Function invariant

packages/core/src/utils/invariant.ts:22–40

(condition: boolean, format?: string, ...args: any[])

}

function invariant(condition: boolean, format?: string, ...args: any[]) {
  validateFormat(format);

  if (!condition) {
    let error: Error & { framesToPop?: number };
    if (format === undefined) {
      error = new Error(
        'Minified exception occurred; use the non-minified dev environment for the full error message and additional helpful warnings.'
      );
    } else {
      let argIndex = 0;
      error = new Error(format.replace(/%s/g, () => args[argIndex++]));
      error.name = 'Invariant Violation';
    }

    error.framesToPop = 1; // we don't care about invariant's own frame
    throw error;
  }
}

export default invariant;