30秒学会 JavaScript 片段 – toSafeInteger

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.

代码片段

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

使用样例

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