Best way to prevent/handle divide by 0 in javascript

Question

What is the best way to prevent divide by 0 in javascript that is accepting user inputs. If there is no particular way to achieve this what would be the best way to handle s

Answer 1

what would be the best way to handle such a situation so as to not prevent other scripts from executing

Division by zero doesn't seem to prevent other scripts from execution in JavaScript:

var a = 20;
var b = 0;
var result = a/b;
console.log(result); // returns Infinity

If you want something different to happen in case of division by zero, you could use

function divideIfNotZero(numerator, denominator) {
  if (denominator === 0 || isNaN(denominator)) {
        return null;
  }
  else {
        return numerator / denominator;
  }
}

Answer 2

To prevent (unwanted) execution

1. Always verify critical user input and/or results
2. Use logic and/or callbacks you can prevent to execute
3. On HTML forms etc. you can use i.e. return false; as value to stop submission.