Resizable ArrayBuffer

src/_util/is.mjs

@@ -1,5 +1,6 @@
 import {
   ArrayBufferPrototypeGetByteLength,
+  ArrayBufferPrototypeGetResizable,
   ArrayIsArray,
   ArrayIteratorPrototype,
   ArrayIteratorPrototypeNext,
@@ -15,7 +16,7 @@
 
 /**
  * @param {unknown} value
  * @returns {value is {}}
  */
 export function isObject(value) {
   return (
@@ -26,7 +27,7 @@
 
 /**
  * @param {unknown} value
  * @returns {value is {}}
  */
 export function isObjectLike(value) {
   return value !== null && typeof value === "object";
@@ -65,7 +66,7 @@
     if (ArrayIsArray(value)) {
       return false;
     }
     ArrayBufferPrototypeGetByteLength(/** @type {any} */ (value));
     return true;
   } catch (e) {
     return false;
@@ -82,7 +83,7 @@
   }
 
   try {
     SharedArrayBufferPrototypeGetByteLength(/** @type {any} */ (value));
     return true;
   } catch (e) {
     return false;
@@ -97,6 +98,22 @@
   return isArrayBuffer(value) || isSharedArrayBuffer(value);
 }
 
+/**
+ * @param {unknown} value
+ * @returns {boolean}
+ */
+export function isResizableArrayBuffer(value) {
+  if (ArrayBufferPrototypeGetResizable === null) {
+    return false;
+  }
+
+  try {
+    return ArrayBufferPrototypeGetResizable(/** @type {any} */ (value));
+  } catch (e) {
+    return false;
+  }
+}
+
 /**
  * @param {unknown} value
  * @returns {value is unknown[]}

src/_util/primordials.mjs

@@ -3,7 +3,7 @@
 
 import { CANNOT_CONVERT_UNDEFINED_OR_NULL_TO_OBJECT } from "./messages.mjs";
 
 /** @type {<T extends (...args: any) => any>(target: T) => (thisArg: ThisType<T>, ...args: any[]) => any} */
 function uncurryThis(target) {
   return (thisArg, ...args) => {
     return ReflectApply(target, thisArg, args);
@@ -118,6 +118,9 @@
 export const ArrayBufferPrototypeSlice = uncurryThis(ArrayBufferPrototype.slice);
 /** @type {(buffer: ArrayBuffer) => ArrayBuffer} */
 export const ArrayBufferPrototypeGetByteLength = uncurryThisGetter(ArrayBufferPrototype, "byteLength");
+/** @type {null | ((buffer: ArrayBuffer) => boolean)} */
+export const ArrayBufferPrototypeGetResizable = typeof ArrayBufferPrototype["resize"] !== "undefined" ?
+  uncurryThisGetter(ArrayBufferPrototype, "resizable") : null;
 
 // SharedArrayBuffer
 export const NativeSharedArrayBuffer = typeof SharedArrayBuffer !== "undefined" ? SharedArrayBuffer : null;