Can anyone please tell me the exact difference between currentTarget and target property in Javascript events with example and which property is used in which scenario?

/*! * Add a new item to an object * (c) 2018 Chris Ferdinandi, MIT License, https://gomakethings.com * @param {Object} obj The original object * @param {String} key The key for the item to add * @param {Any} value The value for the new key to add * @param {Number} index The position in the object to add the new key/value pair [optional] * @return {Object} An immutable clone of the original object, with the new key/value pair added */ var addToObject = function (obj, key, value, index) { // Create a temp object and index variable
var temp = {}; var i = 0; // Loop through the original object
for (var prop in obj) { if (obj.