mcp-server-semgrep/semgrep-rules/typescript/react/best-practice/react-legacy-component.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
  - id: react-legacy-component
    patterns:
      - pattern: |
          $METHOD(...) {
            ...
          }
      - metavariable-regex:
          metavariable: $METHOD
          regex: componentWillMount|componentWillReceiveProps|componentWillUpdate
    message: >-
      Legacy component lifecycle was detected - $METHOD.
    languages:
      - typescript
      - javascript
    severity: WARNING
    metadata:
      category: best-practice
      technology:
        - react