How to implement autocomplete in multiple select dropdown with Materialize CSS? - javascript

I want to implement autocomplete feature in Multiple Select type of Dropdown with Materialize CSS (materializecss.com)
There are multiple values which I have to select. Currently, as the list is very long we have to scroll down. I want to implement an autocomplete search functionality that selects multiple dropdown values based on the current Materialize CSS Framework used.

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Limitation for semantic drop-down multiple selection

I am trying to have a Semantic UI dropdown menu which allows additions but I don't want user to have more than 4 selection.
When user added 4 items to his selection, 4 labels will be added, now he shouldn't be able to add more labels to his selection.
How can I achieve that?

You can use the select2.js for the multiple select drop down with limitation.
https://select2.org/getting-started/basic-usage
For more appropriate solution please share your code here.

How to change dropdown option and price together

I have a select menu with multiple options. Using jQuery I was trying to pre-populate the dropdown. I've tried using this code:
jQuery("select#attribute150").val("Double").click();
I can visually see that the option has been selected, however the actual price has not been changed. I've also tried:
jQuery("select#attribute150").val("Double").change();
URL to the dropdown is here. The dropdown I want to change is "Size".

Multi-select dropdown menu

I am working on creating a website using node.js and express. I want to add a multi-select dropdown box. I have a Javascript object which contains a variety of properties and would like to populate the dropdown box with all the property values. I would also like to be able to add new options to the dropdown and have them visible without having to refresh the page. Is there someway to accomplish this? Perhaps using JQuery? I would appreciate if someone could provide an example.
I've tried this example, but I would like to have a multi select checkbox for the dropdown. The example requires the user to press ctrl while clicking to select multiple options.
Thanks!

$("#select_id").append("<option value='value'>name</option>");

Bootstrap optgroup selection

I am using bootstrap select plugin with bootstrap 3.0.2, which fulfils most of my requirements.
The only additional functionality I want is to be able to select an optgroup by clicking it.
For example I would like to select Picnic (picture below) just like any other option,
Bootsrap select page

This has little to do with Bootstrap. optgroups in HTML are not designed to selected. My suggestion would be to drop them all together and just make them normal options with a class and style them differently. However keep in mind, that many browsers are limited to how you can style options, so make sure you test this in multiple browsers.

Need a js plugin with autocomplete and list items with icons

I have been browsing a lot for a javascript plugin or the workaround for dropdown combobox with autocomplete feature and list items with icons.
http://www.marghoobsuleman.com/mywork/jcomponents/image-dropdown/samples/index.html
I found the above link on one of the solutions in stackoverflow putting images with options in a dropdown list
But this plugin does not contain autocomplete feature. I also need that the icon still displays in the selection after i select one of the list items. Anybody knows any workaround or any js plugin with these features?

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