在此页

• 句法
• 描述
• Polyfill
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

fill() method fills all the elements of a typed array from a start index to an end index with a static value. This method has the same algorithm as Array.prototype.fill() . TypedArray is one of the typed array types here.

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

句法

typedarray.fill(value[, start = 0[, end = this.length]])
					

参数

value

Value to fill the typed array with.

start

Optional. Start index. Defaults to 0.

end

Optional. End index (not included). Defaults to this.length.

返回值

The modified array.

描述

The elements interval to fill is [ start , end ).

fill method takes up to three arguments value , start and end 。 start and end arguments are optional with default values of 0 和 length of the this 对象。

若 start is negative, it is treated as length+start where length is the length of the array. If end is negative, it is treated as length+end .

Polyfill

Since there is no global object with the name TypedArray , polyfilling must be done on an "as needed" basis. Use the following "polyfill" along with the Array.prototype.fill() polyfill.

// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.fill
if (!Uint8Array.prototype.fill) {
  Uint8Array.prototype.fill = Array.prototype.fill;
}
					

范例

Using fill

new Uint8Array([1, 2, 3]).fill(4);         // Uint8Array [4, 4, 4]
new Uint8Array([1, 2, 3]).fill(4, 1);      // Uint8Array [1, 4, 4]
new Uint8Array([1, 2, 3]).fill(4, 1, 2);   // Uint8Array [1, 4, 3]
new Uint8Array([1, 2, 3]).fill(4, 1, 1);   // Uint8Array [1, 2, 3]
new Uint8Array([1, 2, 3]).fill(4, -3, -2); // Uint8Array [4, 2, 3]
					

规范

规范
ECMAScript (ECMA-262) The definition of 'TypedArray.prototype.fill' in that specification.

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet	Node.js
fill	Chrome 45	Edge 14	Firefox 37	IE No	Opera 36	Safari No	WebView Android No	Chrome Android 45	Firefox Android 37	Opera Android No	Safari iOS No	Samsung Internet Android 5.0	nodejs 4.0.0

图例

完整支持

完整支持

不支持

不支持

另请参阅

• Array.prototype.fill()

元数据

• 最后修改： May 20, 2020

相关话题

1. 标准内置对象
2. TypedArray
3. 特性
   1. TypedArray.BYTES_PER_ELEMENT
   2. TypedArray.name
   3. TypedArray.prototype.buffer
   4. TypedArray.prototype.byteLength
   5. TypedArray.prototype.byteOffset
   6. TypedArray.prototype.length
   7. 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.reduce()
   18. TypedArray.prototype.reduceRight()
   19. TypedArray.prototype.reverse()
   20. TypedArray.prototype.set()
   21. TypedArray.prototype.slice()
   22. TypedArray.prototype.some()
   23. TypedArray.prototype.sort()
   24. TypedArray.prototype.subarray()
   25. TypedArray.prototype.toLocaleString()
   26. TypedArray.prototype.toString()
   27. TypedArray.prototype.values()
   28. TypedArray.prototype[@@iterator]()
5. 相关页面：
6. Int8Array
7. Uint8Array
8. Uint8ClampedArray
9. Int16Array
10. Uint16Array
11. Int32Array
12. Uint32Array
13. Float32Array
14. Float64Array
15. BigInt64Array
16. BigUint64Array
17. 继承：
18. Function
19. 特性
    1. Function.arguments
    2. Function.caller
    3. Function.displayName
    4. Function.length
    5. Function.name
20. 方法
    1. Function.prototype.apply()
    2. Function.prototype.bind()
    3. Function.prototype.call()
    4. Function.prototype.toSource()
    5. Function.prototype.toString()
21. Object
22. 特性
    1. Object.prototype.__proto__
    2. Object.prototype.constructor
23. 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.valueOf()
    12. Object.setPrototypeOf()