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Simple code sharing for JavaScript login and password remembering operation

黄舟Original: 2017-03-23 14:32:541586browse

This article will share with you a simple jscode implementationUser login Remember the password operation, the code is simple and easy to understand, very good, and has reference value. Friends who need it can refer to it

No more nonsense, I will post the code directly for everyone. The specific code is as follows :

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title>记住密码</title>
</head>
<body>
<form id="loginForm">
  <input id="user" type="text" placeholder="用户名"><br>
  <input id="pswd" type="password" placeholder="密码"><br>
  <label><input id="remember" type="checkbox">记住密码</label><br>
  <input type=&#39;submit&#39; value="登录">
</form>
<script>
  window.onload = function(){
    var oForm = document.getElementById(&#39;loginForm&#39;);
    var oUser = document.getElementById(&#39;user&#39;);
    var oPswd = document.getElementById(&#39;pswd&#39;);
    var oRemember = document.getElementById(&#39;remember&#39;);
    //页面初始化时，如果帐号密码cookie存在则填充
    if(getCookie(&#39;user&#39;) && getCookie(&#39;pswd&#39;)){
      oUser.value = getCookie(&#39;user&#39;);
      oPswd.value = getCookie(&#39;pswd&#39;);
      oRemember.checked = true;
    }
    //复选框勾选状态发生改变时，如果未勾选则清除cookie
    oRemember.onchange = function(){
      if(!this.checked){
        delCookie(&#39;user&#39;);
        delCookie(&#39;pswd&#39;);
      }
    };
    //表单提交事件触发时，如果复选框是勾选状态则保存cookie
    oForm.onsubmit = function(){
      if(remember.checked){ 
        setCookie(&#39;user&#39;,oUser.value,7); //保存帐号到cookie，有效期7天
        setCookie(&#39;pswd&#39;,oPswd.value,7); //保存密码到cookie，有效期7天
      }
    };
  };
  //设置cookie
  function setCookie(name,value,day){
    var date = new Date();
    date.setDate(date.getDate() + day);
    document.cookie = name + &#39;=&#39; + value + &#39;;expires=&#39;+ date;
  };
  //获取cookie
  function getCookie(name){
    var reg = RegExp(name+&#39;=([^;]+)&#39;);
    var arr = document.cookie.match(reg);
    if(arr){
      return arr[1];
    }else{
      return &#39;&#39;;
    }
  };
  //删除cookie
  function delCookie(name){
    setCookie(name,null,-1);
  };
</script>
</body>
</html>

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