Quick way to clear all selections on a multiselect enabled <select> with jQuery?

Do I have to iterate through ALL the and set remove the 'selected' attribute o开发者_StackOverflowr is there a better way?

Simply find all the selected <option> tags within your <select> and remove the selected attribute:

$("#my_select option:selected").removeAttr("selected");

As of jQuery 1.6, you should use .prop instead of removing the attribute:

$("#my_select option:selected").prop("selected", false);

In order to clear all selection, I am using like this and its working fine for me. here is the script:

 $("#ddlMultiselect").multiselect("clearSelection");

 $("#ddlMultiselect").multiselect( 'refresh' );

Shortest and quickest way to remove all the selection, is by passing empty string in jQuery .val() function :

$("#my_select").val('')

This is the best way to clear a multi-select or list box:

 $("#drp_assign_list option[value]").remove();

In JQuery:

  $("#id option:selected").prop("selected", false);
  $("#id").multiselect('refresh');

$('.clearAll').on('click', function() {
  $('.dropdown').val([]);
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<select class="dropdown" multiple>
  <option value="volvo">Volvo</option>
  <option value="saab">Saab</option>
  <option value="opel">Opel</option>
  <option value="audi">Audi</option>
</select>

<button class='clearAll'>Clear All Selection</button>

$("#ddlMultiselect").val('').trigger("change");

for multi-select drop-down, it will clear displayed text.

jQuery's :selected selector is probably what you are looking for.

In javascript,

You can use the list of all options of multiselect dropdown which will be an Array.Then loop through it to make Selected attributes as false in each Objects.

for(var i=0;i<list.length;i++)
{
   if(list[i].Selected==true)
    {
       list[i].Selected=false;
    }
}

You can pass an empty array to unselect all the selection. Here goes an example. From documentation

val() allows you to pass an array of element values. This is useful when working on a jQuery object containing elements like , , and s inside of a . In this case, the inputs and the options having a value that matches one of the elements of the array will be checked or selected while those having a value that doesn't match one of the elements of the array will be unchecked or unselected, depending on the type.

$('.clearAll').on('click', function() {
  $('.dropdown').val([]);
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<select class="dropdown" multiple>
  <option value="volvo">Volvo</option>
  <option value="saab">Saab</option>
  <option value="opel">Opel</option>
  <option value="audi">Audi</option>
</select>

<button class='clearAll'>Clear All Selection</button>

$('.selectpicker').selectpicker('deselectAll');

https://developer.snapappointments.com/bootstrap-select/methods/

I've tried many solutions and came up with this.

Options and selections of the dropdown are cleared using this only

$("#my-multi option:selected").prop("selected", false);
$("#my-multi option").remove();

But the interface is not updated. So you have to do this

$('#my-multi').multiselect('rebuild');

Hence, the final code is

$("#my-multi option:selected").prop("selected", false);
$("#my-multi option").remove();
$('#my-multi').multiselect('rebuild');

Suggestions and improvements are welcome.

Assuming you are using Bootstrap multiselect dropdown by David Stutz

$('#selectId').multiselect('deselectAll', false);

But for some reason it does not work inside initialization method