TypedArray.prototype.byteOffset

byteOffset 访问器属性表示类型化数组距离其ArrayBuffer起始位置的偏移（字节数）。

语法

typedarray.byteOffset

描述

byteOffset 是一个访问器属性，它的 set 访问器函数是undefined，意思是你只能够读取这个属性。它的值在TypedArray构造时建立，不能被修改。TypedArray 是这里的 TypedArray 对象之一。

示例

使用byteOffset 属性

var buffer = new ArrayBuffer(8);

var uint8 = new Uint8Array(buffer);
uint8.byteOffset; // 0 (没有指定 oddfet)

var uint8 = new Uint8Array(buffer, 3);
uint8.byteOffset; // 3 (在构造 Uint8Array 时指定)

规范

Specification Status Comment
ECMAScript 2015 (6th Edition, ECMA-262)
TypedArray.prototype.byteOffset		 Standard 初始定义。
ECMAScript Latest Draft (ECMA-262)
TypedArray.prototype.byteOffset		 Draft  

浏览器兼容性

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 7.0 4.0 (2) 10 11.6 5.1
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support 4.0 (Yes) 4.0 (2) 10 11.6 4.2

另见

  1. JavaScript 标准库
  2. TypedArray
  3. 属性
    1. TypedArray.BYTES_PER_ELEMENT
    2. TypedArray.name
    3. TypedArray.prototype
    4. TypedArray.prototype.buffer
    5. TypedArray.prototype.byteLength
    6. TypedArray.prototype.byteOffset
    7. TypedArray.prototype.length
    8. get TypedArray[@@species]
  4. 方法
    1. TypedArray.from()
    2. TypedArray.of()
    3. TypedArray.prototype.copyWithin()
    4. TypedArray.prototype.entries()
    5. TypedArray.prototype.every()
    6. TypedArray.prototype.fill()
    7. TypedArray.prototype.filter()
    8. TypedArray.prototype.find()
    9. TypedArray.prototype.findIndex()
    10. TypedArray.prototype.forEach()
    11. TypedArray.prototype.includes()
    12. TypedArray.prototype.indexOf()
    13. TypedArray.prototype.join()
    14. TypedArray.prototype.keys()
    15. TypedArray.prototype.lastIndexOf()
    16. TypedArray.prototype.map()
    17. TypedArray.prototype.move()
    18. TypedArray.prototype.reduce()
    19. TypedArray.prototype.reduceRight()
    20. TypedArray.prototype.reverse()
    21. TypedArray.prototype.set()
    22. TypedArray.prototype.slice()
    23. TypedArray.prototype.some()
    24. TypedArray.prototype.sort()
    25. TypedArray.prototype.subarray()
    26. TypedArray.prototype.toLocaleString()
    27. TypedArray.prototype.toString()
    28. TypedArray.prototype.values()
    29. TypedArray.prototype[@@iterator]()
  5. Related pages:
  6. Int8Array
  7. Uint8Array
  8. Uint8ClampedArray
  9. Int16Array
  10. Uint16Array
  11. Int32Array
  12. Uint32Array
  13. Float32Array
  14. Float64Array
  15. 继承
  16. Function
  17. 属性
    1. Function.arguments
    2. Function.arity
    3. Function.caller
    4. Function.displayName
    5. Function.length
    6. Function.prototype
    7. Function.name
  18. 方法
    1. Function.prototype.apply()
    2. Function.prototype.bind()
    3. Function.prototype.call()
    4. Function.prototype.isGenerator()
    5. Function.prototype.toSource()
    6. Function.prototype.toString()
  19. Object
  20. 属性
    1. Object.prototype.__count__
    2. Object.prototype.__noSuchMethod__
    3. Object.prototype.__parent__
    4. Object.prototype.__proto__
    5. Object.prototype.constructor
  21. 方法
    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.toSource()
    10. Object.prototype.toString()
    11. Object.prototype.unwatch()
    12. Object.prototype.valueOf()
    13. Object.prototype.watch()
    14. Object.setPrototypeOf()