Variable isSafeInt`Const`

isSafeInt: (a: number) => a is SafeInt = is

Type guard that checks if a value is a safe integer.

A safe integer is an integer that can be exactly represented in JavaScript without precision loss. The range is [±(2^53 - 1)].

Type Declaration

- (a: number): a is SafeInt
- Parameters
  - a: number
  Returns a is SafeInt
  true if the value is a safe integer, false otherwise

Example

assert.ok(isSafeInt(Number.MAX_SAFE_INTEGER));
assert.notOk(isSafeInt(Number.MAX_SAFE_INTEGER + 0.5));
assert.ok(SafeInt.is(Number.MIN_SAFE_INTEGER));