JSFiddle - React, Tailwind, and code Playground

JavaScript

function sum(value){
  var total = 0;
  var array = value.split(",").map(Number);
  for( var i = 0; i < array.length; i++) {
     total += array[i];
  }
  alert(total);
}
var value = "10|20|30|40".replace(/\|/g, ',');

console.log(sum(value));