Function: isDate()

function isDate(value): value is Date;

Checks if a value is a Date object. 检查值是否为Date对象。

Parameters

Parameter	Type	Description
value	unknown	The value to check / 要检查的值

Returns

value is Date

True if the value is a Date object / 如果值是Date对象则返回true

Example

isDate(new Date()) // => true
isDate(new Date('2023-01-01')) // => true
isDate(new Date(Date.now())) // => true
isDate(Date.now()) // => false (number timestamp)
isDate('2022-03-30') // => false
isDate(1640995200000) // => false
isDate({}) // => false
isDate(null) // => false
isDate(undefined) // => false

// Note: Invalid dates are still Date objects
isDate(new Date('invalid')) // => true

Since

1.0.0