如何在javascript中获取动态创建的标签元素的id

Question

I want to get the text of a dynamically created label in javascript, which is created in jade. Here's the jade:

- for( var i = 0; i < groupsName.length; i++ ) {
  li
    a(href='JavaScript:validation(this)')
        img(src='/images/edit.png', width='60', height='60', style='margin:8px 10px 10px 20px;')  
         h3 #{groupsName[0]}
          label(for='groupsId' , id='labelid'+i ) #{groupsId[i]}
      a(href='/groupdetails') Edit  
  - }

And this is my javascript code:

 function validation(val){
   var valid=val.id;
   alert(document.getElementById(valid).innerHTML);
 }

Answer 1

Not sure if I'm interpreting your template correctly, but as long as the dynamic label is descendant of the anchor tag which triggers the validation this should work:

First replace the href by an onclick otherwise the this being passed will reference the window . The generated anchor tag should look like this:

<a href="javascript:void(0);" onclick="validation(this);">

Then just adapt your function slightly:

function validation(anchor) {
    var lbl = anchor.getElementsByTagName('label')[0];
    alert(lbl.innerHTML);
    alert(lbl.id);
}​

Fiddle