IsFixedLengthArrayBuffer.jsā¢957 B
'use strict';
var $TypeError = require('es-errors/type');
var callBound = require('call-bound');
var $arrayBufferResizable = callBound('%ArrayBuffer.prototype.resizable%', true);
var $sharedArrayGrowable = callBound('%SharedArrayBuffer.prototype.growable%', true);
var isArrayBuffer = require('is-array-buffer');
var isSharedArrayBuffer = require('is-shared-array-buffer');
// https://262.ecma-international.org/15.0/#sec-isfixedlengtharraybuffer
module.exports = function IsFixedLengthArrayBuffer(arrayBuffer) {
var isAB = isArrayBuffer(arrayBuffer);
var isSAB = isSharedArrayBuffer(arrayBuffer);
if (!isAB && !isSAB) {
throw new $TypeError('Assertion failed: `arrayBuffer` must be an ArrayBuffer or SharedArrayBuffer');
}
if (isAB && $arrayBufferResizable) {
return !$arrayBufferResizable(arrayBuffer); // step 1
}
if (isSAB && $sharedArrayGrowable) {
return !$sharedArrayGrowable(arrayBuffer); // step 1
}
return true; // step 2
};