DataView

Baseline *

20157

DataView ArrayBuffer

DataView WebAssembly DataView WebAssembly.Memory

const littleEndian = (() => {
  const buffer = new ArrayBuffer(2);
  new DataView(buffer).setInt16(0, 256, true /*  */);
  // Int16Array 
  return new Int16Array(buffer)[0] === 256;
})();
console.log(littleEndian); // true  false

: DataView

DataView(): DataView

DataView.prototype DataView

DataView.prototype.buffer: DataView ArrayBuffer
DataView.prototype.byteLength: DataView
DataView.prototype.byteOffset: ArrayBuffer DataView
DataView.prototype.constructor: DataView DataView
DataView.prototype[Symbol.toStringTag]: [Symbol.toStringTag] "DataView" Object.prototype.toString()

DataView.prototype.getBigInt64(): DataView 8 64
DataView.prototype.getBigUint64(): DataView 8 64
DataView.prototype.getFloat16(): DataView 2 16
DataView.prototype.getFloat32(): DataView 4 32
DataView.prototype.getFloat64(): DataView 8 64
DataView.prototype.getInt16(): DataView 2 16
DataView.prototype.getInt32(): DataView 4 32
DataView.prototype.getInt8(): DataView 1 8
DataView.prototype.getUint16(): DataView 2 16
DataView.prototype.getUint32(): DataView 4 32
DataView.prototype.getUint8(): DataView 1 8
DataView.prototype.setBigInt64(): 64 DataView 8
DataView.prototype.setBigUint64(): 64 DataView 8
DataView.prototype.setFloat16(): 16 DataView 2
DataView.prototype.setFloat32(): 32 DataView 4
DataView.prototype.setFloat64(): 64 DataView 8
DataView.prototype.setInt16(): 16 DataView 2
DataView.prototype.setInt32(): 32 DataView 4
DataView.prototype.setInt8(): 8 DataView 1
DataView.prototype.setUint16(): 16 DataView 2
DataView.prototype.setUint32(): 32 DataView 4
DataView.prototype.setUint8(): 8 DataView 1

DataView

const buffer = new ArrayBuffer(16);
const view = new DataView(buffer, 0);

view.setInt16(1, 42);
view.getInt16(1); // 42


ECMAScript 2027 LanguageSpecification # sec-dataview-objects

MDN

MDN 202632

GitHub