isNaN_2() function
This API is provided as a preview for developers and may change based on feedback that we receive. Do not use this API in a production environment.
该函数检查值是否为 NaN。
Signature:
typescript
declare function isNaN(value: any): boolean;declare function isNaN(value: any): boolean;Parameters
| Parameter | Type | Description |
|---|---|---|
| value | any | value 参数可以是任何数据类型，例如数字、字符串或对象。 |
Returns:
boolean
{boolean} - 一个布尔值，指示给定值是否为 NaN（非数字）。
Example
JavaScript
let str = 'ad1'; isNaN(str) // true
let n = 1; isNaN(n) // false let str = 'ad1'; isNaN(str) // true
let n = 1; isNaN(n) // false