[ Web Proxy ]
URL:
Viewing: https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Float32Array [Back]  [Original]
Float32Array - JavaScript | MDN
HTML

HTML: Markup language

HTML reference
HTML guides
Markup languages
CSS

CSS: Styling language

CSS reference
CSS guides
Layout cookbook
JavaScriptJS

JavaScript: Scripting language

JS reference
JS guides
Web APIs

Web APIs: Programming interfaces

Web API reference
Web API guides
All

All web technology

Technologies
Topics
Learn

Learn web development

Frontend developer course
Learn HTML
Learn CSS
Learn JavaScript
Tools

Discover our tools

About

Get to know MDN better

Blog
  1. Web
  2. JavaScript
  3. JavaScript
  4. JavaScript
  5. Float32Array
()

MDN Web Docs

View in English Always switch to English

Float32Array

20157

Float32Array 32 ( C ) DataView 0 ()

new Float32Array(length);
new Float32Array(typedArray);
new Float32Array(object);
new Float32Array(buffer [, byteOffset [, length]]);

TypedArray

Float32Array.BYTES_PER_ELEMENT

Float32Array 4

Float32Array.length

3 () Float32Array.prototype.length

Float32Array.prototype

TypedArray

Float32Array.from()

Float32Array Array.from()

Float32Array.of()

Float32Array Array.of()

TypedArray

Float32Array.prototype.constructor

Float32Array

Float32Array.prototype.buffer

Float32Array ArrayBuffer

Float32Array.prototype.byteLength

Float32Array ArrayBuffer ()

Float32Array.prototype.byteOffset

Float32Array ArrayBuffer

Float32Array.prototype.length

Float32Array

TypedArray

js
// From a length
var float32 = new Float32Array(2);
float32[0] = 42;
console.log(float32[0]); // 42
console.log(float32.length); // 2
console.log(float32.BYTES_PER_ELEMENT); // 4

// From an array
var arr = new Float32Array([21, 31]);
console.log(arr[1]); // 31

// From another TypedArray
var x = new Float32Array([21, 31]);
var y = new Float32Array(x);
console.log(y[0]); // 21

// From an ArrayBuffer
var buffer = new ArrayBuffer(16);
var z = new Float32Array(buffer, 0, 4);

ECMAScript 2027 LanguageSpecification
# sec-typedarray-objects

ECMAScript 2015 (ES6) Float32ArraynewFloat32Array newTypeError

js
var dv = Float32Array([1, 2, 3]);
// TypeError: calling a builtin Float32Array constructor
//  new
js
var dv = new Float32Array([1, 2, 3]);

MDN

2026526 MDN

GitHub
  1. JavaScript
  2. Float32Array
    1. Float32Array()
  5. TypedArray
    1. TypedArray.from()
    2. TypedArray.of()
    1. TypedArray.BYTES_PER_ELEMENT
    2. TypedArray[Symbol.species]
    1. at()
    2. TypedArray.prototype.copyWithin()
    3. TypedArray.prototype.entries()
    4. TypedArray.prototype.every()
    5. TypedArray.prototype.fill()
    6. TypedArray.prototype.filter()
    7. TypedArray.prototype.find()
    8. TypedArray.prototype.findIndex()
    9. findLast()
    10. findLastIndex()
    11. TypedArray.prototype.forEach()
    12. TypedArray.prototype.includes()
    13. TypedArray.prototype.indexOf()
    14. TypedArray.prototype.join()
    15. TypedArray.prototype.keys()
    16. TypedArray.prototype.lastIndexOf()
    17. TypedArray.prototype.map()
    18. TypedArray.prototype.reduce()
    19. TypedArray.prototype.reduceRight()
    20. TypedArray.prototype.reverse()
    21. set()
    22. slice()
    23. TypedArray.prototype.some()
    24. TypedArray.prototype.sort()
    25. TypedArray.prototype.subarray()
    26. TypedArray.prototype.toLocaleString()
    27. toReversed()
    28. TypedArray.prototype.toSorted()
    29. toString()
    30. TypedArray.prototype.values()
    31. TypedArray.prototype.with()
    32. TypedArray.prototype[Symbol.iterator]()
    1. TypedArray.prototype.buffer
    2. TypedArray.prototype.byteLength
    3. TypedArray.prototype.byteOffset
    4. TypedArray.prototype.length
  10. Object/Function
    1. Function.prototype.apply()
    2. Function.prototype.bind()
    3. Function.prototype.call()
    4. Function.prototype.toString()
    5. Function.prototype[Symbol.hasInstance]()
    1. Function.displayName
    2. Functionlength
    3. Function.name
    4. Function.prototype.prototype
    5. Function.prototype.arguments
    6. Function.prototype.caller
    1. Object.prototype.__defineGetter__()
    2. Object.prototype.__defineSetter__()
    3. Object.prototype.__lookupGetter__()
    4. Object.prototype.__lookupSetter__()
    5. Object.prototype.hasOwnProperty()
    6. Object.prototype.isPrototypeOf()
    7. Object.prototype.propertyIsEnumerable()
    8. Object.prototype.toLocaleString()
    9. Object.prototype.toString()
    10. Object.prototype.valueOf()
    1. Object.prototype.__proto__
    2. Object.prototype.constructor
  16. BigInt64Array
  17. BigUint64Array
  18. Float16Array
  19. Float64Array
  20. Int8Array
  21. Int16Array
  22. Int32Array
  23. Uint8Array
  24. Uint8ClampedArray
  25. Uint16Array
  26. Uint32Array
MDN

MDN
Mozilla

mozilla.org 19982026

Web Proxy Viewer  |  New URL  |  Original Page