Function getSupportedInputTypes

src/cdk/platform/features/input-types.ts:43–66

()

/** @returns The input types supported by this browser. */
export function getSupportedInputTypes(): Set<string> {
  // Result is cached.
  if (supportedInputTypes) {
    return supportedInputTypes;
  }

  // We can't check if an input type is not supported until we're on the browser, so say that
  // everything is supported when not on the browser. We don't use `Platform` here since it's
  // just a helper function and can't inject it.
  if (typeof document !== 'object' || !document) {
    supportedInputTypes = new Set(candidateInputTypes);
    return supportedInputTypes;
  }

  let featureTestInput = document.createElement('input');
  supportedInputTypes = new Set(
    candidateInputTypes.filter(value => {
      featureTestInput.setAttribute('type', value);
      return featureTestInput.type === value;
    }),
  );

  return supportedInputTypes;
}