html实现记住账号、记住密码功能

效果图：

1.页面添加记住账号、记住密码多选框

<div class="remember" style="text-align: center;margin: 10px auto;"><input type="checkbox" id="rem_username">记住账号<input type="checkbox" id="rem_password">记住密码</div>

2.编写js，监听用户名、密码输入框id

document.querySelector用户获取单个元素，addEventListener去监听多选框是否发生改变，判断是否进行填充用户名、密码。

<script type="text/javascript">var u_name = document.querySelector('#username');var u_pass = document.querySelector('#password');var rem_username = document.querySelector('#rem_username');var rem_password = document.querySelector('#rem_password');if (localStorage.getItem('u_name')) {u_name.value = (localStorage.getItem('u_name'))rem_username.checked = true;}if (localStorage.getItem('u_pass')) {u_pass.value = (localStorage.getItem('u_pass'))rem_password.checked = true;}rem_username.addEventListener('change',function () {if (this.checked) {localStorage.setItem('u_name', u_name.value);} else {localStorage.removeItem('u_name');}})rem_password.addEventListener('change',function () {if (this.checked) {localStorage.setItem('u_pass', u_name.value);} else {localStorage.removeItem('u_pass');}})</script>