Answers for "save and update array to local storage js"

localstorage save array

var names = [];
names[0] = prompt("New member name?");
localStorage.setItem("names", JSON.stringify(names));

//...
var storedNames = JSON.parse(localStorage.getItem("names"));

how-to-save-array in Local storage - js

// our array
var movies = ["Reservoir Dogs", "Pulp Fiction", "Jackie Brown", 
"Kill Bill", "Death Proof", "Inglourious Basterds"];
 
// storing our array as a string
localStorage.setItem("quentinTarantino", JSON.stringify(movies));
 
// retrieving our data and converting it back into an array
var retrievedData = localStorage.getItem("quentinTarantino");
var movies2 = JSON.parse(retrievedData);
 
//making sure it still is an array
alert(movies2.length);

javascript update local storage array

var yesArray = [];
localStorage.setItem('yesArray', JSON.stringify(yesArray));
yesArray = JSON.parse(localStorage.getItem('yesArray'));
yesArray.push('yes');
localStorage.setItem('yesArray', JSON.stringify(yesArray));
JSON.parse(localStorage.getItem('yesArray')); // Returns ["yes"]