includes() function

Checks if the specified value is equal.

There is another alias function called contains.

Signature:

declare function includes<T extends readonly []>(value: unknown, iterable: T): false;

Example

includes('c', 'abcd'); // true
includes('e', 'abcd'); // false
includes(3, [1,2,3,4]); // true
includes(5, [1,2,3,4]); // false

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