Jquery empty select

Jquery empty select DEFAULT

This post will discuss how to remove all options from a dropdown list in JavaScript and jQuery.

1. Using jQuery

jQuery has .remove() method for removing elements from the DOM. We can use it to remove all from a element, as shown below:

JS


$(document).ready(function(){

    $('#submit').click(function(){

        $('#pets option').remove();

    })

});

HTML


<label for="pets">Choose your pets:</label>

 

<select id="pets">

    <option value="dog">Dog</option>

    <option value="cat">Cat</option>

    <option value="rabbit">Rabbit</option>

    <option value="parrot">Parrot</option>

</select>

 

<button id="submit">Remove All</button>


Edit in JSFiddle

 
Like the method, we can use the .empty() method to take the elements out of the DOM.

JS


$(document).ready(function(){

    $('#submit').click(function(){

        $('#pets').empty();

    });

});

HTML


<label for="pets">Choose your pets:</label>

 

<select id="pets">

    <option value="dog">Dog</option>

    <option value="cat">Cat</option>

    <option value="rabbit">Rabbit</option>

    <option value="parrot">Parrot</option>

</select>

 

<button id="submit">Remove All</button>


Edit in JSFiddle

 
Alternatively, you can use the .html() method to set the select element content empty.

JS


$(document).ready(function(){

    $('#submit').click(function(){

        $('#pets').html('');

    });

});

HTML


<label for="pets">Choose your pets:</label>

 

<select id="pets">

    <option value="dog">Dog</option>

    <option value="cat">Cat</option>

    <option value="rabbit">Rabbit</option>

    <option value="parrot">Parrot</option>

</select>

 

<button id="submit">Remove All</button>


Edit in JSFiddle

2. Using JavaScript

In plain JavaScript, you can get the list of all options using the method and then call JavaScript’s remove() method on each one of them.

JS


document.getElementById('submit').onclick=function(){

    varoptions=document.querySelectorAll('#pets option');

    options.forEach(o=>o.remove());

}

HTML


<label for="pets">Choose your pets:</label>

 

<select id="pets">

    <option value="dog">Dog</option>

    <option value="cat">Cat</option>

    <option value="rabbit">Rabbit</option>

    <option value="parrot">Parrot</option>

</select>

 

<button id="submit">Remove All</button>


Edit in JSFiddle

 
Another simple and fairly efficient solution is to use the browser’s property, which is also being used by the jQuery’s method.

JS


document.getElementById('submit').onclick=function(){

    document.querySelector('#pets').innerHTML='';

}


Edit in JSFiddle

That’s all about removing all options from a drop-down in JavaScript and jQuery.




Thanks for reading.

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Add, select, or clear items

Creating new options in the dropdown

New options can be added to a Select2 control programmatically by creating a new Javascript object and appending it to the control:

The third parameter of determines whether the item is "default selected"; i.e. it sets the attribute for the new option. The fourth parameter sets the options actual selected state - if set to , the new option will be selected by default.

Create if not exists

You can use to select the option if it already exists, and create it otherwise:

Selecting options

To programmatically select an option/item for a Select2 control, use the jQuery method:

You can also pass an array to make multiple selections:

Select2 will listen for the event on the element that it is attached to. When you make any external changes that need to be reflected in Select2 (such as changing the value), you should trigger this event.

Preselecting options in an remotely-sourced (AJAX) Select2

For Select2 controls that receive their data from an AJAX source, using will not work. The options won't exist yet, because the AJAX request is not fired until the control is opened and/or the user begins searching. This is further complicated by server-side filtering and pagination - there is no guarantee when a particular item will actually be loaded into the Select2 control!

The best way to deal with this, therefore, is to simply add the preselected item as a new option. For remotely sourced data, this will probably involve creating a new API endpoint in your server-side application that can retrieve individual items:

Notice that we manually trigger the event and pass along the entire object. This allows other handlers to access additional properties of the selected item.

Clearing selections

You may clear all current selections in a Select2 control by setting the value of the control to :

Sours: https://select2.org/programmatic-control/add-select-clear-items
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The HTML5 <select> is a very useful and popular element and is widely used in websites to present a list of items in a dropdown format. There are many ways you can populate data into the select element from various sources. In this article, I am going to show you few examples on how to add and remove, single or multiple options in the select element using jQuery.

jQuery provides some interesting methods that would help remove or add items (options) in the select element. You can either remove all the items or remove specific (single) item. Similarly, you can add multiple items to an existing list or remove all the items and add a fresh list of items.

Note: I have added the markup section in the first example only. Remaining examples uses the same markup, however, with different scripts.

1) Remove All Select Options

Let us assume, I have a list of books in an HTML5 <select> element and with click of a button, I wish to remove all the options from the list.

The Markup and the Script

<html> <head> <title>Remove All Select Options using jQuery</title> <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js"></script> </head> <body> <p>Click the “Remove All” button to remove all items in the Dropdown list!</p> <select id="selBooks" name="books" style="font:14px Verdana;"> <option value=""></option> <option value="Stategies Unplugged">Stategies Unplugged</option> <option value="jQuery Reference">jQuery Reference</option> <option value="HTML5 Fundamentals">HTML5 Fundamentals</option> <option value="Popular Science">Popular Science</option> </select> <input type="submit" id="submit" value="Remove All" /> </body> <script> $(document).ready(function () { $("#submit").click(function () { $('#selBooks') .find('option') .remove(); }); }); </script> </html>

Try it

The jQuery .find() method will find the <option> tags in the <select> element. The <option> tag confirms that the select element has values or items in it. Therefore, first we will find the options. The second method .remove() will remove all the options in the select element.

2) Remove a Specific Select Option

You can remove a specific option from the list, using jQuery .remove() method. However, you have to specify the name of the option. For example, I want to remove the option HTML5 Fundamentals from the list.

<script> $(document).ready(function () { $("#submit").click(function () { $('#selBooks option[value="HTML5 Fundamentals"]').remove(); }); }); </script>

Try it

3) Remove All Options but One

Now, this is an interesting scenario. I wish to keep one particular option or item in the list and remove the rest. Let me be more specific. From the list of books in the select element, I would remove all the books, but I’ll keep the book jQuery Reference in the list.

To do this, I’ll use the above statement with a != (not equal to) sign.

<script> $(document).ready(function () { $("#submit").click(function () { $('#selBooks option[value!="jQuery Reference"]').remove(); }); }); </script>

Try it

4) Add a New Option or Item to the List

To add new options (or items) in the select list, I’ll use jQuery .append() method. Read more about .append() method. Using this method, you can add a new option at the end of the list.

<script> $(document).ready(function () { $("#submit").click(function () { $('#selBooks') .append('<option value="Hunger Games">Hunger Games</option>') }); }); </script>

Try it

5) Add New Options after Removing Previous Options

This is another scenario where I wish to remove all the previous (default) options and add new set of options (items) in the <select> element.

<script> $("#submit").click(function () { $('#selBooks') .find('option') .remove() .end() .append('<option value="-Select-">-Select-</option>') .append('<option value="UX Design">Smashing UX Design</option>') .append('<option value="jQuery UI">jQuery UI</option>') }); </script>

Try it

In the above script, I am using 4 different jQuery methods. I have explained about .find(), .remove() and .append() methods in the above examples. However, this script has the .end() method.

Ref: Read more about .end() method

Once it removes all the options in the list using .remove() method, the .end() would take the object back to the beginning of the script, that is, at #selBooks and start adding new options using .append() method. Now, understand the flow using .end().

#selBooks -> Remove Options -> Revert Back to #selBooks -> Add New Options

Without the .end() method, it would remove all the options from the select element and it would simply bail out.

Conclusion

We have learnt about how to add and remove multiple or just one specific option from a <select> element. In the process, we have learned about few important jQuery methods, such as, .find(), .remove(), .append() and .end(). You must be now eager to explore more using these simple yet useful methods in your applications. If you have found something new, do not hesitate to share it with us here.

Thanks for reading ☺.

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Add Remove Select Box Dynamically using Jquery with Ajax PHP

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Empty select jquery

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