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defineKeyPropWarningGetter() — react Function Reference

Architecture documentation for the defineKeyPropWarningGetter() function in ReactJSXElement.js from the react codebase.

Function javascript BabelCompiler Validation called by 2

Entity Profile

Dependency Diagram

graph TD
  1b0887cd_9134_1155_2c11_e7904b1a4478["defineKeyPropWarningGetter()"]
  1bf5591f_27a1_c79f_853a_6242549e0e07["ReactJSXElement.js"]
  1b0887cd_9134_1155_2c11_e7904b1a4478 -->|defined in| 1bf5591f_27a1_c79f_853a_6242549e0e07
  ad281e06_8a7d_3988_f68c_33f816bae40c["jsxDEVImpl()"]
  ad281e06_8a7d_3988_f68c_33f816bae40c -->|calls| 1b0887cd_9134_1155_2c11_e7904b1a4478
  12bdbda4_5438_2837_0178_e722d4b02c99["createElement()"]
  12bdbda4_5438_2837_0178_e722d4b02c99 -->|calls| 1b0887cd_9134_1155_2c11_e7904b1a4478
  style 1b0887cd_9134_1155_2c11_e7904b1a4478 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/react/src/jsx/ReactJSXElement.js lines 121–141

function defineKeyPropWarningGetter(props, displayName) {
  if (__DEV__) {
    const warnAboutAccessingKey = function () {
      if (!specialPropKeyWarningShown) {
        specialPropKeyWarningShown = true;
        console.error(
          '%s: `key` is not a prop. Trying to access it will result ' +
            'in `undefined` being returned. If you need to access the same ' +
            'value within the child component, you should pass it as a different ' +
            'prop. (https://react.dev/link/special-props)',
          displayName,
        );
      }
    };
    warnAboutAccessingKey.isReactWarning = true;
    Object.defineProperty(props, 'key', {
      get: warnAboutAccessingKey,
      configurable: true,
    });
  }
}

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Defined In

Called By

Source

Frequently Asked Questions

What does defineKeyPropWarningGetter() do?
defineKeyPropWarningGetter() is a function in the react codebase, defined in packages/react/src/jsx/ReactJSXElement.js.
Where is defineKeyPropWarningGetter() defined?
defineKeyPropWarningGetter() is defined in packages/react/src/jsx/ReactJSXElement.js at line 121.
What calls defineKeyPropWarningGetter()?
defineKeyPropWarningGetter() is called by 2 function(s): createElement, jsxDEVImpl.

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