how to unshift in javascript code example

Example 1: javascript prepend string to array

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

names.unshift("Alex")

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

Example 2: javascript unshift

let array = ["A", "B"];
 let variable = "what you want to add";

//Add the variable to the beginning of the array
 array.unshift(variable);

//===========================
 console.log(array);
//output =>
//["what you want to add" ,"A", "B"]