Answers for "how do you retrieve all data from localstorage in javascript"

get localstorage

function get(){
    var getJson = localStorage.getItem('key')
    if(getJson){
        arrayName = JSON.parse(getJson)
    }
}

javascript get local storage

var Item = localStorage.getItem('youritem');

how to get data from localstorage in javascript

//localStorage is an object, so values are stored by key name
//data from localStorage is always stored in strings
//usually the values at each key are stringified objects in JSON format, therefore we must parse them
var data = JSON.parse(localStorage.getItem("key name"));//make sure the "key name" exists in the localStorage