Javascript 获取iframe onload元素

我有

如何进入“测试”功能的iFramesrc

功能测试（）{
//获取iframe src
var代码=假；
if（代码）
警报（“代码：”+代码）；
}

这是视频

参考资料是您的选择吗

<h2>this is the video</h2>
<div style="width:150px">
  <div class="video-container">
    <iframe id="test456" src="https://www.youtube.com/embed/amDMGIyyrlw" onload="test(this)"></iframe>
  </div>
</div>

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因为问题中有一个jQuery标记，下面是jQuery的答案。当然，您需要在页面中引用jQuery库，才能使其正常工作

HTML:

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用于从DOM标记中删除js函数调用的+1。那更好。假设我有100个视频的动态负载。其中50人应该通过测试，另外50人不应该。。。因此，我需要对每个视频单独说明它是

test（）

还是不…更新了代码示例，以显示如何将目标对象（表示iframe）传递给您希望执行其他逻辑的任何函数。

function test(caller){
  // obtain the iframe src 
  // then youtube embed code
    alert(caller.id);
  var code = false;
  if (code)
    alert('code: ' + code);
}

<h2>this is the video</h2>
<div style="width:150px">
    <div class="video-container">
        <!-- note: removed the onload definition from the iframe element -->
        <iframe id="test456" src="https://www.youtube.com/embed/amDMGIyyrlw"></iframe>
    </div>
</div>

//jquery document ready event -- fires when document is first loaded
$('document').ready(function(){

    //attach an onload event handler to each iframe     
    //(can change the selector to select specific iframes)
    $('iframe').load(function(e){

        //the jquery event will automatically have a target 
        //property that is set to the element that fired the event
        //you can pull the src property from that
        alert(e.target.src);

        //pass the target element to a test function
        test(e.target);
    });
});

function test(iframe){
    //check src or other properties to see if the element passes or fails the test
    //example: testing that the value is not the empty string
    //but any check can be done here depending on requirements
    if(iframe.src != ""){

        //check any properties of the iframe

        //pass or fail

        //perform other actions as needed
    }
}