Javascript / Nodejs check if something is bigint type?

Question

Is there a way to check if something is bigint type?

I would like to check this:

99999999999999999999999999999999999999999999999999

I know this number can't be represented as an Integer. How can I check if it can be represented as a bigint?

If I use the typeof on it, it says number.

Also is there any way to specify a type with a decimal at the end?

example: 99999999999999999999999999999999999999999999999999.99

Answer 1

You can use Number.MAX_SAFE_INTEGER to check if is a bigint or not. Link below: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER

or a better way: Number.isSafeInteger() https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isSafeInteger