Remove Last Comma from a string

Question

Using JavaScript, how can I remove the last comma, but only if the comma is the last character or if there is only white space after the comma? This is my code. I got a wor

Answer 1

Remove last comma. Working example

function truncateText() {
  var str= document.getElementById('input').value;
  str = str.replace(/,\s*$/, "");
  console.log(str);
}

Truncate