const getItem = key => { let ca = document.cookie.split('; '); for (let i = 0; i < ca.length; i++) { let item = ca[i].split('='); if (item[0] === key) { return item[1]; } } return ''; } const setItem = (key, value, second = 86400) => { let d = new Date(); d.setTime(d.getTime() + (second * 1000)) let expires = 'expires=' + d.toUTCString(); document.cookie = key + '=' + value + ';' + expires; } const deleteItem = key => { setItem(key, '', -1) }