Question

所以我写了一些cookie，但我需要将信息附加到iframe的src末尾。问题是我无法弄清楚如何选择iframe，因为它没有id。

iframe看起来像这样：

<iframe src="www.mysite.com";>

我需要它看起来像：

<iframe src="www.mysite.com&cookie";>

但是我无法使用ID来选择iframe，因为我不是创建iframe的人，如果其他页面上有iframe，则需要选择它们并以相同方式更新。所以功能需要是通用的。如果你想查看我的cookie代码，我也可以告诉你。

如果这太模糊，请告诉我，我会更新它。

这是我认为我想要做的事情。

http://jsfiddle.net/Inzblaze/2h6ke9vg/3/

Answer 1

您需要向每个iframe src附加内容吗？

var iframes = document.querySelectorAll('iframe');
for (var i = 0; i < iframes.length; i++) {
    iframes[i].src += 'something';
}

Answer 2

src属性是否始终相同？您可以通过以下方式选择它：

var frame = $("iframe[src='www.mysite.com']");

修改：

以下是获取和附加cookie的方法：

Document.cookie会将整个cookie作为字符串返回，我猜你可能只想从该cookie获得某个值。所以你可以这样做：

// This is just declaring a function that you can use to get cookie values. 
function getCookie(cookieName) {
    // If you open up your console and type in document.cookie, you will see
    // that all cookie values are inside of this same string. So this
    // function will allow you to extract the value you are looking for

    // We start by creating a new Regular Expression object, that will
    // be used to match a certain pattern of text.
    var re = new RegExp('[; ]'+cookieName+'=([^\\s;]*)');
    // This line actually uses our pattern, and returns the match from 
    // the cookie. 
    var sMatch = (' '+document.cookie).match(re);

    // if we have a cookie name, and our regular expression found a match
    // in the cookie, then return the value that was found from the match
    if (cookieName && sMatch) {
        return unescape(sMatch[1]);
    }

    // if we dont find a matching value, just return an empty string
    return '';
}

允许您执行以下操作：

// Now we are actually CALLING our function, and pass in whatever we named
// our cookie value. The variable cookieValue will then hold this value. 
var cookieValue = getCookie("cookieName"); 

// Here we are using jQuery to find the iframe element we want to manipulate
// and save reference to it in a variable called 'frame'
var frame = $("iframe[src='www.mysite.com']"); 

// From this element, we grab it's current src value
var currentSrc = frame.attr("src"); 
// here, we SET the frames src value, by setting it back to it's current src
// and tack on the cookie value
frame.attr("src", currentSrc + "&" + cookieValue);

我如何在一个iFrame中添加一个cookie到一个src的末尾？

2 个答案: