JavaScript: Number.isSafeInteger
Number.isSafeInteger(number)
-
If number is a integer and its absolute value is ≤ 2^53-1, returns
true
. Else,false
.
const n = Math.pow (2, 53) -1; console.log( Number.isSafeInteger (n) ); // true console.log( Number.isSafeInteger (n+1) ); // false
console.log( Number.isSafeInteger ( 3.0 ) ); // true console.log( Number.isSafeInteger( NaN) ); // false console.log( Number.isSafeInteger( Infinity) ); // false console.log( Number.isSafeInteger ([]) ); // false