Value to safe integer

OSCC · JavaScript, Math · Oct 22, 2020

Converts a value to a safe integer.

• Use Math.max() and Math.min() to find the closest safe value.
• Use Math.round() to convert to an integer.

const toSafeInteger = num =>
  Math.round(
    Math.max(Math.min(num, Number.MAX_SAFE_INTEGER), Number.MIN_SAFE_INTEGER)
  );

toSafeInteger('3.2'); // 3
toSafeInteger(Infinity); // 9007199254740991

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