簡約而功能齊全的ES6方法：

const setCookie = (name, value, days = 7, path = '/') => { const expires = new Date(Date.now() + days * 864e5).toUTCString() document.cookie = name + '=' + encodeURIComponent(value) + '; expires=' + expires + '; path=' + path } const getCookie = (name) => { return document.cookie.split('; ').reduce((r, v) => { const parts = v.split('=') return parts[0] === name ? decodeURIComponent(parts[1]) : r }, '') } const deleteCookie = (name, path) => { setCookie(name, '', -1, path) }

這裡是用來建立和取得cookie的函數。

function createCookie(name, value, days) { var expires; if (days) { var date = new Date(); date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000)); expires = "; expires=" + date.toGMTString(); } else { expires = ""; } document.cookie = name + "=" + value + expires + "; path=/"; } function getCookie(c_name) { if (document.cookie.length > 0) { c_start = document.cookie.indexOf(c_name + "="); if (c_start != -1) { c_start = c_start + c_name.length + 1; c_end = document.cookie.indexOf(";", c_start); if (c_end == -1) { c_end = document.cookie.length; } return unescape(document.cookie.substring(c_start, c_end)); } } return ""; }