Function defineKeyPropWarningGetter

packages/react/src/jsx/ReactJSXElement.js:112–132

(props, displayName)

}

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,
    });
  }
}

function elementRefGetterWithDeprecationWarning() {
  if (__DEV__) {