CODEWITHSUNDEEP
javascriptjquerydom-events
Neo
Neo

Reputation: 3399

Remove events on an HTML element

I have a textarea element. Somewhere in this mess of legacy code I believe an event is registered preventing me from entering text into the textarea. I have tried the following code.

$('#clinicalNotesEditable').off("keyup keydown keypress change blur");

$('#clinicalNotesEditable').on("click", function() {
  $(this).attr('disabled', false);
  $(this).attr('readonly', false);
  console.log('Click on textarea by ID');
  // I can see the CLICK event is captured.
});


$('#clinicalNotesEditable').on("keyup keydown keypress", function() {
  console.log('Key pressed on textarea by ID');
  // I do not see this message.
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<textarea class="noteseditable" id="clinicalNotesEditable" style="width: 370px !important; vertical-align: middle; display: inline-block; -ms-overflow-y: scroll;" placeholder="click here to enter a note" rows="8"></textarea>

The only thing I can think of is that I am not properly using .off() correctly. How can I remove all the events from the clinicalNotesEditable element?

Upvotes: 1

Views: 253

Answers (3)

guest271314
guest271314

Reputation: 1

You can iterate jQuery._data(<DOM element>, 'events') and remove both delegated and non-delegated events 

$("body").on('click', '#clinicalNotesEditable', function() {
  console.log('delegated');
});

$("body").on('click', function() {
  console.log('not delegated');
});

$('#clinicalNotesEditable').on("click", function() {
  $(this).attr('disabled', false);
  $(this).attr('readonly', false);
  console.log('Click on textarea by ID');
});


$('#clinicalNotesEditable').on("keyup keydown keypress", function() {
  console.log('Key pressed on textarea by ID');
  //I see this in the CONSOLE
});

var selector = '#clinicalNotesEditable';

$.each([$(window), $(document), $("*")], function(key, value) {
  $.each(value, function(k, v) {
    var event = $._data(v, "events");
    if (event !== undefined) {
      $.each(event, function(a, b) {
        if (b[0].selector === selector) {
          $(v).off(a, '**');
        } else {
          if ('#' + v.id === selector) {
            $(selector).off(a);
          }
        }
      });    
    }
  });
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<textarea class="noteseditable" id="clinicalNotesEditable" style="width: 370px !important; vertical-align: middle; display: inline-block; -ms-overflow-y: scroll;" placeholder="click here to enter a note" rows="8"></textarea>

Upvotes: 1

Alexandr
Alexandr

Reputation: 1031

You can unbind() instead of off()

$('#clinicalNotesEditable').off("keyup keydown keypress change blur");

$('#clinicalNotesEditable').on("click", function() {
  $(this).attr('disabled', false);
  $(this).attr('readonly', false);
  console.log('Click on textarea by ID');
});


$('#clinicalNotesEditable').on("keyup keydown keypress", function() {
  console.log('Key pressed on textarea by ID');
  //I see this in the CONSOLE
});
$('#clinicalNotesEditable').unbind()
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<textarea class="noteseditable" id="clinicalNotesEditable" style="width: 370px !important; vertical-align: middle; display: inline-block; -ms-overflow-y: scroll;" placeholder="click here to enter a note" rows="8"></textarea>

Upvotes: 0

Sam
Sam

Reputation: 89

Based on the order of the code you have here, if you re-arrange the code as the following:

$('#clinicalNotesEditable').on("keyup keydown keypress", function() {
  console.log('Key pressed on textarea by ID');
  //keyup keydown and keypress events are removed
});
$('#clinicalNotesEditable').off("keyup keydown keypress change blur");

$('#clinicalNotesEditable').on("click", function() {
  $(this).attr('disabled', false);
  $(this).attr('readonly', false);
  console.log('Click on textarea by ID');
});

keyup keydown keypress events are removed, and you will see the text "Click on textarea by ID" in the console. I am not sure if this is what you are trying to achieve. I ran the code and I could add text in textarea.

Upvotes: 0

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