We Keep Coding

How to multiselect duplicate values using select2 library

I am select using select2-multiple function, and here is my code
<select data-placeholder="Choose Colors" class="chosen-select" multiple tabindex="4">
<option value=""></option>
<option value="Red">Red</option>
<option value="Green">Green</option>
<option value="Orange">Orange</option>
<option value="Orange">Orange</option>
</select>
I want the user can add Orange value multiple times if he wants. By default select2 multiple didnot accepts duplicate value. Can someone here please help

You can select both if you hold the shift key by clicking on the option.
Maybe you should do Orange-1 and Orange-2 as Value. So if you want to submit it in a form you have two different GET or POST parameter.
Check this example: https://www.w3schools.com/tags/att_select_multiple.asp
<select data-placeholder="Choose Colors" class="chosen-select" multiple tabindex="4">
<option value=""></option>
<option value="Red">Red</option>
<option value="Green">Green</option>
<option value="Orange-1">Orange</option>
<option value="Orange-2">Orange</option>
</select>

Can't select multi-select items. Jquery

I have implemented the following multiselect into my project.
http://loudev.com/
And I have done everything as I should (as far as I know) the layout is looking as it should, the css and javascript is running but when i hover over an option, it isn't clickable, it treats it as a line of text, not a clickable object.
Here is the code for the select input and where it is initialised in javascript.
<select multiple="multiple" class="form-control" id="my-select" name="my-select[]">
<option value="elem_1">elem 1</option>
<option value="elem_2">elem 2</option>
<option value="elem_3">elem 3</option>
<option value="elem_4">elem 4</option>
<option value="elem_100">elem 100</option>
</select>
$('#my-select').multiSelect();

Unselect all elements from a Materialize multiple dropdown except first

I have a multi-select drop down as following, where I have selected the multiple options.
<select class="select2 mysql_attr" id="mysql_attr" name="mysql_attr[]" title="Student " multiple >
<option value="0"> All</option>
<option value="1">Sub 1</option>
<option value="2">Sub 2</option>
<option value="3">Sub 3</option>
<option value="4">Sub 4</option>
</select>
I have a first option called "All". When this option is clicked i want all selected items should be deselected except this and if other options click this option should be deselect.
I Search a lot but din't find anything.
How can I accomplish this using Materialize?

struts tag library - select tag

I have a dropdown list. When user click on the drop down list, I need to show first 4 items in the list and the scroll bar so that users can scroll and see the remaining items in the list.
Please find the dropdown list sample fiddle below. The same way as shown in fiddle when user click on the dropdown list, Option 1, Option 2, Option 3, Option 4 should be shown with the scrollbar to scroll and see remaining options in the list.
<select>
<option value="one">Option 1</option>
<option value="two">Option 2</option>
<option value="three">Option 3</option>
<option value="four">Option 4</option>
<option value="five">Option 5</option>
<option value="siz">Option 6</option>
<option value="seven">Option 7</option>
<option value="eight">Option 8</option>
</select>
---EDITED---
The above code is not working in IE.
In IE it's showing the scrollar but when i select the item from the dropdown list, an alert box is displayed with error message and i cannot select any date from the dropdown list. I tried to debug and see if any errors using developer tools, but there are no errors shown.
Internet Explorer has stopped working A problem caused the progrm to stop working correctly.Please close the program.

You can use onmousedown to dynamically expand the select list on click and onchange/onblur event handlers to go back:
<select onmousedown="if (this.options.length > 4) this.size = 4;" onchange="this.size = 0;" onblur="this.size = 0;">
<option value="one">Option 1</option>
<option value="two">Option 2</option>
<option value="three">Option 3</option>
<option value="four">Option 4</option>
<option value="five">Option 5</option>
<option value="siz">Option 6</option>
<option value="seven">Option 7</option>
<option value="eight">Option 8</option>
</select>

How do I add a blank <option> element to a <option> list?

Situation:
I have an option list like
<select class="database-column-name" name="caseid">
<option value="1">1</option>
<option value="2">1</option>
<option value="3">1</option>
</select>
and by default there is no option selected, but when you select an option you can't go back to selecting none again! This messes up the user experience of my page because I need the user to be able to selected no option at all.
Question:
Is there a hack to get around this?

Is as simple as this
<select class="database-column-name" name="caseid">
<option value=" ">--Select--</option>
<option value="1">1</option>
<option value="2">1</option>
<option value="3">1</option>
</select>

$("select.database-column-name option").prop("selected", false);
You could have a "clear selection" button or something fire this code.

The preceding answer is a really good choice. The only recommendation that I would add to it is to make the value for the first item a "0"(zero), which allows your post-processing code to look for a specific value to ensure "no selection". Granted, you can look for " ", but that's easy to confuse with "".
<select class="database-column-name" name="caseid">
<option value="0">--Select--</option>
<option value="1">1</option>
<option value="2">1</option>
<option value="3">1</option>
If you want to have an actual blank show, rather than a phrase like "--Select--" then simply replace the "--Select--" text with a space.
<html>
<body>
<select class="database-column-name" name="caseid">
<option value="0"> </option>
<option value="1">option 1</option>
<option value="2">option 2</option>
<option value="3">option 3</option>
</select>
The "value" portion is not displayed and is present to simplify code-based analysis of the selected option. In this case, a value of "0" would mean that no option has been selected.