Hohohoho, follow up from the previous article using localStorage to complete the function of remembering passwords

One: Analyze the problem

Here you need to use document.cookie to realize the function

Two: Solve the problem

It is also the html code structure of my last article
js to achieve specific functions
To define a method to get a cookie, a method to set a cookie and a method to delete a cookie. The function of refreshing and remembering the password is realized by calling the method.

Three: code implementation

html：

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>记住密码</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        .body {
            height: 100%;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .center-input {
            width: 300px;
            height: 400px;
            border: 1px solid;
            border-radius: 5px;
            box-shadow: 2px 1px 1px black;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .check-input {
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .checkbox-input {
            margin: 5px;
        }
    </style>
    <script src="./rempwd.js"></script>
</head>

<body>
    <div class="body">
        <div class="center-input">
            <div class="input-content">
                <div class="username-input">
                    请输入用户名：<input class="username" type="text">
                </div>
                <div class="password-input">
                    请再输入密码：<input class="password" type="password">
                </div>
                <div class="check-input">
                    是否记住用户名密码:<input class="checkbox" type="checkbox">
                </div>
            </div> 
        </div>
    </div>
</body>

</html>

js：

window.onload = function(){
    var username = document.querySelector('.username');
    var password = document.querySelector('.password');
    var checkbox = document.querySelector('.checkbox');
    checkbox.addEventListener('change',function(){
        if(this.checked){
            setCookie('username',username.value,5)
            setCookie('password',password.value,5)
        }else{
            delCookie('username')
			delCookie('password')
        }
    })
    if(getCookie('username')&& getCookie('password')){
        username.value = getCookie('username')
        password.value = getCookie('username')
        checkbox.checked = true
    }
    //设置cookie
	function setCookie(name,value,day){
		var date = new Date();
		date.setDate(date.getDate() + day);
		document.cookie = name + '=' + value + ';expires='+ date;
	 };
	
    //获取cookie
	function getCookie(name){
		var reg = RegExp(name+'=([^;]+)');
		var arr = document.cookie.match(reg);
        // console.log(arr)
		if(arr){
		  return arr[1];
		}else{
		  return '';
		}
	 };
	
    //删除cookie
	function delCookie(name){
		setCookie(name,null,-1);
	 }
}

Use cookies to complete a function of remembering passwords

One: Analyze the problem

Two: Solve the problem

Three: code implementation

Four: Effect display

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