如下是简单cookie操作，当前仅限前端实例
要注意的有两点：
1、cookie内容存贮的名称
2、删除cookie是通过设置过期为过去时间实现的
<body>
<div id="app">
<button @click="clearCookie()">
清除cookie
</button>
</div>
</body>
<script>
let app = new Vue({
el: "#app",
data: {
},
created: function () {
this.checkCookie();
},
methods: {
//设置cookie
setCookie: function (cname, cvalue, exdays) {
var d = new Date();
d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));
var expires = "expires=" + d.toUTCString();
console.info(cname + "=" + cvalue + "; " + expires);
document.cookie = cname + "=" + cvalue + "; " + expires;
console.info(document.cookie);
},
//获取cookie
getCookie: function (cname) {
var name = cname + "=";
var ca = document.cookie.split(';');
for (var i = 0; i < ca.length; i++) {
var c = ca[i];
while (c.charAt(0) == ' ') c = c.substring(1);
if (c.indexOf(name) != -1) return c.substring(name.length, c.length);
}
return "";
},
//清除cookie
clearCookie: function () {
this.setCookie("username", "", -1);
},
checkCookie: function () {
var user = this.getCookie("username");
if (user != "") {
alert("Welcome again " + user);
} else {
user = prompt("Please enter your name:", "");
if (user != "" && user != null) {
this.setCookie("username", user, 365);
}
}
}
}
})
</script>
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