从iFrame中获取元素 [英] Get element from within an iFrame

问题描述

如何从< iframe> ？

推荐答案

var iframe = document.getElementById('iframeId');
var innerDoc = (iframe.contentDocument) ? iframe.contentDocument : iframe.contentWindow.document;

您可以更简单地写出：

You could more simply write:

var iframe = document.getElementById('iframeId');
var innerDoc = iframe.contentDocument || iframe.contentWindow.document;

并返回第一个有效的内部文档。

and the first valid inner doc will be returned.

一旦获得了内部文档，就可以像访问当前页面上的任何元素一样访问其内部。 （ innerDoc.getElementById ...等）

Once you get the inner doc, you can just access its internals the same way as you would access any element on your current page. (innerDoc.getElementById...etc.)

重要提示：该iframe在同一个域中，否则您无法访问其内部。这将是跨站点脚本。

IMPORTANT: Make sure that the iframe is on the same domain, otherwise you can't get access to its internals. That would be cross-site scripting.

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