blocks|key|3566747|text|为什么不将监听器添加到<body>|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3566748|$('body').click(function(e)+{
++++console.log("clicked")
})|code-block|syntax|javascript|3566749|entityMap^0|B|6|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

<p>Why not add the listener to <code>&lt;body&gt;</code>?</p>

<pre><code>$('body').click(function(e) {
    console.log("clicked")
})
</code></pre>


blocks|key|3707529|text|试试这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3707530|$('body').on('click','iframe',function(e)+{
+++++++console.log("clicked");
});|code-block|syntax|javascript|3707531|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>Try this:</p>

<pre><code>$('body').on('click','iframe',function(e) {
       console.log("clicked");
});
</code></pre>


blocks|key|3707562|text|我建议递归地检查帧并附加侦听器。这真的不应该这样做，但这是唯一的方法。请注意，由于对代码段的沙箱限制，此代码段不能在SO上工作。我已经测试过了，它可以在本地服务器上工作。我也找不到(在有限的时间内)绕过我目前正在使用的setTimeout的方法。感觉它是在页面加载之前应用的，但我看不到这些load事件的任何影响，所以为了演示它是如何工作的，请检查以下内容：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3707563|​|3707564|function+nestedIFrameEventAttacher(+iframe,+event,+handler+){

++const+content+=+iframe.contentDocument+%7C%7C+(iframe.contentWindow+?+iframe.contentWindow+.document+:+iframe);
++const+body+=+content.querySelector(+'body'+);
++++
++body.addEventListener(+event,+handler+);
++
++//+I+have+tried+attaching+`load`+and+`DOMContentLoaded`+events
++//+to+the+`iframe`+and+the+`body`+but+none+of+them+seemed+to+trigger.+
++//+This+is+therefor+not+guaranteed+to+work,+but+you+can+start+from+this.
++setTimeout(function(){
++
++++Array.from(+body.querySelectorAll(+'iframe'+)+).forEach(iframe+=>+{

++++++nestedIFrameEventAttacher(+iframe,+event,+handler+);

++++});
++
++},+100);

}

const+output+=+document.getElementById(+'output'+)

nestedIFrameEventAttacher(+document,+'click',+function(+event+){
++++
++++output.textContent+=+this.querySelector(+'h1'+).textContent;

});|code-block|syntax|javascript|3707565|#output{+color:+red;+}|3707566|<div+id="output">Stealie+the+Dog</div>
<h1>Root</h1>
<iframe+srcdoc="<html><head></head><body><h1>Second</h1><iframe+srcdoc='<html><head></head><body><h1>Deeper</h2></body></html>'></iframe></body></html>"+width="100%25"+height="500px"></iframe>|3707567|3707568|entityMap^0|31|A|41|4|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@$9|U|A|V|B|C]|$9|W|A|X|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Y|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|Z|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|J|7|10|8|@]|D|@]|E|$K|L]]|$1|O|3|P|5|J|7|11|8|@]|D|@]|E|$K|L]]|$1|Q|3|G|5|6|7|12|8|@]|D|@]|E|$]]|$1|R|3|-4|5|6|7|13|8|@]|D|@]|E|$]]]|S|$]]

<p>I would suggest recursively checking for frames and attaching listeners. This really shouldn't be done, but it's the only way. Be aware this snippet does not work on SO due to sandboxing restrictions on snippets. I have tested it and it works locally an a server. I am also not able to find (in the limited time I have) a way around the <code>setTimeout</code> I am currently using. It feels like it gets applied before the page is loaded, but I can't see any effect from these <code>load</code> events, so for the sake of just showing how it could work, please check this:</p>

<p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>function nestedIFrameEventAttacher( iframe, event, handler ){

  const content = iframe.contentDocument || (iframe.contentWindow ? iframe.contentWindow .document : iframe);
  const body = content.querySelector( 'body' );
    
  body.addEventListener( event, handler );
  
  // I have tried attaching `load` and `DOMContentLoaded` events
  // to the `iframe` and the `body` but none of them seemed to trigger. 
  // This is therefor not guaranteed to work, but you can start from this.
  setTimeout(function(){
  
    Array.from( body.querySelectorAll( 'iframe' ) ).forEach(iframe =&gt; {

      nestedIFrameEventAttacher( iframe, event, handler );

    });
  
  }, 100);

}

const output = document.getElementById( 'output' )

nestedIFrameEventAttacher( document, 'click', function( event ){
    
    output.textContent = this.querySelector( 'h1' ).textContent;

});</code></pre>
<pre class="snippet-code-css lang-css prettyprint-override"><code>#output{ color: red; }</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div id="output"&gt;Stealie the Dog&lt;/div&gt;
&lt;h1&gt;Root&lt;/h1&gt;
&lt;iframe srcdoc="&lt;html&gt;&lt;head&gt;&lt;/head&gt;&lt;body&gt;&lt;h1&gt;Second&lt;/h1&gt;&lt;iframe srcdoc='&lt;html&gt;&lt;head&gt;&lt;/head&gt;&lt;body&gt;&lt;h1&gt;Deeper&lt;/h2&gt;&lt;/body&gt;&lt;/html&gt;'&gt;&lt;/iframe&gt;&lt;/body&gt;&lt;/html&gt;" width="100%" height="500px"&gt;&lt;/iframe&gt;</code></pre>
</div>
</div>
</p>


<p>I am working on something which requires me to add mouse/keyboard event listeners to the document on document load.</p>

<p><code>document/window.addEventListener()</code> worked well until I came across Frameset/frames/iframes.</p>

<p>I did some workaround, like iterating through all the frames of frameset and added event-listeners to them.</p>

<p>Then I realized frames are loaded dynamically, after DOM.
So I've done something like this: </p>

<pre><code>    bindListenersToFrame: function(element){
        var $ = domUtils.jQuery;
        $(element).ready(function(){
            if(element.tagName == "FRAMESET" || element.tagName == "BODY"){
                    for(var i=0; i &lt; element.children.length; i++){
                            domUtils.bindListenersToFrame(element.children[i]);
                    }
            }
            if(element.tagName == "FRAME" || element.tagName == "IFRAME"){
                $('iframe').load(function(){
                    domUtils.addListener(element);
                    if(element.contentDocument.documentElement){
                            for(var i=0; i &lt; element.contentDocument.documentElement.children.length; i++){
                                    domUtils.bindListenersToFrame(element.contentDocument.documentElement.children[i]);
                            }
                    }
                });
            }
        });
}
</code></pre>

<p>Above method is recursive in nature and domUtils is just a object with methods like "addListener".</p>

<p>Any help would be greatly appreciated.
Thank you.</p>


To add event listeners to all the frames in a document

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在做一些事情，需要我在文档加载时向文档添加鼠标/键盘事件侦听器。document/window.addEventListener()运行良好，直到我遇到了框架集/框架/iframes。我做了一些变通方法，比如遍历框架集的所有框架，并向它们添加事件侦听器。然后我意识到帧是在DOM之后动态加载的。所以我做了这样的事情：...

问将事件侦听器添加到文档中的所有框架
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