iframe没有src但仍然有内容？ [英] Iframe without src but still has content?

问题描述

在调试jQuery代码的网站上（通过chrome开发者工具栏）

我注意到他们的例子在 Iframe ：

（第54行及以下）

或者只是尝试：

 < iframe>< / iframe> 
 
 document.querySelector（'iframe'）[0] 
 .contentDocument.write（< h1>从父框架注入< / h1>）
  

While debugging jquery code on their site ( via chrome developer toolbar)

I noticed that their examples are given under Iframe :

Here - for example there is a sample which is under an Iframe but after investigating , I see that the Iframe doesn't have SRC

The picture shows it all

Question :

Is it possible to set content to an Iframe without setting its SRC ?

p.s. this menu also shows me an empty content

解决方案

Yes, it is possible to load an empty <iframe> (with no src specified) and later apply content to it using script.

See: http://api.jquery.com/jquery-wp-content/themes/jquery/js/main.js (line 54 and below).

Or simply try:

<iframe></iframe>

document.querySelector('iframe')[0]
        .contentDocument.write("<h1>Injected from parent frame</h1>")

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