JAVASCRIPT

js check if number has decimals

num % 1 != 0

how to know if a number has a decimal number js

function hasDecimal (num) {
	return !!(num % 1);
}
hasDecimal(2) // true
hasDecimal(2.345) // false

check if number is decimal or integer js

// check if number inserted in input is decimal or integer
// if integer, return the integer value,
// else set fixed limit for decimal value.
// e.g. 15.347394 => 15.347

function check(element) {
  if (Number.isInteger(element)) {
    return element;
  }
  return element.toFixed(3);
}