localStorage

localStorage.js

function localStorageSupport() {
    try {
        return ('localStorage' in window && window['localStorage'] !== null)
    } catch(e) {
        console.log(e.stack);
    }
    return false;
}

function addData(key, data) {
    if(localStorageSupport()) {
        localStorage.setItem(key, data);
    }
}

function getData(key) {
    if(localStorageSupport()){
        return localStorage.getItem(key);
    }
}

function removeData(key) {
    if(localStorageSupport()) {
        localStorage.removeItem(key);
    }
}

function clearData() {
    localStorage.clear();
}

function getLength() {
    return localStorage.length;
}