将属性值的一部分克隆到另一个元素中的另一个属性 - js

Question

我要[标题] 这是我的肆意代码：

<script>
$(document).ready(function(){
    var thmbElt = document.getElementsByClassName("imgbox")[0]{var vl1 = $(this).attr("src");};
    $(.h_iframe-aparat_embed_frame).attr("src",function{
        return "https://www.example.com/video/video/embed/videohash/"+vl1.substr(51, 56)+"/vt/frame"; 
});
</script>

结果是：无

Answer 1

如果我没理解错的话，你想获取一个元素的src，然后在另一个元素中使用它的一部分。以下是示例：

<img src="https://images.pexels.com/photos/34950/pexels-photo.jpg?h=350&auto=compress&cs=tinysrgb" 
class="imgbox" width="80px" height="80px" />
<img src="https://images.pexels.com/photos/34950/pexels-photo.jpg?h=350&auto=compress&cs=tinysrgb" 
class="imgbox" width="80px" height="80px" />

<script>
   $(document).ready(function(){
        var thmbElt = document.getElementsByClassName("imgbox")[0];
        var thmbElt1 = document.getElementsByClassName("imgbox")[1]; //Change this line to get img src from another field

        var attr = thmbElt1.getAttribute("src"); 
        var attrSubset = "https://www.example.com/video/video/embed/videohash/" + attr.substr(8,6) + "/vt/frame";
        thmbElt.setAttribute("src", attrSubset);
    });  
</script>

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