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createOldToNewPropsMapping() — react Function Reference

Architecture documentation for the createOldToNewPropsMapping() function in OutlineJsx.ts from the react codebase.

Function typescript BabelCompiler Optimization calls 2 called by 1

Entity Profile

Dependency Diagram

graph TD
  d6862a21_d6b5_bc01_57d7_ae9d1c1f23ce["createOldToNewPropsMapping()"]
  158befb1_050c_87d2_b4ec_54305bac5a4f["OutlineJsx.ts"]
  d6862a21_d6b5_bc01_57d7_ae9d1c1f23ce -->|defined in| 158befb1_050c_87d2_b4ec_54305bac5a4f
  c201bbda_dc3c_7b58_7ce0_7d61d25ef972["emitOutlinedFn()"]
  c201bbda_dc3c_7b58_7ce0_7d61d25ef972 -->|calls| d6862a21_d6b5_bc01_57d7_ae9d1c1f23ce
  49446ae1_b830_9411_8258_1139d21b314b["createTemporaryPlace()"]
  d6862a21_d6b5_bc01_57d7_ae9d1c1f23ce -->|calls| 49446ae1_b830_9411_8258_1139d21b314b
  dcb26d23_8970_206b_e5d8_91b588c501b5["makeIdentifierName()"]
  d6862a21_d6b5_bc01_57d7_ae9d1c1f23ce -->|calls| dcb26d23_8970_206b_e5d8_91b588c501b5
  style d6862a21_d6b5_bc01_57d7_ae9d1c1f23ce fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

compiler/packages/babel-plugin-react-compiler/src/Optimization/OutlineJsx.ts lines 467–488

function createOldToNewPropsMapping(
  env: Environment,
  oldProps: Array<OutlinedJsxAttribute>,
): Map<IdentifierId, OutlinedJsxAttribute> {
  const oldToNewProps = new Map();

  for (const oldProp of oldProps) {
    // Do not read key prop in the outlined component
    if (oldProp.originalName === 'key') {
      continue;
    }

    const newProp: OutlinedJsxAttribute = {
      ...oldProp,
      place: createTemporaryPlace(env, GeneratedSource),
    };
    newProp.place.identifier.name = makeIdentifierName(oldProp.newName);
    oldToNewProps.set(oldProp.place.identifier.id, newProp);
  }

  return oldToNewProps;
}

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Called By

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Frequently Asked Questions

What does createOldToNewPropsMapping() do?
createOldToNewPropsMapping() is a function in the react codebase, defined in compiler/packages/babel-plugin-react-compiler/src/Optimization/OutlineJsx.ts.
Where is createOldToNewPropsMapping() defined?
createOldToNewPropsMapping() is defined in compiler/packages/babel-plugin-react-compiler/src/Optimization/OutlineJsx.ts at line 467.
What does createOldToNewPropsMapping() call?
createOldToNewPropsMapping() calls 2 function(s): createTemporaryPlace, makeIdentifierName.
What calls createOldToNewPropsMapping()?
createOldToNewPropsMapping() is called by 1 function(s): emitOutlinedFn.

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