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"]
const array = [1, 2, 3];
const index = array.indexOf(2);
if (index > -1) {
array.splice(index, 1);
}