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Delete some elements in JavaScript

I'd like to delete Barcelona and Madrid items from my tag select with JavaScript.
My code HTML
<select id="menu">
<option value="Select">Select</option>
<option value="Madrid">Madrid</option>
<option value="Barcelona">Barcelona</option>
<option value="Sevilla">Barcelona</option>
</select>
My code JS
menu.textContext = " ";
I tried menu.textContext, However it doesn't work because it deletes everything.
Does someone know how I can do this?

You can use querySelectorAll to select all option tags with a specific value property:
menu.querySelectorAll('option[value="Barcelona"],option[value="Madrid"]').forEach(e => e.remove())
<select id="menu">
<option value="Select">Select</option>
<option value="Madrid">Madrid</option>
<option value="Barcelona">Barcelona</option>
<option value="Sevilla">Barcelona</option>
</select>
Alternatively, you can store the values you wish to delete in an array, select all option tags, loop through each and check whether the array includes its value. If so, delete that element:
const valuesToDelete = ['Madrid', 'Barcelona'];
menu.querySelectorAll('option').forEach(e => valuesToDelete.includes(e.value) ? e.remove() : '')
<select id="menu">
<option value="Select">Select</option>
<option value="Madrid">Madrid</option>
<option value="Barcelona">Barcelona</option>
<option value="Sevilla">Barcelona</option>
</select>

Select dropdown value by index using JQuery [duplicate]

If you know the Index, Value or Text. also if you don't have an ID for a direct reference.
This, this and this are all helpful answers.
Example markup
<div class="selDiv">
<select class="opts">
<option selected value="DEFAULT">Default</option>
<option value="SEL1">Selection 1</option>
<option value="SEL2">Selection 2</option>
</select>
</div>

A selector to get the middle option-element by value is
$('.selDiv option[value="SEL1"]')
For an index:
$('.selDiv option:eq(1)')
For a known text:
$('.selDiv option:contains("Selection 1")')
EDIT: As commented above the OP might have been after changing the selected item of the dropdown. In version 1.6 and higher the prop() method is recommended:
$('.selDiv option:eq(1)').prop('selected', true)
In older versions:
$('.selDiv option:eq(1)').attr('selected', 'selected')
EDIT2: after Ryan's comment. A match on "Selection 10" might be unwanted. I found no selector to match the full text, but a filter works:
$('.selDiv option')
.filter(function(i, e) { return $(e).text() == "Selection 1"})
EDIT3: Use caution with $(e).text() as it can contain a newline making the comparison fail. This happens when the options are implicitly closed (no </option> tag):
<select ...>
<option value="1">Selection 1
<option value="2">Selection 2
:
</select>
If you simply use e.text any extra whitespace like the trailing newline will be removed, making the comparison more robust.

None of the methods above provided the solution I needed so I figured I would provide what worked for me.
$('#element option[value="no"]').attr("selected", "selected");

You can just use val() method:
$('select').val('the_value');

By value, what worked for me with jQuery 1.7 was the below code, try this:
$('#id option[value=theOptionValue]').prop('selected', 'selected').change();

There are a number of ways to do this, but the cleanest approach has been lost among the top answers and loads of arguments over val(). Also some methods changed as of jQuery 1.6, so this needs an update.
For the following examples I will assume the variable $select is a jQuery object pointing at the desired <select> tag, e.g. via the following:
var $select = $('.selDiv .opts');
Note 1 - use val() for value matches:
For value matching, using val() is far simpler than using an attribute selector: https://jsfiddle.net/yz7tu49b/6/
$select.val("SEL2");
The setter version of .val() is implemented on select tags by setting the selected property of a matching option with the same value, so works just fine on all modern browsers.
Note 2 - use prop('selected', true):
If you want to set the selected state of an option directly, you can use prop (not attr) with a boolean parameter (rather than the text value selected):
e.g. https://jsfiddle.net/yz7tu49b/
$option.prop('selected', true); // Will add selected="selected" to the tag
Note 3 - allow for unknown values:
If you use val() to select an <option>, but the val is not matched (might happen depending on the source of the values), then "nothing" is selected and $select.val() will return null.
So, for the example shown, and for the sake of robustness, you could use something like this https://jsfiddle.net/1250Ldqn/:
var $select = $('.selDiv .opts');
$select.val("SEL2");
if ($select.val() == null) {
$select.val("DEFAULT");
}
Note 4 - exact text match:
If you want to match by exact text, you can use a filter with function. e.g. https://jsfiddle.net/yz7tu49b/2/:
var $select = $('.selDiv .opts');
$select.children().filter(function(){
return this.text == "Selection 2";
}).prop('selected', true);
although if you may have extra whitespace you may want to add a trim to the check as in
return $.trim(this.text) == "some value to match";
Note 5 - match by index
If you want to match by index just index the children of the select e.g. https://jsfiddle.net/yz7tu49b/3/
var $select = $('.selDiv .opts');
var index = 2;
$select.children()[index].selected = true;
Although I tend to avoid direct DOM properties in favour of jQuery nowadays, to future-proof code, so that could also be done as https://jsfiddle.net/yz7tu49b/5/:
var $select = $('.selDiv .opts');
var index = 2;
$select.children().eq(index).prop('selected', true);
Note 6 - use change() to fire the new selection
In all the above cases, the change event does not fire. This is by design so that you do not wind up with recursive change events.
To generate the change event, if required, just add a call to .change() to the jQuery select object. e.g. the very first simplest example becomes https://jsfiddle.net/yz7tu49b/7/
var $select = $('.selDiv .opts');
$select.val("SEL2").change();
There are also plenty of other ways to find the elements using attribute selectors, like [value="SEL2"], but you have to remember attribute selectors are relatively slow compared to all these other options.

Using jquery-2.1.4, I found the following answer to work for me:
$('#MySelectionBox').val(123).change();
If you have a string value try the following:
$('#MySelectionBox').val("extra thing").change();
Other examples did not work for me so that's why I'm adding this answer.
I found the original answer at:
https://forum.jquery.com/topic/how-to-dynamically-select-option-in-dropdown-menu

Exactly it will work try this below methods
For normal select option
<script>
$(document).ready(function() {
$("#id").val('select value here');
});
</script>
For select 2 option trigger option need to use
<script>
$(document).ready(function() {
$("#id").val('select value here').trigger('change');
});
</script>

$(elem).find('option[value="' + value + '"]').attr("selected", "selected");

You could name the select and use this:
$("select[name='theNameYouChose']").find("option[value='theValueYouWantSelected']").attr("selected",true);
It should select the option you want.

Answering my own question for documentation. I'm sure there are other ways to accomplish this, but this works and this code is tested.
<html>
<head>
<script language="Javascript" src="javascript/jquery-1.2.6.min.js"></script>
<script type="text/JavaScript">
$(function() {
$(".update").bind("click", // bind the click event to a div
function() {
var selectOption = $('.selDiv').children('.opts') ;
var _this = $(this).next().children(".opts") ;
$(selectOption).find("option[index='0']").attr("selected","selected");
// $(selectOption).find("option[value='DEFAULT']").attr("selected","selected");
// $(selectOption).find("option[text='Default']").attr("selected","selected");
// $(_this).find("option[value='DEFAULT']").attr("selected","selected");
// $(_this).find("option[text='Default']").attr("selected","selected");
// $(_this).find("option[index='0']").attr("selected","selected");
}); // END Bind
}); // End eventlistener
</script>
</head>
<body>
<div class="update" style="height:50px; color:blue; cursor:pointer;">Update</div>
<div class="selDiv">
<select class="opts">
<option selected value="DEFAULT">Default</option>
<option value="SEL1">Selection 1</option>
<option value="SEL2">Selection 2</option>
</select>
</div>
</body>
</html>

For setting select value with triggering selected:
$('select.opts').val('SEL1').change();
For setting option from a scope:
$('.selDiv option[value="SEL1"]')
.attr('selected', 'selected')
.change();
This code use selector to find out the select object with condition, then change the selected attribute by attr().
Futher, I recommend to add change() event after setting attribute to selected, by doing this the code will close to changing select by user.

$('#select option[data-id-estado="3"]').prop("selected",true).trigger("change");
// or
$('#select option[value="myValue"]').prop("selected",true).trigger("change");

Try this
you just use select field id instead of #id (ie.#select_name)
instead of option value use your select option value
<script>
$(document).ready(function() {
$("#id option[value='option value']").attr('selected',true);
});
</script>

I use this, when i know the index of the list.
$("#yourlist :nth(1)").prop("selected","selected").change();
This allows the list to change, and fire the change event.
The ":nth(n)" is counting from index 0

i'll go with:-
$("select#my-select option") .each(function() { this.selected = (this.text == myVal); });

/* This will reset your select box with "-- Please Select --" */
<script>
$(document).ready(function() {
$("#gate option[value='']").prop('selected', true);
});
</script>

For Jquery chosen if you send the attribute to function and need to update-select option
$('#yourElement option[value="'+yourValue+'"]').attr('selected', 'selected');
$('#editLocationCity').chosen().change();
$('#editLocationCity').trigger('liszt:updated');

if you want to not use jQuery, you can use below code:
document.getElementById("mySelect").selectedIndex = "2";

The $('select').val('the_value'); looks the right solution and if you have data table rows then:
$row.find('#component').val('All');

Thanks for the question. Hope this piece of code will work for you.
var val = $("select.opts:visible option:selected ").val();

There are a few suggestions why you should use prop instead of attr. Definitely use prop as I've tested both and attr will give you weird results except for the simplest of cases.
I wanted a solution where selecting from an arbitrarily grouped select options automatically selected another select input on that same page. So for instance, if you have 2 dropdowns - one for countries, and the other for continents. In this scenario, selecting any country automatically selected that country's continent on the other continent dropdown.
$("#country").on("change", function() {
//get continent
var originLocationRegion = $(this).find(":selected").data("origin-region");
//select continent correctly with prop
$('#continent option[value="' + originLocationRegion + '"]').prop('selected', true);
});
$("#country2").on("change", function() {
//get continent
var originLocationRegion = $(this).find(":selected").data("origin-region");
//select continent wrongly with attr
$('#continent2 option[value="' + originLocationRegion + '"]').attr('selected', true);
});
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="container">
<form>
<h4 class="text-success">Props to the good stuff ;) </h4>
<div class="form-row">
<div class="form-group col-md-6 col-sm-6">
<label>Conuntries</label>
<select class="custom-select country" id="country">
<option disabled selected>Select Country </option>
<option data-origin-region="Asia" value="Afghanistan">Afghanistan</option>
<option data-origin-region="Antartica" value="Antartica">Antartica</option>
<option data-origin-region="Australia" value="Australia">Australia</option>
<option data-origin-region="Europe" value="Austria">Austria</option>
<option data-origin-region="Asia" value="Bangladesh">Bangladesh</option>
<option data-origin-region="South America" value="Brazil">Brazil</option>
<option data-origin-region="Africa" value="Cameroon">Cameroon</option>
<option data-origin-region="North America" value="Canada">Canada</option>
<option data-origin-region="South America" value="Chile">Chile</option>
<option data-origin-region="Asia" value="China">China</option>
<option data-origin-region="South America" value="Ecuador">Ecuador</option>
<option data-origin-region="Australia" value="Fiji">Fiji</option>
<option data-origin-region="North America" value="Mexico">Mexico</option>
<option data-origin-region="Australia" value="New Zealand">New Zealand</option>
<option data-origin-region="Africa" value="Nigeria">Nigeria</option>
<option data-origin-region="Europe" value="Portugal">Portugal</option>
<option data-origin-region="Africa" value="Seychelles">Seychelles</option>
<option data-origin-region="North America" value="United States">United States</option>
<option data-origin-region="Europe" value="United Kingdom">United Kingdom</option>
</select>
</div>
<div class="form-group col-md-6 col-sm-6">
<label>Continent</label>
<select class="custom-select" id="continent">
<option disabled selected>Select Continent</option>
<option disabled value="Africa">Africa</option>
<option disabled value="Antartica">Antartica</option>
<option disabled value="Asia">Asia</option>
<option disabled value="Europe">Europe</option>
<option disabled value="North America">North America</option>
<option disabled value="Australia">Australia</option>
<option disabled value="South America">South America</option>
</select>
</div>
</div>
</form>
<hr>
<form>
<h4 class="text-danger"> Attributing the bad stuff to attr </h4>
<div class="form-row">
<div class="form-group col-md-6 col-sm-6">
<label>Conuntries</label>
<select class="custom-select country-2" id="country2">
<option disabled selected>Select Country </option>
<option data-origin-region="Asia" value="Afghanistan">Afghanistan</option>
<option data-origin-region="Antartica" value="Antartica">Antartica</option>
<option data-origin-region="Australia" value="Australia">Australia</option>
<option data-origin-region="Europe" value="Austria">Austria</option>
<option data-origin-region="Asia" value="Bangladesh">Bangladesh</option>
<option data-origin-region="South America" value="Brazil">Brazil</option>
<option data-origin-region="Africa" value="Cameroon">Cameroon</option>
<option data-origin-region="North America" value="Canada">Canada</option>
<option data-origin-region="South America" value="Chile">Chile</option>
<option data-origin-region="Asia" value="China">China</option>
<option data-origin-region="South America" value="Ecuador">Ecuador</option>
<option data-origin-region="Australia" value="Fiji">Fiji</option>
<option data-origin-region="North America" value="Mexico">Mexico</option>
<option data-origin-region="Australia" value="New Zealand">New Zealand</option>
<option data-origin-region="Africa" value="Nigeria">Nigeria</option>
<option data-origin-region="Europe" value="Portugal">Portugal</option>
<option data-origin-region="Africa" value="Seychelles">Seychelles</option>
<option data-origin-region="North America" value="United States">United States</option>
<option data-origin-region="Europe" value="United Kingdom">United Kingdom</option>
</select>
</div>
<div class="form-group col-md-6 col-sm-6">
<label>Continent</label>
<select class="custom-select" id="continent2">
<option disabled selected>Select Continent</option>
<option disabled value="Africa">Africa</option>
<option disabled value="Antartica">Antartica</option>
<option disabled value="Asia">Asia</option>
<option disabled value="Europe">Europe</option>
<option disabled value="North America">North America</option>
<option disabled value="Australia">Australia</option>
<option disabled value="South America">South America</option>
</select>
</div>
</div>
</form>
</div>
As seen in the code snippet, prop works correctly every time, but attr fails to select properly once the option has been selected once.
Keypoint: We're usually interested in the property of the attribute, so its safer to use prop over attr in most situations.

Get the name of all selected items from select multiple="multiple" options dropdown

I am trying to get the name of all selected items from select multiple="multiple" options dropdown.
In my html page, I have the following code snippet:
<select id="ddlCategory" ng-model="myCategory.myCategoryName" multiple>
<option selected="selected" value="1">Washroom</option>
<option value="2">Restaurant</option>
</select>
In my JS file, I have the following code snippet:
var categoryNameArray = $('#ddlCategory').val();
console.log("category = " + categoryNameArray[0];
However, the variable categoryNameArray only gives me the array of the selected items, what I want is the name of the selected items. Can someone tell me a way how I can make this work? Thanks!

Since val isn't giving you what you want, I'm going to assume you want an array of the text of the selected items.
You can get that like this:
var selectedTextArray = $("#ddlCategory option:selected").map(function() {
return $(this).text();
}).get();
That finds all the selected items, then uses map to get the text of each of them (wrapped in a jQuery object), then uses get to turn that jQuery object into an array.
You can probably use return this.text; rather than return $(this).text();, since HTMLOptionElement has a text property (which most elements don't), but I'd be sure to test with my target browsers to be sure.
Example:
$("#btn").on("click", function() {
var selectedTextArray = $("#ddlCategory option:selected").map(function() {
return $(this).text();
}).get();
console.log(selectedTextArray);
});
Select some items, then click
<input type="button" id="btn" value="here">
<br>
<select id="ddlCategory" ng-model="myCategory.myCategoryName" multiple>
<option value="1">Washroom</option>
<option value="2">Restaurant</option>
<option value="3">Service Station</option>
<option value="4">Drive-Thru</option>
</select>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
Example with this.text instead of $(this).text():
$("#btn").on("click", function() {
var selectedTextArray = $("#ddlCategory option:selected").map(function() {
return this.text;
}).get();
console.log(selectedTextArray);
});
Select some items, then click
<input type="button" id="btn" value="here">
<br>
<select id="ddlCategory" ng-model="myCategory.myCategoryName" multiple>
<option value="1">Washroom</option>
<option value="2">Restaurant</option>
<option value="3">Service Station</option>
<option value="4">Drive-Thru</option>
</select>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

val() returns the values on the selected options, in your case 1, 2 .... You should use text() to get the names of the selected options. You can loop through all selected options using each() method and get the selected values using text():
$('a').on('click', function(e) {
e.preventDefault();
$('#ddlCategory option:selected').each(function(i, selected) {
console.log($(selected).text());
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select id="ddlCategory" ng-model="myCategory.myCategoryName" multiple>
<option selected="selected" value="1">Washroom</option>
<option value="2">Restaurant</option>
</select>
Send
You can read more on how val() works here.
You can read more on how text() works here.

Try this:
var categoryNameArray =
$('#ddlCategory option:selected').map(function(){
return this.text;
}).get();
console.log("category = " + categoryNameArray);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select id="ddlCategory" ng-model="myCategory.myCategoryName" multiple>
<option selected="selected" value="1">Washroom</option>
<option selected="selected" value="2">Restaurant</option>
<option value="3">Coffee Shop</option>
<option value="4">Hotels</option>
</select>

Easy way to get all selected value is $('#ddlCategory').val();

Drop down selection using HTML/jQuery

I want to build a drop down menu that the second selection will be displayed if the first selection data belongs to a specific category.
As you can see below, the first selection will be about COUNTRIES. If the country selected has states, then a second drop down selection will be displayed, containing the states of that country.
1)Is there a tag (in my code "xyz") that i can use it to separate the countries in "state" and "no-state" categories? If there is, how can i read the value of the "xyz" tag?
2) If i use the:
<option class="no-state" value="Germany">Germany</option>
and then use the jQuery to read it it will give me the value GermanySpain (which is correct but not what i want)
$('.no-state').val();
HTML PART
<div id="country">
<select>
<option xyz="no-state" value="Germany">Germany</option>
<option xyz="state" value="USA">USA</option>
<option xyz="no-state" value="Spain">Spain</option>
</select>
</div>
<div id="state" style="display:none" >
<select>
<option value="Utah">Utah</option>
<option value="New York">New York</option>
<option value="California">California</option>
</select>
</div>
JQUERY PART
$(document).ready(function(){
$('#country').change(function() {
if (the value of "xyz" tag is === 'no-state')
{
$('div#state').hide();
}
else
{
$('div#state').show();
}
});
});
What can i do to address this issue?
Thanks.

Added a variable to keep if a country has states or not according your custom attribute xyz
js
$(document).ready(function(){
$('#country').change(function() {
var hasStates = $(this).find("option:selected").attr("xyz");
if (hasStates == 'no-state')
{
$('div#state').hide();
}
else
{
$('div#state').show();
}
});
});
fiddle

I think you can make use of .data() jQuery method, which reads the data-* a valid html5 attribute, but you have to change your markup to fix and use this script:
$('#country select').change(function() {
if ($(this).find('option:selected').data('xyz') === 'no-state') {
$('div#state').hide();
} else {
$('div#state').show();
}
});
You have to add a data-* prefix to get to it and make it a valid html5 attribute.
<select>
<option data-xyz="no-state" value="Germany">Germany</option>
<option data-xyz="state" value="USA">USA</option>
<option data-xyz="no-state" value="Spain">Spain</option>
</select>

Using the class attribute isn't that bad:
HTML
<select>
<option class="no-state" value="Germany">Germany</option>
<option class="state" value="USA">USA</option>
<option class="no-state" value="Spain">Spain</option>
</select>
JavaScript
$(document).ready(function(){
$('#country').change(function() {
var $sel = $(this).find("option:selected");
if ($sel.hasClass("no-state"))
{
$('div#state').hide();
}
else
{
$('div#state').show();
}
});
});
Fiddle

First of all I would change your html structure to:
<select id="country">
<option xyz="no-state" value="Germany">Germany</option>
<option xyz="state" value="USA">USA</option>
<option xyz="no-state" value="Spain">Spain</option>
</select>
<select id="state" style="display: none;">
<option value="Utah">Utah</option>
<option value="New York">New York</option>
<option value="California">California</option>
</select>
Then you can simply do:
$("#country").change(function() {
var hasState = $(this).find(':selected').attr('xyz') === "state";
$("#state").toggle(hasState);
});
Here is a fiddle to see it in action.

populate second dropdown based on selected value of first dropdown

I have two dropdown i want when i select for example from dropdown test1 option with value a
the second dropdown test2 show only the options that have value a
<select name="test1" id="test1" onchange="document.getElementById('test2').value=this.value">
<option value="Select">Select</option>
<option value="a">a</option>
<option value="b">b</option>
<option value="c">c</option>
</select>
<select id="test2" name="test2">
<option value="Select">Select</option>
<option value="a">a</option>
<option value="a">b</option>
<option value="a">c</option>
<option value="b">1</option>
<option value="b">2</option>
<option value="b">3</option>
<option value="c">c</option>
</select>

Or you can go this way:
jQuery(document).ready(function($){
var options = $('#test2 option');
$('#test1').on('change', function(e){
$('#test2').append(options);
$('#test2 option[value!=' + $(this).val() +']').remove();
});
});
fiddle

Since you've tagged this with JQuery, if I were to not alter your HTML at all, you could do this by changing the JS in your onchange from this:
document.getElementById('test2').value=this.value
. . . to this:
$("test2").find("option").hide();
$("test2").find("[value^='" + $("test1").val() + "']").show();
That would hid all of the options in the "test2" dropdown, and then show all of the ones that have a value that starts with the value of the currently selected "test1" option.
Note: this will also work if you chose to update the code to only use the "test1" values as a prefix for the "test2" values. ;)
UPDATE: Fixed a typo in the code.

Like it was said, you really don't want to do it this way as each option should have a unique value....but here is one way to accomplish it: jsFiddle
Using jQuery, you could check for the value of the selected option in test1, hide all those in test2 that don't match then show those with a matching value.
$('#test1').on('change', function() {
$('#test2 option:not(option[value='+$(this).val()+'])').hide();
$('#test2 option[value='+$(this).val()+']').show();
});