removeFunctionParameters() — react Function Reference

Architecture documentation for the removeFunctionParameters() function in minimize.ts from the react codebase.

Function typescript BabelCompiler Optimization calls 1

Entity Profile

BabelCompiler→ Optimization→ removeFunctionParameters() — react Function Reference

Dependency Diagram

graph TD
  a4e8a568_1995_ad27_6561_2968b82ca928["removeFunctionParameters()"]
  9c061da8_dbf8_4168_823d_991654a3c55d["minimize.ts"]
  a4e8a568_1995_ad27_6561_2968b82ca928 -->|defined in| 9c061da8_dbf8_4168_823d_991654a3c55d
  7a9af496_ef6a_d9e8_8eaf_1f386f49e4b3["cloneAst()"]
  a4e8a568_1995_ad27_6561_2968b82ca928 -->|calls| 7a9af496_ef6a_d9e8_8eaf_1f386f49e4b3
  style a4e8a568_1995_ad27_6561_2968b82ca928 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

compiler/packages/snap/src/minimize.ts lines 230–264

function* removeFunctionParameters(ast: t.File): Generator<t.File> {
  // Collect all functions with parameters
  const funcSites: Array<{funcIndex: number; paramCount: number}> = [];
  let funcIndex = 0;
  t.traverseFast(ast, node => {
    if (t.isFunction(node) && node.params.length > 0) {
      funcSites.push({funcIndex, paramCount: node.params.length});
      funcIndex++;
    }
  });

  // For each function, try removing each parameter (from end to start)
  for (const {funcIndex: targetFuncIdx, paramCount} of funcSites) {
    for (let paramIdx = paramCount - 1; paramIdx >= 0; paramIdx--) {
      const cloned = cloneAst(ast);
      let idx = 0;
      let modified = false;

      t.traverseFast(cloned, node => {
        if (modified) return;
        if (t.isFunction(node) && node.params.length > 0) {
          if (idx === targetFuncIdx && paramIdx < node.params.length) {
            node.params.splice(paramIdx, 1);
            modified = true;
          }
          idx++;
        }
      });

      if (modified) {
        yield cloned;
      }
    }
  }
}