Function validateAllowResizableArrayBuffer

lib/internal/webidl.js:920–930

* Validates the [AllowResizable] constraint for resizable ArrayBuffer. * @param {boolean} resizable ArrayBuffer [[ArrayBufferResizable]] value. * @param {ConversionOptions} options Conversion options. * @returns {void}

(resizable, options)

 * @returns {void}
 */
function validateAllowResizableArrayBuffer(resizable, options) {
  // ArrayBuffer and ArrayBufferView conversion step 3:
  // IsFixedLengthArrayBuffer(buffer) must be true without [AllowResizable].
  // Read [[ArrayBufferResizable]] first so fixed buffers skip the options
  // property lookup on this hot path.
  if (resizable && !options.allowResizable) {
    throw makeException(
      'is backed by a resizable ArrayBuffer, which is not allowed.',
      options);
  }
}

/**
 * Converts a JavaScript value to the IDL Uint8Array type.