Change text of selected option only while selected - javascript

I have a select box that allows the user to select a category for an article of clothing. The categories can have sub categories, so in order to display that hierarchy, I write the options like this:
Category Name
├─ Sub-category name
which looks like this:
Category Name
├─ Sub-category name
Unfortunately, when the user selects a sub-category, then the text that shows in the select box includes the structure characters. How do I only display the category name when an option is selected, but keep the structure HTML when they change options? Is there a better way to show the hierarchy of categories within the options? Optgroups don't work for me, because the user needs to be able to select the top-level categories also.
Here's what it looks like now.
http://jsfiddle.net/K6yfp/

Perhaps you are looking for optgroup
<select>
<optgroup label="Swedish Cars">
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
</optgroup>
<optgroup label="German Cars">
<option value="mercedes">Mercedes</option>
<option value="audi">Audi</option>
</optgroup>
</select>
FIDDLE

I have come up with a simple solution but could not workout more on it. Hope you will find it helpful.
HTML
<select id="Categories">
<option value="Shoes">Shoes</option>
<option value="Sneakers"> ├─Sneakers</option>
</select>
JS
$(document).ready(function(){
var SelectedCategory = $('#Categories').find('option:selected').val();
$('#Categories').bind("change",function() {
$(this).find('option:selected').attr('label',$(this).find('option:selected').val());
SelectedCategory = $(this).find('option:selected').val();
$(this).blur();
});
$('#Categories').focus(function(e){
e.stopPropagation();
$(this).find('option:selected').removeAttr('label');
}).blur(function(e){
e.stopPropagation();
$(this).find('option:selected').attr('label',$(this).find('option:selected').val());
});
});
Note: Do not forget to include the jQuery Library.
Check the Demo Fiddle.

Related

Have dropdown menus use value of previous dropdown

I have a "master dropdown menu" that contains four options (English, Spanish, Russian, Other) as the question asks their primary language.
Below this master dropdown menu contains other questions that asks similar questions and contain the same options (English, Spanish, Russian, Other).
I am wondering if it's possible to have the other dropdown menu options have the same value selected based on the 'master dropdown menu' option. So if John Smith chooses English in the master dropdown menu, the other questions will automatically have English selected in the other dropdown menus, while also allowing John to change an Answer - he may choose Spanish for question 3. I'm hoping the solution uses JavaScript or jQuery, as PHP won't be an option.
<label>What is your primary language?</label>
<select name="question1">
<option></option>
<option value="english">English</option>
<option value="spanish">Spanish</option>
<option value="russian">Russian</option>
<option value="other">Other</option>
</select>
<label>Language your spouse speaks?</label>
<select name="question2">
<option></option>
<option value="english">English</option>
<option value="spanish">Spanish</option>
<option value="russian">Russian</option>
<option value="other">Other</option>
</select>
<label>Language your children speak?</label>
<select name="question3">
<option></option>
<option value="english">English</option>
<option value="spanish">Spanish</option>
<option value="russian">Russian</option>
<option value="other">Other</option>
</select>
When selecting the value in the master dropdown menu you can set the value to the other dropdowns via JavaScript.
document.querySelector('select[name="question1"]').addEventListener('change', function(event) {
document.querySelector('select[name="question2"]').value = event.target.value;
document.querySelector('select[name="question3"]').value = event.target.value;
});
really simple solution but should work
JSFiddle
You can do this in jQuery as follows, using nextAll() to populate the other select items:
$('select').on('change', function() {
$(this).nextAll('select').val($(this).val());
});
(Note that you probably want to add a class to your selects as the above will operate on ALL select elements on the page).
Below you are adding an EventListener to to trigger when the first item is changed and assigning its value to rest of the selectors. Please update var firstDD and reminingDD valriables based on your requirement. Or better use specific IDs for each seletor so that it would be easy to understand.
$( document ).ready(function() {
var firstDD = $("select:first-child");
var reminingDD = $("select:not(:first-child)");
console.log(reminingDD);
firstDD.change(function () {
$(reminingDD).val($(firstDD).val());
});
});

Angular - Need to add multiple place-holders to a select drop-down

Although this may not be the best UI implementation, I have a drop-down list with several elements that must be grouped using multiple placeholders (e.g. ----- group 1 -----). I'd like to make the place-holders un-selectable.
I found a solution for a single placeholder here:
How do I add an unselectable and customizable placeholder to a select box
but it doesn't seem to be extendable to multiple place-holders.
Thanks in advance for any ideas.
Not angular specific, but can you use select option groups?
<select>
<optgroup label="Swedish Cars">
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
</optgroup>
<optgroup label="German Cars">
<option value="mercedes">Mercedes</option>
<option value="audi">Audi</option>
</optgroup>
</select>
Check out http://www.w3schools.com/tags/tag_optgroup.asp and their demo at
http://www.w3schools.com/tags/tryit.asp?filename=tryhtml_optgroup

How to hide and show select options

I'm very very new to jQuery. I Googled a lot before I'm asking, though it looks silly but for me its complicated.
I have a simple <select> list which has around 4 values like this image shown below.
Now at runtime, I want to hide the options and show based on index or value names in jQuery. How can I achieve this?.
My drop down box has a div region and simple select option with set of values. Please provide me a simple example.
Sample code
<Div ID = "abcd">
<select>
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
<option value="opel">Opel</option>
<option value="audi">Audi</option>
</select>
</div>
In this how to hide Volvo/Opel at run time?... like i want to show and hide these options dynamically.
Like Ex: When a button is pressed i want to hide Volvo. Similarly if another button is pressed i want to display Volvo back.
if you would like to hide the whole select you should give your select or the div containing your select an id and then you can do like :
<div id="mySelect" >your select tag here </div>
$('mySelect').show(); // or $('mySelect').hide();
http://api.jquery.com/hide/
http://api.jquery.com/show/
if you would like to hide the option you can do like below :
$("#edit-field-service-sub-cat-value option[value=" + title + "]").hide();
To be more specific to your code :
<div id="abcd">
<select id="mySelect">
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
<option value="opel">Opel</option>
<option value="audi">Audi</option>
</select>
</div>
title = 'volvo';
$("#mySelect option[value=" + title + "]").hide();
like in this post :
Hide options in a select list using jQuery
or remove it :
JQuery: Hide options of select according to option value

jQuery: find the <optgroup> for a selected value in a <select> element

I have a dropdown menu with different option groups. If someone selects an option, how can I check which optgroup it belongs to? For example if 'ferrari' were selected, how would you determine which optgroup it belongs to?
Feel free to use jQuery or raw javascript.
<select name="testSelect">
<optgroup label="fruits">
<option value="apples">Apples</option>
<option value="oranges">Oranges</option>
<option value="pears">Pears</option>
</optgroup>
<optgroup label="cars">
<option value="ford">ford</option>
<option value="toyota">toyota</option>
<option value="ferrari">ferrari</option>
</optgroup>
</select>
You can do this using jQuery:
$('select').change(function() {
var selected = $(':selected', this);
alert(selected.closest('optgroup').attr('label'));
});​
See a live example here: http://jsfiddle.net/jkeyes/zjLCp/1/
Update: Yes you could use parent http://jsfiddle.net/jkeyes/zjLCp/2/
alert(selected.parent().attr('label'));
Well, in pure js:
this.options[this.selectedIndex].parentNode.label
Not a single function call and less code to boot. :-)

dynamic dropdown list ( select boxes )

Here is the issue.
I have a select dropdown list.
<select name="listingtype" id="speedD" style="width:210px;">
<option>For Sale</option>
<option>For Rent</option>
</select>
And another select drop down list where the prices appear , which on page load it is empty..
So if user clicks For Sale: then the other select drop down list, loads price list like so:
<select name="valueA" id="speedF" style="width:200px;">
<option value="Any" selected="selected">Any</option>
<option value="50000">$50,000</option>
<option value="100000">$100,000</option>
<option value="150000">$150,000</option>
<option value="200000">$200,000</option>
<option value="250000">$250,000</option>
And if they choose For Rent. Select drop down is propagated like so:
<select name="valueA" id="speedF" style="width:200px;">
<option value="Any" selected="selected">Any</option>
<option value="100">$100</option>
<option value="150">$150</option>
<option value="200">$200</option>
<option value="250">$250</option>
<option value="300">$300</option>
</select>
I need this code to be client side, no need for server side. And just wanted to know what the cleanest method for doing this is.
Cheers.
First of all I recommend setting the value attribute in your option elements.
Example:
<option value="sale">For sale</option>
<option value="rent">For rent</option>
If you have not already heard of or seen the JavaScript library known as jQuery I strongly recommend checking it out! It can be very helpful when creating a dynamic site like this using minimal JavaScript.
I would do something like the following:
<html>
...
<body>
<div id="fillme"></div>
<script type="text/javascript">
if (document.yourformname.listingtype.value == "sale") {
//it is for sale
$('#fillme').html('<select name="valueA" id="speedF" style="width:200px;"><option value="Any" selected="selected">Any</option><option value="50000">$50,000</option><option value="100000">$100,000</option><option value="150000">$150,000</option><option value="200000">$200,000</option><option value="250000">$250,000</option></select>');
} else {
//fill it with the other elements
}
</script>
</body>
</html>
Now of course you could load it more dynamically with JSON or XML but that is up to you. I really recommend checking out the library:
http://jQuery.com
Use JavaScript to fill the empty select with options when the user selects an option (either onchange or onselect, forget which) in the For Sale/For Rent select.
EDIT: More specifically, have that second box be empty when the page loads. Store the options in arrays. Use a loop to create new OPTION elements based on each array item.

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