how to find newly added or removed values of array in javascript code example

Example 1: remove a particular element from array

var colors = ["red","blue","car","green"];
var carIndex = colors.indexOf("car");//get  "car" index
//remove car from the colors array
colors.splice(carIndex, 1); // colors = ["red","blue","green"]

Example 2: javascript array remove

// - - - - - - - - - - -
// Remove Last Element (pop)
// - - - - - - - - - - -
// example (remove the last element in the array)
let yourArray = ["aaa", "bbb", "ccc", "ddd"];
yourArray.pop(); // yourArray = ["aaa", "bbb", "ccc"]

// syntax:
// <array-name>.pop();

// - - - - - - - - - - -
// Remove First Element (shift)
// - - - - - - - - - - -
// example (remove the last element in the array)
let yourArray = ["aaa", "bbb", "ccc", "ddd"];
yourArray.shift(); // yourArray = ["bbb", "ccc", "ddd"]

// syntax:
// <array-name>.shift();