Checking Numerical Values in Pure JavaScript: A jQuery isNumeric() Equivalent

In contrast to jQuery's isNumeric() function for testing numeric integrity, pure JavaScript lacks a direct equivalent. However, you can create a custom isNumeric() function to fill this void:

function isNumeric(n) {
  return !isNaN(parseFloat(n)) && isFinite(n);
}

This function combines the parseFloat() and isFinite() methods to accurately determine the numeric nature of values.

Cautionary Note

Avoid using parseInt() to check for numerics, as it's not a reliable method due to its potential to convert non-numeric strings (e.g., "12px") to numerical values.