如何在 JavaScript 中获取和设置 cookie
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How to get and set cookies in JavaScript
提问by Pilan
Getting and setting Cookies via JavaScript feels a little odd like this:
通过 JavaScript 获取和设置 Cookie 感觉有点奇怪，如下所示：
Set: document.cookie = "<key>=<value>[;expires=<utc_expires>[;path=<path>]]";
放： document.cookie = "<key>=<value>[;expires=<utc_expires>[;path=<path>]]";
Get: parse document.cookie
获取：解析document.cookie
I found this get and set function on W3C.org Cookies
我在W3C.org Cookies上发现了这个 get 和 set 函数
Is there a more elegant/easy way to do this?
有没有更优雅/简单的方法来做到这一点？
回答by
You can use some simple functions like setCookie()and getCookie().
您可以使用一些简单的函数，例如setCookie()和getCookie()。
You can set a cookie using the call:
您可以使用以下调用设置 cookie：
setCookie('myName','value', 3);
function setCookie(name, value, days) {
var expires = "";
if (days) {
var date = new Date();
date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
expires = "; expires=" + date.toUTCString();
}
document.cookie = name + "=" + (value || "") + expires + "; path=/";
}
function getCookie(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;
}Note: Source is from quirksmode. Please have a look at the docsif you want to know more about cookies.
注意：来源来自quirksmode。如果您想了解有关 cookie 的更多信息，请查看文档。
回答by ofcyln
ES6 approach is:
ES6的做法是：
const setCookie = (cookieKey, cookieValue, expirationDays) => {
let expiryDate = '';
if (expirationDays) {
const date = new Date();
date.setTime(`${date.getTime()}${(expirationDays || 30 * 24 * 60 * 60 * 1000)}`);
expiryDate = `; expiryDate=" ${date.toUTCString()}`;
}
document.cookie = `${cookieKey}=${cookieValue || ''}${expiryDate}; path=/`;
}
const getCookie = (cookieKey) => {
let cookieName = `${cookieKey}=`;
let cookieArray = document.cookie.split(';');
for (let cookie of cookieArray) {
while (cookie.charAt(0) == ' ') {
cookie = cookie.substring(1, cookie.length);
}
if (cookie.indexOf(cookieName) == 0) {
return cookie.substring(cookieName.length, cookie.length);
}
}
}
