main repo

node_modules/es-abstract/2024/IsFixedLengthArrayBuffer.js

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+'use strict';
+
+var $TypeError = require('es-errors/type');
+
+var callBound = require('call-bind/callBound');
+
+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
+};