isArray

Functions to check the type of value if it's array or array-like.

isArray function

function isArray(value: unknown): boolean

Checks if the passed value is an Array. It does not check the value's prototype chain, nor does it rely on the Array constructor it is attached to. It returns true for any value that was created using the array literal syntax ([...]) or the Array constructor.

Parameters

• value: unknown The value to be checked.

Return boolean

true if value is an Array; otherwise, false. false is always returned if value is a TypedArray instance.

isArrayLike function

function isArrayLike(value: unknown): boolean

Checks if the passed value is array-like. A value is considered array-like if it's not a function and has a value.length that's an integer greater than or equal to 0 and less than or equal to Number.MAX_SAFE_INTEGER.

Parameters

• value: unknown The value to check.

Return boolean

true if value has a valid length, otherwise false.