DataView.prototype.getInt32()
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.
getInt32()
方法从 DataView
相对于起始位置偏移 n 个字节处开始,获取一个 32-bit 数 (长整型,4 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.setInt32(1, 2147483647); // Max signed 32-bit integer
console.log(view.getInt32(1));
// Expected output: 2147483647
语法
dataview.getInt32(byteOffset [, littleEndian])
参数
- byteOffset
-
偏移量,单位为字节,从头开始计算。
- littleEndian
-
可选 Indicates whether the 32-bit int is stored in little- or big-endian format. If false or undefined, a big-endian value is read.
返回
一个长整型 32 位数。
抛出错误
RangeError
-
如果 byteOffset 超出了视图能储存的值,就会抛出错误。
描述
没有对齐约束; 多字节值可以从任何偏移量获取。
示例
js
var buffer = new ArrayBuffer(8);
var dataview = new DataView(buffer);
dataview.getInt32(1); // 0
规范
Specification |
---|
ECMAScript® 2025 Language Specification # sec-dataview.prototype.getint32 |
浏览器兼容性
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getInt32 |
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- Full support
- Full support
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