Bootstrap select dropdown list placeholder

问题

I am trying to make a dropdown list that contains a placeholder. It doesn't seem to support placeholder="stuff" as other forms do. Is there a different way to obtain a placeholder in my dropdown?

回答1:

Yes just "selected disabled" in the option.

<select>
    <option value="" selected disabled>Please select</option>
    <option value="">A</option>
    <option value="">B</option>
    <option value="">C</option>
</select>

Link to fiddle

You can also view the answer at

https://stackoverflow.com/a/5859221/1225125

回答2:

Use hidden:

<select>
    <option hidden >Display but don't show in list</option>
    <option> text 1 </option>
    <option> text 2 </option>
    <option> text 3 </option>
</select>

回答3:

dropdown or select doesn't have a placeholder because HTML doesn't support it but it's possible to create same effect so it looks the same as other inputs placeholder

    $('select').change(function() {
     if ($(this).children('option:first-child').is(':selected')) {
       $(this).addClass('placeholder');
     } else {
      $(this).removeClass('placeholder');
     }
    });

.placeholder{color: grey;}
select option:first-child{color: grey; display: none;}
select option{color: #555;} // bootstrap default color

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select class="form-control placeholder">
   <option value="">Your Placeholder Text</option>
   <option value="1">Text 1</option>
   <option value="2">Text 2</option>
   <option value="3">Text 3</option>
</select>

if you want to see first option in list remove display property from css

回答4:

If you are initializing the select field through javascript, the following can be added to replace the default placeholder text

noneSelectedText: 'Insert Placeholder text'

example: if you have:

<select class='picker'></select>

in your javascript, you initialize the selectpicker like this

$('.picker').selectpicker({noneSelectedText: 'Insert Placeholder text'});  

回答5:

Add hidden attribute:

<select>
    <option value="" selected disabled hidden>Please select</option>
    <option value="">A</option>
    <option value="">B</option>
    <option value="">C</option>
</select>

回答6:

Try this:

<select class="form-control" required>
<option value="" selected hidden>Select...</option>

when using required + value="" then user can not select it using hidden will make it hidden from the options list, when the user open the options box

回答7:

Most of the options are problematic for multi-select. Place Title attribute, and make first option as data-hidden="true"

<select class="selectpicker" title="Some placeholder text...">
    <option data-hidden="true"></option>
    <option>First</option>
    <option>Second</option>
</select>

回答8:

Try @title = "stuff". It worked for me.

回答9:

All this options are.... improvisations. Bootstrap already offers a solution for this. If you want to change the placeholder for all your dropdown elements you can change the value of

noneSelectedText in the bootstrap file.

To change individualy, you can use TITLE parameter.

example:

<div class="form-group">
          <label class="control-label col-xs-2" id="country">Continent:</label>
          <div class="col-xs-9">
            <select name="zones[]" class="selectpicker" title="All continents" id="zones" multiple >
              <option value="Africa">Africa</option>
              <option value="Asia">Asia</option>
              <option value="North America">America North</option>
              <option value="South America">America South</option>
              <option value="Antarctica">Antarctica</option>
              <option value="Australia">Australia</option>
              <option value="Europe">Europe</option>
            </select>
          </div>
        </div>

回答10:

1. in bootstrap-select.js Find title: null, and remove it.
2. add title="YOUR TEXT" in <select> element.
3. Fine :)

---

Example:

<select title="Please Choose one item">
    <option value="">A</option>
    <option value="">B</option>
    <option value="">C</option>
</select>

回答11:

I think, the Dropdown box with a class and JQuery code to disable the first option for user to select, will work perfectly as Select Box placeholder.

<select class="selectboxclass">
   <option value="">- Please Select -</option>
   <option value="IN">India</option>
   <option value="US">America</option>
</select>

Make the first option disabled by JQuery.

<script>
$('select.selectboxclass option:first').attr('disabled', true);
</script>

This will make the first option of Dropdown as Placeholder and user will no longer able to select the first option.

Hope It helps!!

回答12:

Here's another way to do it

<select name="GROUPINGS[xxxxxx]" style="width: 60%;" required>
    <option value="">Choose Platform</option>
<option value="iOS">iOS</option>
    <option value="Android">Android</option>
    <option value="Windows">Windows</option>
</select>

"Choose Platform" becomes the placeholder and the 'required' property ensures that the user has to select one of the options.

Very useful, when you don't want to user field names or Labels.

回答13:

Using Bootstrap, This is what you can do. Using class "text-hide", the disabled option will be shown at first but not on the list.

<select class="form-control" >
  <option selected disabled class="text-hide">Title</option>
  <option>A</option>
  <option>B</option>
  <option>C</option>
</select>

回答14:

Bootstrap select has an noneSelectedText option. You can set it via data-none-selected-text attribute. Documentation.

回答15:

For .html page

<select>
    <option value="" selected disabled>Please select</option>
    <option value="">A</option>
    <option value="">B</option>
    <option value="">C</option>
</select>

for .jsp or any other servlet page.

<select>
    <option value="" selected="true" disabled="true">Please select</option>
    <option value="">A</option>
    <option value="">B</option>
    <option value="">C</option>
</select>

回答16:

Using bootstrap, if you need to also add some values to the option to use for filters or other stuff you can simply add the class "bs-title-option" to the option that you want as a placeholder:

<select class="form-group">
   <option class="bs-title-option" value="myVal">My PlaceHolder</option>
   <option>A</option>
   <option>B</option>
   <option>c</option>
</select>

Bootstrap adds this class to the title attribute.

回答17:

Solution for Angular 2

Create a label on top of the select

<label class="hidden-label" for="IsActive"
    *ngIf="filterIsActive == undefined">Placeholder text</label>
<select class="form-control form-control-sm" type="text" name="filterIsActive"
    [(ngModel)]="filterIsActive" id="IsActive">
    <option value="true">true</option>
    <option value="false">false</option>
</select>

and apply CSS to place it on top

.hidden-label {
    position: absolute;
    margin-top: .34rem;
    margin-left: .56rem;
    font-style: italic;
    pointer-events: none;
}

pointer-events: none allows you to display the select when you click on the label, which is hidden when you select an option.

angular html css

回答18:

<option value="" defaultValue disabled> Something </option>

you can replace defaultValue with selected but that would give warning.

来源：https://stackoverflow.com/questions/22822427/bootstrap-select-dropdown-list-placeholder