Frameworks used: JavaScript, AJAX, HTML. Cannot use JQuery Have to display SQL table on page Last column of the table should contain an image which acts like a delete button On clicking that delete image, the row should be deleted from HTML table and SQL table In my code the onClick is not working HTML code table rows displayed by

Delete a HTMLtable row using AJAX

Frameworks used: JavaScript, AJAX, HTML. Cannot use JQuery
Have to display SQL table on page
Last column of the table should contain an image which acts like a delete button
On clicking that delete image, the row should be deleted from HTML table and SQL table
In my code the onClick is not working

HTML code

table rows displayed by looping through rows of sql query result.

<td>
  <span class="delete" onClick="divFunction()" data-id="<?= $id; ?>"
    ><img src="delete.png"
  /></span>
</td>

JavaScript
​x
 
<td>  <span class="delete" onClick="divFunction()" data-id="<?= $id; ?>"    ><img src="delete.png"  /></span></td>​

JavaScript code

document.addEventListener("DOMContentLoaded", function () {
  function divFunction() {
    // Storing element that will be deleted
    var el = document.getElementById("delete");
    var deleteid = el.getAttribute("data-id");

    // Creating AJAX request
    var params = "id=" + deleteid;
    var request = new XMLHttpRequest();
    request.open("POST", "remove.php", true);
    request.setRequestHeader(
      "Content-type",
      "application/x-www-form-urlencoded"
    );
    request.send(params);
    el.remove();
  }
});

JavaScript
 
document.addEventListener("DOMContentLoaded", function () {  function divFunction() {    // Storing element that will be deleted    var el = document.getElementById("delete");    var deleteid = el.getAttribute("data-id");​    // Creating AJAX request    var params = "id=" + deleteid;    var request = new XMLHttpRequest();    request.open("POST", "remove.php", true);    request.setRequestHeader(      "Content-type",      "application/x-www-form-urlencoded"    );    request.send(params);    el.remove();  }});​

PHP Code

file name: remove.php

if (($con = mysqli_connect("localhost", "user", "password", "database", "port"))==false) {
  die(mysqli_connect_error());
}

$id = 0;
if (isset($_POST['id'])) {
   $id = mysqli_real_escape_string($con,$_POST['id']);
}

// Delete the row
$query = "DELETE FROM Coorporations WHERE id='".$id."'";
mysqli_query($con,$query);
mysqli_free_result($result);
mysqli_close($conn);
exit;

JavaScript
 
if (($con = mysqli_connect("localhost", "user", "password", "database", "port"))==false) {  die(mysqli_connect_error());}​$id = 0;if (isset($_POST['id'])) {   $id = mysqli_real_escape_string($con,$_POST['id']);}​// Delete the row$query = "DELETE FROM Coorporations WHERE id='".$id."'";mysqli_query($con,$query);mysqli_free_result($result);mysqli_close($conn);exit;​

Answer

Seems like you might have made things a bit too complicated. Let’s assume you’ve the following table:

<table>
    <tr>
        <td>
            <!-- 
               Let's not define any onclick handlers here, 
               we'll do that in an instant. 

               For demonstration purposes, let's give all elements 
               a hardcoded id.
            -->
            <span class='delete' data-id='1'>Delete entry</span>
        </td>
    </tr>
    <tr>
        <td>
            <span class='delete' data-id='2'>Delete entry</span>
        </td>
    </tr>
</table>

JavaScript
 
<table>    <tr>        <td>            <!--                Let's not define any onclick handlers here,                we'll do that in an instant. ​               For demonstration purposes, let's give all elements                a hardcoded id.            -->            <span class='delete' data-id='1'>Delete entry</span>        </td>    </tr>    <tr>        <td>            <span class='delete' data-id='2'>Delete entry</span>        </td>    </tr></table>​

Inside a <script> tag at the bottom of your HTML document, or in a separate file, you might want to try:

// Grab all elements taht should fire an event when clicked  
let elements = document.querySelectorAll('span.delete');

for (let i = 0; i < elements.length; i++) {

    // Attach an event listener to them    
    elements[i].addEventListener('click', function(e) {

        // 'e' is the event object itself, 'target' the one
        // that triggered the event in the first place, i.e.
        // one of those <span> elements.
        let element = e.target
        let id      = e.target.dataset.id;

        console.log(id);

        // AJAX stuff
        // ...
    });

}

JavaScript
 
// Grab all elements taht should fire an event when clicked  let elements = document.querySelectorAll('span.delete');​for (let i = 0; i < elements.length; i++) {​    // Attach an event listener to them        elements[i].addEventListener('click', function(e) {​        // 'e' is the event object itself, 'target' the one        // that triggered the event in the first place, i.e.        // one of those <span> elements.        let element = e.target        let id      = e.target.dataset.id;​        console.log(id);​        // AJAX stuff        // ...    });​}​

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Answer