监听事件——浏览器关闭的时候清空用户信息

为了保护用户信息，在他关闭浏览器的时候清除用户的登陆缓存信息

当初遇到这个问题  想了四种方法  总有一种你可以用的

放到<script></script>里边呦~

方法一：

window.onbeforeunload = onbeforeunload_handler;
window.onunload = onunload_handler;
function clearAllCookie() {
alert(1)
var keys = document.cookie.match(/[^ =;]+(?==)/g);
console.log(keys,'---');
if(keys) {
for(var i = keys.length; i--;)
document.cookie = keys[i] + '=0;expires=' + new Date(0).toUTCString()
}
}

function onbeforeunload_handler(){
clearAllCookie()

var warning="确认退出?";
return warning;
}

方法二：

<script>
window.onbeforeunload = onbeforeunload_handler;
function clearAllCookie() {
alert(1)
var keys = document.cookie.match(/[^ =;]+(?==)/g);
console.log(keys,'---');
if(keys) {
for(var i = keys.length; i--;)
document.cookie = keys[i] + '=0;expires=' + new Date(0).toUTCString()
}
}

function onbeforeunload_handler(){
clearAllCookie()

var warning="确认退出?";
return warning;
}
</script>

方法三：

<script>
function clearAllCookie() {
var keys = document.cookie.match(/[^ =;]+(?==)/g);
console.log(keys,'---');
if(keys) {
for(var i = keys.length; i--;)
document.cookie = keys[i] + '=0;expires=' + new Date(0).toUTCString()
}
}
clearAllCookie()
</script>

方法四：

function onbeforeunload_handler(){
var keys = document.cookie.match(/[^ =;]+(?==)/g);
console.log(keys,'---');
if(keys) {
for(var i = keys.length; i--;)
document.cookie = keys[i] + '=0;expires=' + new Date(0).toUTCString()
}

var warning="确认退出?";
return warning;
}