从html获取节点/子节点

Question

The first thing I do is I echo some html code:

echo "<div>
        <file>somefile</file>
        <file>another file</file>
      </div>";

Then I through JavaScript find all instances of file:

var file = document.getElementsByTagName("file");

Then I am able to get values from each file by:

file[index].childNodes[0].nodeValue

Now I want to add another level to the <file> like this:

echo "<div>
        <file>
          <em1>element1</em1>
          <em2>element2</em2>
        </file>
      </div>";

How can I get those em values? I want to do something like:

file[index].getValueFromEm1...

Answer 1

Try

file[index].childNodes[0].nodeValue
file[index].childNodes[1].nodeValue

etc...

Answer 2

try this

PHP

<?php
echo "<div>
        <file>
          <em1>element1</em1>
          <em2>element2</em2>
        </file>

       <file>
        <em1>element3</em1>
        <em2>element4</em2>
      </file>
      </div>";
?>

JS

<script>
var file = document.getElementsByTagName("file");
for(var i=0; i<file.length; i++)
{
    var filenodes = file[i].childNodes;
    for(var j=0; j<filenodes.length; j++)
    {
        var element_text = filenodes[j].innerHTML;
        if(typeof element_text!= 'undefined')
        {
            alert(element_text);
        }   
    }
}
</script>

Answer 3

you can still access the content of the ems like you did with the original content.

var files= document.getElementsByTagName("file");
files[0].childNodes[0].textContent
files[0].childNodes[1].textContent