Cookie的用法
设置cookie 函数
cookie 的名字(cname),cookie 的值(cvalue),以及知道 cookie 过期的天数(exdays)
1 function setCookie(cname, cvalue, exdays) { 2 var d = new Date(); 3 d.setTime(d.getTime() + (exdays*24*60*60*1000)); 4 var expires = "expires="+ d.toUTCString(); 5 document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/"; 6 }
调用
1 setCookie('username','Bill Gates',3);
获取cookie
1 function getCookie(cname) { 2 var name = cname + "="; 3 var decodedCookie = decodeURIComponent(document.cookie); 4 var ca = decodedCookie.split(';'); 5 for(var i = 0; i <ca.length; i++) { 6 var c = ca[i]; 7 while (c.charAt(0) == ' ') { 8 c = c.substring(1); 9 } 10 if (c.indexOf(name) == 0) { 11 return c.substring(name.length, c.length); 12 } 13 } 14 return ""; 15 }
调用
1 getCookie('username')
检测cookie函数
1 function checkCookie() { 2 var username = getCookie("username"); 3 if (username != "") { 4 alert("Welcome again " + username); 5 } else { 6 username = prompt("Please enter your name:", ""); 7 if (username != "" && username != null) { 8 setCookie("username", username, 365); 9 } 10 } 11 }
cookie 进一步知识
js-cookie 插件
1.安装
1 npm install js-cookie --save
2.官方文档
https://github.com/js-cookie/js-cookie/tree/latest#readme
小凤凰newObject