30秒学会 JavaScript 片段 – Number has decimal digits

Checks if a number has any decimals digits

• Use the modulo (%) operator to check if the number is divisible by 1 and return the result.

代码实现

const hasDecimals = num => num % 1 !== 0;

hasDecimals(1); // false
hasDecimals(1.001); // true

翻译自：https://www.30secondsofcode.org/js/s/has-decimals