javascript - Why no return object when I add a tag dynamically? -


the selected "tr" tag added dynamically click event, cannot return click event. original static "tr" tags above dynamically added "tr" can return same click event.

i cannot figure out, seek here.

thanks

//eventhandler current this<tr> object $('tr').click(function () {                     console.log(this) } //original static <tr>, works fine <tr>                     <td>meet friends dinner</td>                     <td><time datetime="2013-10-14">2013-10-14</time></td>                     <td>personal</td>                     <td>                         <nav>                             <a href="#">edit</a>                             <a href="#">complete</a>                             <a href="#">delete</a>                         </nav>                     </td> </tr> //how add <tr> dynamically <script id="taskrow" type="text/x-jquery-tmpl"> <tr>     <td>${task}</td>     <td><time datetime="${requiredby}">${requiredby}</time></td>     <td>${category}</td>     <td>         <nav>             <a href='#'>edit</a>             <a href='#'>complete</a>             <a href='#' class='deleterow'>delete</a>          </nav>      </td> </tr> </script>

event handlers bound selected elements; must exist on page @ time code makes call .click()

thus in following code tr must exist before code generated.

$('tr').click(function () {   console.log(this); }

if new html being injected page, preferable use delegated events attach event handler, described next.

delegated events have advantage can process events descendant elements added document @ later time.

$("table").on("click", "tr", function(event){     console.log(this); });

see fiddle more information.

note: delegated-events approach (the second code example) attaches event handler 1 element, table, , event needs bubble 1 level (from clicked tr table).


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