Method extractFromRenderProp

scripts/extractFormFields.ts:225–274

(
    arrowFn: ts.ArrowFunction,
    sourceFile: ts.SourceFile
  )

  }

  private extractFromRenderProp(
    arrowFn: ts.ArrowFunction,
    sourceFile: ts.SourceFile
  ): Partial<ExtractedField> {
    const metadata: Partial<ExtractedField> = {};

    // Traverse arrow function body to find label and hintText
    const visit = (node: ts.Node) => {
      if (ts.isJsxElement(node) || ts.isJsxSelfClosingElement(node)) {
        const tagName = this.getJsxTagName(node, sourceFile);

        // Extract label/hintText props from any component
        const label = this.getJsxAttributeExpression(node, 'label', sourceFile);
        if (label && !metadata.label) {
          metadata.label = label;
        }

        if (this.hasJsxAttribute(node, 'hintText') && !metadata.hintText) {
          const hintText = this.getJsxAttributeExpression(node, 'hintText', sourceFile);
          // Attribute present but non-string → serialize as empty string
          metadata.hintText = hintText ?? "''";
        }

        // Extract label from Meta.Label (text is in children)
        if (tagName?.endsWith('.Label') || tagName === 'Meta.Label') {
          const text = this.getJsxTextContent(node, sourceFile);
          if (text && !metadata.label) {
            metadata.label = text;
          }
        }

        // Extract hintText from Meta.HintText (text is in children)
        if (tagName?.endsWith('.HintText') || tagName === 'Meta.HintText') {
          if (!metadata.hintText) {
            const text = this.getJsxTextContent(node, sourceFile);
            // Tag present but non-string content → serialize as empty string
            metadata.hintText = text ?? "''";
          }
        }
      }

      ts.forEachChild(node, visit);
    };

    if (arrowFn.body) {
      visit(arrowFn.body);
    }

    return metadata;
  }

  /**
   * Extract text content from JSX element children as expression (for Meta.Label, Meta.HintText)