javascript 从变量设置 cookie 值
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Set cookie value from variable
提问by Blob
I have been recently trying to set a cookie holding the user's name, it opens a prompt pop-up box asking for a new user name. When the user inserts the user name and clicks "ok" it doesn't treat the variable (sconName) as a variable and just puts "sconName".
我最近一直在尝试设置一个包含用户名的 cookie，它会打开一个提示弹出框，要求输入新的用户名。当用户插入用户名并单击“确定”时，它不会将变量 (sconName) 视为变量，而只是输入“sconName”。
Note: Scon is the name of the website.
注意：Scon 是网站的名称。
Heres the only script I am using:
这是我使用的唯一脚本：
<html>
<body>
<script>
function readCookie(name) {
var nameEQ = name + "=";
var ca = document.cookie.split(';');
for(var i=0;i < ca.length;i++) {
var c = ca[i];
while (c.charAt(0)==' ') c = c.substring(1,c.length);
if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
}
return null; }
</script>
<script>
var username = readCookie('sconName');
if (username) {
document.write("Your current username is: " + username);
}
else {
document.write("You have no user name");
}
function changeUsername() {
var changedName=prompt("Enter user name.");
if (changedName) {
document.cookie = 'sconName=changedName; expires=Wed, 1 Jan 2070 13:47:11 UTC; path=/'}}
</script>
<button onclick="changeUsername()">Change</button>
</body>
</html>
Please can you explain how to tell the system that its a variable not just text. Thanks.
请您解释一下如何告诉系统它是一个变量而不仅仅是文本。谢谢。
回答by Crayon Violent
javascript does not parse variables inside quotes. You need to break out of the quotes to use the variable:
javascript 不解析引号内的变量。您需要打破引号以使用变量：
document.cookie = 'sconName='+changedName+'; expires=Wed, 1 Jan 2070 13:47:11 UTC; path=/'
