我有一个getter从cookie中获取值。
现在我有了两个cookie，名字分别是shares=和obligation =。
我想让这个getter只从义务cookie中获取值。
我怎么做呢?因此for语句将数据拆分为单独的值，并将其放入数组中。
function getCookie1() {
// What do I have to add here to look only in the "obligations=" cookie?
// Because now it searches all the cookies.
var elements = document.cookie.split('=');
var obligations= elements[1].split('%');
for (var i = 0; i < obligations.length - 1; i++) {
var tmp = obligations[i].split('$');
addProduct1(tmp[0], tmp[1], tmp[2], tmp[3]);
}
}
只是为了给这个响应添加一个“正式”的答案，我复制/粘贴解决方案来设置和从MDN检索cookie(这里是JSfiddle
document.cookie = "test1=Hello";
document.cookie = "test2=World";
var cookieValue = document.cookie.replace(/(?:(?:^|.*;\s*)test2\s*\=\s*([^;]*).*$)|^.*$/, "$1");
function alertCookieValue() {
alert(cookieValue);
}
在您的特定情况下，您将使用以下函数
function getCookieValue() {
return document.cookie.replace(/(?:(?:^|.*;\s*)obligations\s*\=\s*([^;]*).*$)|^.*$/, "$1");
}
注意，我只是用“义务”替换了示例中的“test2”。
总是很有效:
function getCookie(cname) {
var name = cname + "=",
ca = document.cookie.split(';'),
i,
c,
ca_length = ca.length;
for (i = 0; i < ca_length; i += 1) {
c = ca[i];
while (c.charAt(0) === ' ') {
c = c.substring(1);
}
if (c.indexOf(name) !== -1) {
return c.substring(name.length, c.length);
}
}
return "";
}
function setCookie(variable, value, expires_seconds) {
var d = new Date();
d = new Date(d.getTime() + 1000 * expires_seconds);
document.cookie = variable + '=' + value + '; expires=' + d.toGMTString() + ';';
}
对jQuery或任何东西都没有要求。纯粹的老JavaScript。
在我看来，你可以把cookie键值对分成一个数组，并基于你的搜索:
var obligations = getCookieData("obligations");
运行如下:
function getCookieData( name ) {
var pairs = document.cookie.split("; "),
count = pairs.length, parts;
while ( count-- ) {
parts = pairs[count].split("=");
if ( parts[0] === name )
return parts[1];
}
return false;
}
小提琴:http://jsfiddle.net/qFmPc/
或者甚至可能是以下内容:
function getCookieData( name ) {
var patrn = new RegExp( "^" + name + "=(.*?);" ),
patr2 = new RegExp( " " + name + "=(.*?);" );
if ( match = (document.cookie.match(patrn) || document.cookie.match(patr2)) )
return match[1];
return false;
}
我写了一些可能很容易使用的东西，如果有人有什么要补充的，请随时这样做。
function getcookie(name = '') {
let cookies = document.cookie;
let cookiestore = {};
cookies = cookies.split(";");
if (cookies[0] == "" && cookies[0][0] == undefined) {
return undefined;
}
cookies.forEach(function(cookie) {
cookie = cookie.split(/=(.+)/);
if (cookie[0].substr(0, 1) == ' ') {
cookie[0] = cookie[0].substr(1);
}
cookiestore[cookie[0]] = cookie[1];
});
return (name !== '' ? cookiestore[name] : cookiestore);
}
使用
Getcookie() -返回一个包含网页上所有cookie的对象。
getcookie('myCookie') -从cookie对象返回cookie myCookie的值，否则如果cookie为空或未设置则返回undefined。
例子
// Have some cookies :-)
document.cookie = "myCookies=delicious";
document.cookie = "myComputer=good";
document.cookie = "myBrowser=RAM hungry";
// Read them
console.log( "My cookies are " + getcookie('myCookie') );
// Outputs: My cookies are delicious
console.log( "My computer is " + getcookie('myComputer') );
// Outputs: My computer is good
console.log( "My browser is " + getcookie('myBrowser') );
// Outputs: My browser is RAM hungry
console.log( getcookie() );
// Outputs: {myCookie: "delicious", myComputer: "good", myBrowser: "RAM hungry"}
// (does cookie exist?)
if (getcookie('hidden_cookie')) {
console.log('Hidden cookie was found!');
} else {
console.log('Still no cookie :-(');
}
// (do any cookies exist?)
if (getcookie()) {
console.log("You've got cookies to eat!");
} else {
console.log('No cookies for today :-(');
}
