TypedArray.prototype.includes()

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2016.

TypedArray 实例的 includes() 方法确定类型化数组的条目中是否包含某个值，并根据需要返回 true 或 false。该方法与 Array.prototype.includes() 的算法相同。

¥The includes() method of TypedArray instances determines whether a typed array includes a certain value among its entries, returning true or false as appropriate. This method has the same algorithm as Array.prototype.includes().

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语法

¥Syntax

js
includes(searchElement)
includes(searchElement, fromIndex)

参数

¥Parameters

searchElement

要搜索的值。

fromIndex Optional

开始搜索的从零开始的索引，转换为整数。

返回值

¥Return value

如果在类型化数组（或由索引 fromIndex 指示的类型化数组的一部分，如果指定）中找到值 searchElement，则为 true 的布尔值。

¥A boolean value which is true if the value searchElement is found within the typed array (or the part of the typed array indicated by the index fromIndex, if specified).

描述

¥Description

详细信息请参见 Array.prototype.includes()。此方法不是通用的，只能在类型化数组实例上调用。

¥See Array.prototype.includes() for more details. This method is not generic and can only be called on typed array instances.

示例

¥Examples

使用包含（）

¥Using includes()

js
const uint8 = new Uint8Array([1, 2, 3]);
uint8.includes(2); // true
uint8.includes(4); // false
uint8.includes(3, 3); // false

// NaN handling (only relevant for floating point arrays)
new Uint8Array([NaN]).includes(NaN); // false, since the NaN passed to the constructor gets converted to 0
new Float32Array([NaN]).includes(NaN); // true

规范

Specification
ECMAScript Language Specification
# sec-%typedarray%.prototype.includes

¥Specifications

浏览器兼容性

BCD tables only load in the browser

¥Browser compatibility

也可以看看

¥See also