DataView.prototype.setInt32
Stores a signed 32-bit integer at the specified byte offset from the start of the DataView
Syntax
dataView.setInt32(byteOffset, value, littleEndian?)Parameters
| Parameter | Type | Description |
|---|---|---|
| byteOffset | number | The offset in bytes to write at |
| value | number | The value to set |
| littleEndian | boolean | If true, store as little-endian |
Return Value
undefined
Examples
const buffer = new ArrayBuffer(4)
const view = new DataView(buffer)
view.setInt32(0, 42)
console.log(new Uint8Array(buffer)) // [0, 0, 0, 42]const buffer = new ArrayBuffer(8)
const view = new DataView(buffer)
view.setInt32(0, 1000, true) // little-endian
view.setInt32(4, 2000, true)
console.log(view.getInt32(0, true), view.getInt32(4, true))function writeHeader(buffer: ArrayBuffer, magic: number, version: number) {
const view = new DataView(buffer)
view.setInt32(0, magic)
view.setInt32(4, version)
}Understanding DataView.prototype.setInt32
The DataView.prototype.setInt32 method in JavaScript stores a signed 32-bit integer at the specified byte offset from the start of the DataView. It belongs to the DataView object and is one of the most widely used methods for working with dataview values in modern JavaScript and TypeScript applications.
The method signature is dataView.setInt32(byteOffset, value, littleEndian?). It accepts 3 parameters: byteOffset, value, littleEndian. When called, it returns undefined. Understanding when and how to use setInt32() helps you write more expressive, readable code.
Common use cases for DataView.prototype.setInt32 include data transformation, input validation, API response processing, and building reusable utility functions. It works well alongside related methods like dataview-getint32, dataview-constructor, dataview-getuint32, enabling you to chain operations together for complex data manipulation pipelines.
Browser support for DataView.prototype.setInt32 is excellent across all modern browsers including Chrome, Firefox, Safari, and Edge. It is also fully supported in Node.js and Deno. For older environments, transpilation with Babel or a polyfill may be needed.
Browser Compatibility
Supported in all modern browsers (Chrome, Firefox, Safari, Edge) and Node.js. Part of the ECMAScript standard.
Related Methods
DataView.prototype.getInt32Gets a signed 32-bit integer at the specified byte offset from the start of the DataView
DataViewCreates a new DataView providing a low-level interface for reading and writing multiple number types in an ArrayBuffer
DataView.prototype.getUint32Gets an unsigned 32-bit integer at the specified byte offset from the start of the DataView
More DataView Methods
Other methods in the DataView object
Related Tools
More DataView Methods
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