TypedArray.prototype.byteOffset

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

TypedArray 实例的 byteOffset 访问器属性返回此类型化数组相对于其 ArrayBuffer 或 SharedArrayBuffer 开头的偏移量（以字节为单位）。

¥The byteOffset accessor property of TypedArray instances returns the offset (in bytes) of this typed array from the start of its ArrayBuffer or SharedArrayBuffer.

描述

¥Description

byteOffset 属性是一个访问器属性，其设置的访问器函数为 undefined，这意味着你只能读取该属性。该值是在构造 TypedArray 时确定的，并且无法更改。TypedArray 是 类型数组对象.1 之一。

¥The byteOffset property is an accessor property whose set accessor function is undefined, meaning that you can only read this property. The value is established when a TypedArray is constructed and cannot be changed. TypedArray is one of the TypedArray objects.

示例

¥Examples

使用 byteOffset 属性

¥Using the byteOffset property

js
const buffer = new ArrayBuffer(8);

const uint8array1 = new Uint8Array(buffer);
uint8array1.byteOffset; // 0 (no offset specified)

const uint8array2 = new Uint8Array(buffer, 3);
uint8array2.byteOffset; // 3 (as specified when constructing Uint8Array)

规范

Specification
ECMAScript Language Specification
# sec-get-%typedarray%.prototype.byteoffset

¥Specifications

浏览器兼容性

BCD tables only load in the browser

¥Browser compatibility

也可以看看

¥See also