prepend to array js code example

Example 1: javascript prepend string to array

const names = ["Bob", "Cassandra"]

names.unshift("Alex")

names === ["Alex", "Bob", "Cassandra"]

Example 2: javascript prepend element to array

var a = [1, 2, 3, 4];
a.unshift(0);
a; // => [0, 1, 2, 3, 4]