Contoh dalam artikel ini menerangkan cara untuk menetapkan dan mendapatkan kuki dalam javascript. Kongsikan dengan semua orang untuk rujukan anda, butirannya adalah seperti berikut:
1. Tetapkan kuki
function setCookie(cookieName,cookieValue,cookieExpires,cookiePath) { cookieValue = escape(cookieValue);//编码latin-1 if(cookieExpires=="") { var nowDate = new Date(); nowDate.setMonth(nowDate.getMonth()+6); cookieExpires = nowDate.toGMTString(); } if(cookiePath!="") { cookiePath = ";Path="+cookiePath; } document.cookie= cookieName+"="+cookieValue+";expires="+cookieExpires+cookiePath; }
2. Dapatkan kuki
function getCookieValue(cookieName) { var cookieValue = document.cookie; var cookieStartAt = cookieValue.indexOf(""+cookieName+"="); if(cookieStartAt==-1) { cookieStartAt = cookieValue.indexOf(cookieName+"="); } if(cookieStartAt==-1) { cookieValue = null; } else { cookieStartAt = cookieValue.indexOf("=",cookieStartAt)+1; cookieEndAt = cookieValue.indexOf(";",cookieStartAt); if(cookieEndAt==-1) { cookieEndAt = cookieValue.length; } cookieValue = unescape(cookieValue.substring(cookieStartAt,cookieEndAt));//解码latin-1 } return cookieValue; }
Contoh:
<!doctype html> <html> <head> <title>cookie</title> <meta charset="utf-8"> <script language="javascript" type="text/javascript"> //获取cookie function getCookieValue(cookieName) { var cookieValue = document.cookie; var cookieStartAt = cookieValue.indexOf(""+cookieName+"="); if(cookieStartAt==-1) { cookieStartAt = cookieValue.indexOf(cookieName+"="); } if(cookieStartAt==-1) { cookieValue = null; } else { cookieStartAt = cookieValue.indexOf("=",cookieStartAt)+1; cookieEndAt = cookieValue.indexOf(";",cookieStartAt); if(cookieEndAt==-1) { cookieEndAt = cookieValue.length; } cookieValue = unescape(cookieValue.substring(cookieStartAt,cookieEndAt));//解码latin-1 } return cookieValue; } //设置cookie function setCookie(cookieName,cookieValue,cookieExpires,cookiePath) { cookieValue = escape(cookieValue);//编码latin-1 if(cookieExpires=="") { var nowDate = new Date(); nowDate.setMonth(nowDate.getMonth()+6); cookieExpires = nowDate.toGMTString(); } if(cookiePath!="") { cookiePath = ";Path="+cookiePath; } document.cookie= cookieName+"="+cookieValue+";expires="+cookieExpires+cookiePath; } //页面加载时间处理函数 function window_onload() { var userNameElem = document.getElementById("userName");//用户名输入框对象 var passwordElem = document.getElementById("password");//密码输入框对象 var currUserElem = document.getElementById("currUser");//复选框对象 var currUser = getCookieValue("currUser"); if(currUser!=null) { userNameElem.value=currUser; currUserElem.checked = true; } if(userNameElem.value!="") { passwordElem.focus();//密码输入框获得焦点 } else { currUserElem.focus();//用户名输入框获得焦点 } } //表单提交处理 function login() { var userNameElem = document.getElementById("userName"); var passwordElem = document.getElementById("password"); var currUserElem = document.getElementById("currUser"); if(userNameElem.value=="" || passwordElem.value=="") { alert("用户名或密码不能为空!"); if(userNameElem.value=="") { userNameElem.focus();//用户名输入框获得焦点 } else { passwordElem.focus();//密码输入框获得焦点 } return false; } if(currUserElem.checked) { setCookie("currUser",userNameElem.value,"","");//设置cookie } else { var nowDate = new Date();//当前日期 nowDate.setMonth(nowDate.getMonth()-2);//将cookie的过期时间设置为之前的某个日期 cookieExpires = nowDate.toGMTString();//过期时间的格式必须是GMT日期的格式 setCookie("userName","",cookieExpires,"");//删除一个cookie只要将过期时间设置为过去的一个时间即可 } return true; } </script> <style type="text/css"> div{ font-size:12px; } </style> </head> <body onload="window_onload()"> <div> <form id="loginForm" onsubmit="return login()"> 用户名:<input type="text" id="userName"><br> 密 码:<input type="password" id="password"> <input type="checkbox" id="currUser">记住用户名<br> <input type="submit" value="登录"> </form> </div> </body> </html>
Nota:
Memandangkan Google Chrome hanya menyokong kuki dalam talian atas sebab keselamatan, ia tidak mempunyai kesan apabila diuji secara setempat Anda perlu memuat naiknya ke pelayan untuk mencuba.
Untuk mendapatkan maklumat lanjut tentang kuki pengendalian JavaScript, sila lihat topik khas di tapak ini: " Ringkasan pengetahuan berkaitan kuki pengendalian JavaScript " dan " Ringkasan kemahiran pengendalian kuki jQuery "
Saya harap artikel ini akan membantu semua orang dalam pengaturcaraan JavaScript.