 'before' (above) or 'after' (below) the matched nodes | |
| preview | No | Return preview only without applying changes (default: false). Always preview first! |