I am trying to show content depending on the option selected from the user. I tried this way
<select class="form-control" id="Intervencion" >
<option selected disabled></option>
<option (click)="show">Yes</option>
<option>No</option></select>
<div *ngIf="show"><p>Text to show</p></div>
I do not understand the problem. There is a special directive for this?
... You don't seem to know how basic HTML works. Sorry to say that, but you have to be aware of what you're doing is completely barbaric.
Here is the solution for you :
<select [(ngModel)]="intervencion">
<option value="yes">Yes</option>
<option value="no">No</option>
</select>
<div *ngIf="intervencion === 'yes'">Text to show</div>
That being given, you should really follow Angular's tutorials, because that's one of the first examples they give to explain how ngModel works.
I have a very weird requirement, wherein I am required to have no option selected by default in drop down menu in HTML. However,
I cannot use this,
<select>
<option></option>
<option>Option 1</option>
<option>Option 2</option>
<option>Option 3</option>
</select>
Because, for this I will have to do validation to handle the first option. Can anyone help me in achieving this target without actually including the first option as part of the select tag?
Maybe this will be helpful
<select>
<option disabled selected value> -- select an option -- </option>
<option>Option 1</option>
<option>Option 2</option>
<option>Option 3</option>
</select>
-- select an option -- Will be displayed by default. But if you choose an option, you will not be able to select it back.
You can also hide it using by adding an empty option
<option style="display:none">
so it won't show up in the list anymore.
Option 2
If you don't want to write CSS and expect the same behaviour of the solution above, just use:
<option hidden disabled selected value> -- select an option -- </option>
You could use Javascript to achieve this. Try the following code:
HTML
<select id="myDropdown">
<option>Option 1</option>
<option>Option 2</option>
<option>Option 3</option>
</select>
JS
document.getElementById("myDropdown").selectedIndex = -1;
or JQuery
$("#myDropdown").prop("selectedIndex", -1);
Today (2015-02-25)
This is valid HTML5 and sends a blank (not a space) to the server:
<option label=" "></option>
Verified validity on http://validator.w3.org/check
Verified behavior with Win7(IE11 IE10 IE9 IE8 FF35 Safari5.1) Ubuntu14.10(Chrome40, FF35) OSX_Yosemite(Safari8, Chrome40) Android(Samsung-Galaxy-S5)
The following also passes validation today, but passes some sort of space character to the server from most browsers (probably not desirable) and a blank on others (Chrome40/Linux passes a blank):
<option> </option>
Previously (2013-08-02)
According to my notes, the non-breaking-space entity inside the option tags shown above produced the following error in 2013:
Error: W3C Markup Validaton Service (Public): The first child option
element of a select element with a required attribute and without a
multiple attribute, and whose size is 1, must have either an empty
value attribute, or must have no text content.
At that time, a regular space was valid XHTML4 and sent a blank (not a space) to the server from every browser:
<option> </option>
Future
It would make my heart glad if the spec was updated to explicitly allow a blank option. Preferably using the briefest syntax. Either of the following would be great:
<option />
<option></option>
Test File
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Test</title>
</head>
<body>
<form action="index.html" method="post">
<select name="sel">
<option label=" "></option>
</select>
</form>
</body>
</html>
<td><b>Field Label:</b><br>
<select style='align:left; width:100%;' id='some_id' name='some_name'>
<option hidden selected>Select one...</option>
<option value='Value1'>OptLabel1</option>
<option value='Value2'>OptLabel2</option>
<option value='Value3'>OptLabel3</option></select>
</td>
Just put "hidden" on option you want to hide on dropdown list.
Solution that works by only using CSS:
A: Inline CSS
<select>
<option style="display:none;"></option>
<option>Option 1</option>
<option>Option 2</option>
<option>Option 3</option>
</select>
B: CSS Style Sheet
If you have a CSS file at hand, you can target the first option using:
select.first-opt-hidden option:first-of-type {
display:none;
}
<select class="first-opt-hidden">
<option></option>
<option>Option 1</option>
<option>Option 2</option>
<option>Option 3</option>
</select>
This should help:
https://www.w3schools.com/tags/att_select_required.asp
<form>
<select required>
<option value="">None</option>
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
<option value="mercedes">Mercedes</option>
<option value="audi">Audi</option>
</select>
<button type="submit">Submit</button>
</form>
Just a small remark:
some Safari browsers do not seem to respect neither the "hidden" attribute nor the style setting "display:none" (tested with Safari 12.1 under MacOS 10.12.6). Without an explicit placeholder text, these browsers simply show an empty first line in the list of options. It may therefore be useful to always provide some explanatory text for this "dummy" entry:
<option hidden disabled selected value>(select an option)</option>
Thanks to the "disabled" attribute, it won't be actively selected anyway.
<select required>
<option value="" disabled selected>None</option>
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
<option value="mercedes">Mercedes</option>
<option value="audi">Audi</option>
</select>
You can avoid custom validation in this case.
I understand what you are trying to do.The best and the most successful way is :
<select name='department' required>
<option value="">None</option>
<option value="Teaching">Teaching department</option>
<option value="nonTeaching">Non-teaching department</option>
</select>
I found it really interesting because I just experienced the same thing not so long time ago.
However, I came across to an example on the Internet about the solution regarding this.
Without any further ado, see the code fragment below:
<select>
<option value data-isdefault="true">--Choose one Option--</option>
<option>Option 1</option>
<option>Option 2</option>
<option>Option 3</option>
</select>
With that, it will stay un-submittable but selectable, anytime. More convenience for User Interface and great for User Experience.
Well that's all, I hope it helps. Cheers!
There is no HTML solution. By the HTML 4.01 spec, browser behavior is undefined if none of the option elements has the selected attribute, and what browsers do in practice is that they make the first option pre-selected.
As a workaround, you could replace the select element by a set of input type=radio elements (with the same name attribute). This creates a control of the same kind though with different appearance and user interface. If none of the input type=radio elements has the checked attribute, none of them is initially selected in most modern browsers.
I'm using Laravel 5 framework and #Gambi `s answer worked for me as well but with some changes for my project.
I have the option values in a database table and I use them with a foreach statement. But before the statement I have added an option with #Gambit suggested settings and it worked.
Here my exemple:
#isset($keys)
<select>
<option disabled selected value></option>
#foreach($keys as $key)
<option>{{$key->value)</option>
#endforeach
</select>
#endisset
I hope this helps someone as well. Keep up the good work!
Try this:
<h2>Favorite color</h2>
<select name="color">
<option value=""></option>
<option>Pink</option>
<option>Red</option>
<option>Blue</option>
</select>
The first option in the drop down would be blank.
In order to show please select a value in drop down and hide it after some value is selected . please use the below code.
it will also support required validation.
<select class="form-control" required>
<option disabled selected value style="display:none;">--Please select a value</option>
<option >Data 1</option>
<option >Data 2</option>
<option >Data 3</option>
</select>
If you are using Angular (2+), (or any other framework), you could add some logic. The logic would be: only display an empty option if the user did not select any other yet.
So after the user selected an option, the empty option disappears.
For Angular (9) this would look something like this:
<select>
<option *ngIf="(hasOptionSelected$ | async) === false"></option>
<option *ngFor="let option of (options$ | async)[value]="option.id">{{ option.title }}</option>
</select>
For those who are using <select multiple> (combobox; no dropdown), this worked for me:
<select size=1 disabled multiple>
<option hidden selected></option>
<option>My Option</option>
</select>
If you don't need any empty option at first, try this first line:
<option style="display:none"></option>
just use "..option hidden selected.." as default option
I guess a good idea would be to use the radio buttons, set #1 as default and hide it, give it for example a
name="init" and a value="null" or whatever, up to you!
this way the radio buttons list has a value definitely, but default of null can be used logically!
I think it's not necessary to elaborate further, since the idea can easily be implemented with display: none; or visibility: hidden;
... whereas I think the first one display: none; is the better option:
In react, you can give a dummy value (say -1) with select tag as below and same value can be used with this disabled option of yours. (WORKED FOR ME)
const nonEmpty = selected[identifierField] || false;
<select
onChange={(e) => {
onSelect(
options.find((option) => option[identifierField] === e.target.value)
);
}}
value={nonEmpty || -1}
>
<option disabled value={-1}>Select Option</option>
{options.map((option) => (
<option key={option[identifierField]} value={option[identifierField]}>
{option[displayField]}
</option>
))}
</select>
option style="display:none"
Is bad solution for Tablet: iPad Pro / iOS 15 / Safari
An unnecessary row in the dropdown appears, only for real devices. Doesn`t reproduce on the emulator.
Try this:
<select>
<option value="">
<option>Option 1
<option>Option 2
<option>Option 3
</select>
Validates in HTML5. Works with required attribute in select element. Can be re-selected. Works in Google Chrome 45, Internet Explorer 11, Edge, Firefox 41.
Can you have a vertical scroll in select html,,,
But keeping size="1" So when you click on the drop list it displays only around 5 options and the rest are viewed when you scroll.
I have a fiddel here
form name="#">
<div class="select-style2">
<select size="1" autocomplete="off">
<option hidden value="#">title</option>
<option value="#">2</option>
<option value="#">3 </option>
<option value="#">4 </option>
<option value="#">5 </option>
<option value="#">6 </option>
<option value="#">7 </option>
<option value="#">8 </option>
<option value="#">9 </option>
<option value="#">10 </option>
</select>
</div>
<input type="button" name="test" value="Go"
onClick="go()" id="btn">
As a previous answer points out, there isn't good styling options for select dropdowns.
However, the good news is, the answer to your question "Can you have a vertical scroll in select html" is yes. It's there by default when you have enough options in the list. But changing that number seems impossible with css.
See demo here: http://jsfiddle.net/VxNV9/1/
But you could create a custom drop down in jquery/javascript and style it however you want.
It is not possible to do in HTML. In SO, they have already discussed about this. Check It out Here.
May be there are other ways of achiving this through javascript or jQuery, with links on that page to some jQuery plugins which create a "fake" html select box that looks and behaves like one, but can have the height set.
I have a web page with search filters to narrow the results. You can click on a result to go to its details page, but if you used the browser's 'back' button to return to the search results, the filters all disappeared. Is it bad practice to wrap the filter options in a "FORM" element so that they'll persist?
before:
<div class="sort-results classes">
<select id="select-classes" name="sort-classes">
<option selected="selected" value="">Sort by</option>
<option value="price-ascending" data-order="asc" data-sort="class-price">Price: Lowest</option>
<option value="price-descending" data-order="desc" data-sort="class-price">Price: Highest</option>
...
</select>
</div>
after:
<div class="sort-results classes">
<form>
<select id="select-classes" name="sort-classes">
<option selected="selected" value="">Sort by</option>
<option value="price-ascending" data-order="asc" data-sort="class-price">Price: Lowest</option>
<option value="price-descending" data-order="desc" data-sort="class-price">Price: Highest</option>
...
</select>
</form>
</div>
The select element is a form element. So in reality you should be wrapping them in a form. Also since your users are submitting data that's yet another reason for it to be in a form.
There is nothing wrong with that (wrapping your form elements in a form).
Is it possible to dynamicaly resize the visible options in select tag in forms? I have the example:
<select size="1">
<option value='1'>1
<option selected value='2'>2
<option value='3'>3
<option value='4'>4
</select>
I would like to have visible all options (to setup size dynamically with css) when design page for printing. And also to see selected option(s) in another design (color, bold ...). For resize I tried:
select{
size:4;
}
but it doesn't work. I need a working solution at least for FF, IE, Safari ...
Do have any idea?
Thanks in advance!
You can use this way:
<select size="1" size="4">
<option value='1'>1</option>
<option selected value='2'>2</option>
<option value='3'>3</option>
<option value='4'>4</option>
</select>
And don't forget to close the </option>