DataView.prototype.setInt8()
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2015年7月.
setInt8() 从 DataView 起始位置以 byte 为计数的指定偏移量 (byteOffset) 处储存一个 8-bit 数 (一个字节)。
尝试一下
// Create an ArrayBuffer with a size in bytes
const buffer = new ArrayBuffer(16);
const view = new DataView(buffer);
view.setInt8(1, 127); // Max signed 8-bit integer
console.log(view.getInt8(1));
// Expected output: 127
语法
dataview.setInt8(byteOffset, value)
参数
- byteOffset
-
偏移量，从头开始计算，单位为字节
- value
-
设置的整数值
返回
抛出的错误
RangeError-
如果 byteOffset 超出了视图能储存的值，就会抛出错误
示例
js
var buffer = new ArrayBuffer(8);
var dataview = new DataView(buffer);
dataview.setInt8(1, 3);
dataview.getInt8(1); // 3
规范
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-dataview.prototype.setint8 |
浏览器兼容性
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