仅当td在特定的html标签之后不包含任何内容时才隐藏tr

Question

Is it possible to examine the content within a tr, AFTER an html element (br) to see if any exists? If there is no content after the br element, I'd like to hide the parent td. Please note that the html code is system generated and I cannot edit it.

I'm just not sure where to begin with this. Any help is greatly appreciated.

  <table class="tabledefault"> <tbody> <tr> <td id="customfields"> <table class="tabledefault"> <tbody> <tr><!-- this TR should be hidden --> <td id="CAT_Custom_451068"><strong>Laser Tag</strong> <br> </td> </tr> <tr> <td id="CAT_Custom_451069"><strong>Arcade</strong> <br>Selected </td> </tr> <tr> <td id="CAT_Custom_450908"><strong>Bounce House (45 minutes) $100</strong> <br>False </td> </tr> <tr> <td id="CAT_Custom_451307"><strong>Party Room Rental (per hour) $75</strong> <br>True</td> </tr> </tbody> </table> </td> </tr> </tbody> </table> 

Answer 1

Yes, you just get the tr s, then find out if the first <br> element inside the first <td> has any following element siblings (I'm making an assumption there, that you don't want those hidden), or any following text node siblings that aren't blank. jQuery's contents is handy for that, as it includes text nodes. I'd probably loop through them backward:

$("#customfields .tabledefault tr").each(function(index) {
  var $tr = $(this);
  $tr.find("td:first").contents().get().reverse().some(function(node) {
    if (node.nodeName.toUpperCase() === "BR") {
      // Hide it, and we're done looping
      $tr.hide();
      return true;
    }
    if (node.nodeType != 3 || $.trim(node.nodeValue)) {
      // Don't hide it, and we're done looping
      return true;
    }
  });
});

I expect that can be optimized, but you get the idea.

Live Example:

 var counter = 3; tick(); function tick() { $("#countdown").text(counter--); if (counter < 0) { hideIt(); } else { setTimeout(tick, 500); } } function hideIt() { $("#customfields .tabledefault tr").each(function(index) { var $tr = $(this); $tr.find("td:first").contents().get().reverse().some(function(node) { if (node.nodeName.toUpperCase() === "BR") { // Hide it, and we're done looping $tr.hide(); return true; } if (node.nodeType != 3 || $.trim(node.nodeValue)) { // Don't hide it, and we're done looping return true; } }); }); } 

 <table class="tabledefault"> <tbody> <tr> <td id="customfields"> <table class="tabledefault"> <tbody> <tr> <!-- this TR should be hidden --> <td id="CAT_Custom_451068"><strong>Laser Tag</strong> <br> </td> </tr> <tr> <td id="CAT_Custom_451069"><strong>Arcade</strong> <br>Selected </td> </tr> <tr> <td id="CAT_Custom_450908"><strong>Bounce House (45 minutes) $100</strong> <br>False </td> </tr> <tr> <td id="CAT_Custom_451307"><strong>Party Room Rental (per hour) $75</strong> <br>True</td> </tr> </tbody> </table> </td> </tr> </tbody> </table> <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script> <div id="countdown">&nbsp;</div> 

Answer 2

Try using .each() , nextSibling , nodeValue , String.prototype.match() , .closest()

 $("table tr td br").each(function(i, el) { // if `br` next sibling does not contain alphanumeric characters, // hide parent `tr` element if (el.nextSibling.nodeType === 3 && el.nextSibling.nodeValue.match(/\\w+/) === null || $(el).next(":empty").length) { $(this).closest("tr").hide() } }) 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"> </script> <table class="tabledefault"> <tbody> <tr> <td id="customfields"> <table class="tabledefault"> <tbody> <tr><!-- this TR should be hidden --> <td id="CAT_Custom_451068"><strong>Laser Tag</strong> <br><span></span> </td> </tr> <tr> <td id="CAT_Custom_451069"><strong>Arcade</strong> <br>Selected </td> </tr> <tr> <td id="CAT_Custom_450908"><strong>Bounce House (45 minutes) $100</strong> <br>False </td> </tr> <tr> <td id="CAT_Custom_451307"><strong>Party Room Rental (per hour) $75</strong> <br>True</td> </tr> </tbody> </table> </td> </tr> </tbody> </table>