Hiding the currently selected option - javascript

I am surrently having an issue using JQuery. I have 2 select fields.
<select id="cat" name="cat_id">
<option value="2">Cat 2</option>
<option value="3">Cat 3</option>
<option value="4">Cat 4</option>
</select>
<select id="subcat" name="subcat_id">
<option class="subcats cat_2" value="1">Subcat 1</option>
<option class="subcats cat_2" value="2">Subcat 2</option>
<option class="subcats cat_3" value="3">Subcat 3</option>
<option class="subcats cat_3" value="4">Subcat 4</option>
<option class="subcats cat_3" value="5">Subcat 5</option>
<option class="subcats cat_0" value="0">No subcats for this cat</option>
</select>
And here is my JavaScript code
<script type="text/javascript">
var curval = $("#cat").val();
$(".subcats").hide(0);
$(".cat_"+curval).show(0);
$("#cat").change(function(){
var cat = $(this).val();
$(".subcats").removeAttr("selected").hide(0);
if($(".cat_"+cat).length == 0){$(".cat_0").show(0);}
else{$(".cat_"+cat).show(0);}
});
</script>
Here is the problem. When I change the value of the cats select, the options for the subcats are changed correctly. However, the currently selected field is still showing (Even if it doesn't correspond to the current cat).
Any help would be greatly appreciated.


You should change your code a little bit so on the hange event it can add the selected attribute to the first element in the available options :)
var curval = $("#cat").val();
$(".subcats").hide(0);
$(".cat_" + curval).show(0);
$("#cat").change(function() {
var cat = $(this).val();
$(".subcats").removeAttr("selected").hide(0);
if ($(".cat_" + cat).length == 0) {
$(".cat_0").attr("selected", "selected").show(0);
} else {
$(".cat_" + cat).eq(0).attr("selected", "selected");
$(".cat_" + cat).show(0);
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<select id="cat" name="cat_id">
<option value="2">Cat 2</option>
<option value="3">Cat 3</option>
<option value="4">Cat 4</option>
</select>
<select id="subcat" name="subcat_id">
<option class="subcats cat_2" value="1">Subcat 1</option>
<option class="subcats cat_2" value="2">Subcat 2</option>
<option class="subcats cat_3" value="3">Subcat 3</option>
<option class="subcats cat_3" value="4">Subcat 4</option>
<option class="subcats cat_3" value="5">Subcat 5</option>
<option class="subcats cat_0" value="0">No subcats for this cat</option>
</select>

Related

Show / Hide div if selected specific option value [closed]

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I need if selected number 1 or 2 or 7 the div id show but if the other number div hide
<select class="custom-select" id="selectEmployer">
<option selected>Vyberte</option>
<option value="1">Employer 1</option>
<option value="2">Employer 2</option>
<option value="3">Employer 3</option>
<option value="4">Employer 4</option>
<option value="5">Employer 5</option>
<option value="6">Employer 6</option>
<option value="7">Employer 7</option>
</select>
<div id="employer">SHOW</div>

You can do something like this:
$("#selectEmployer").change(function() {
$("#employer").hide();
if ($.inArray($(this).val(), ["1", "2", "7"]) > -1) {
$("#employer").show();
}
})
Demo
$("#selectEmployer").change(function() {
$("#employer").hide();
if ($.inArray($(this).val(), ["1", "2", "7"]) > -1) {
$("#employer").show();
}
})
#employer {
display: none;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select class="custom-select" id="selectEmployer">
<option selected>Vyberte</option>
<option value="1">Employer 1</option>
<option value="2">Employer 2</option>
<option value="3">Employer 3</option>
<option value="4">Employer 4</option>
<option value="5">Employer 5</option>
<option value="6">Employer 6</option>
<option value="7">Employer 7</option>
</select>
<div id="employer">SHOW</div>

Vanilla javascript solution would be:
var selectElem = document.getElementById("selectEmployer");
var divElem = document.getElementById("employer");
var showFor = [1,2,7];
divElem.style = "display:none;"
selectElem.addEventListener('change', function(e) {
var selectValue = parseInt(e.target.value);
if (showFor.includes(selectValue)) {
divElem.style = "";
} else {
divElem.style = "display:none;"
}
});
<select class="custom-select" id="selectEmployer">
<option selected>Vyberte</option>
<option value="1">Employer 1</option>
<option value="2">Employer 2</option>
<option value="3">Employer 3</option>
<option value="4">Employer 4</option>
<option value="5">Employer 5</option>
<option value="6">Employer 6</option>
<option value="7">Employer 7</option>
</select>
<div id="employer">SHOW</div>

Here I hope this does what you need it to
https://stackblitz.com/edit/angular-dm1w3a
<select class="custom-select" id="selectEmployer" (ngModelChange)="checkChange($event)" [(ngModel)]="selectedValue">
<option selected>Vyberte</option>
<option value="1">Employer 1</option>
<option value="2">Employer 2</option>
<option value="3">Employer 3</option>
<option value="4">Employer 4</option>
<option value="5">Employer 5</option>
<option value="6">Employer 6</option>
<option value="7">Employer 7</option>
</select>
<div id="employer" *ngIf="selectedValue === '1' || selectedValue === '2' || selectedValue === '7'">SHOW</div>

Disable certain options in a drop down select

Need to disable option "5" & "6" when the option value "2" is selected. It should display all the options in the List_2 when option "1" is selected. How can I do that using jQuery or any other method.
if ($('option[value=2]').prop('selected', true)) {
$('option[value=5]').prop('disabled', true);
}
<HTML>
<body>
<select id= "List_1">
<option value="1">Option 1</option>
<option value="2">Option 2</option>
</select>
<select id= "List_2">
<option value="4">Option 4</option>
<option value="5">Option 5</option>
<option value="6">Option 6</option>
</select>
</body>
</HTML>

Here you go with a solution https://jsfiddle.net/eurbvzk1/
var disabledDic = {
"1" : ["6"],
"2" : ["4", "5"],
"3" : []
}
$('select#list_1').on('change', function(){
$('select#list_2 option').each(function(){
$(this).removeAttr('disabled');
});
var disableOption = disabledDic[$(this).val()];
$.each( disableOption, function(i){
$('option[value="' + disableOption[i] + '"]').prop('disabled', 'disabled');
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select id="list_1">
<option value="1">Option 1</option>
<option value="2">Option 2</option>
<option value="3">Option 2</option>
</select>
<select id= "list_2">
<option value="4">Option 4</option>
<option value="5">Option 5</option>
<option value="6">Option 6</option>
</select>
Create a dictionary that will contain each first select option as key & value will be list of disabled options from second list.
Onchange method check the dictionary & loop through the disabled value.
Hope this will help you.

With plain JS:
document.getElementById('List_1').onchange = function() {
document.getElementById('List_2')[1].disabled = (document.getElementById('List_1').selectedIndex == 1);
document.getElementById('List_2')[2].disabled = (document.getElementById('List_1').selectedIndex == 1);
}
<select id="List_1">
<option value="1">Option 1</option>
<option value="2">Option 2</option>
</select>
<select id="List_2">
<option value="4">Option 4</option>
<option value="5">Option 5</option>
<option value="6">Option 6</option>
</select>

how to set scrolltop by javascript like jquery?

My html code:
<select class="sss" size="3">
<option value="1">value 1</option>
<option value="2">value 2</option>
<option value="3">value 3</option>
<option value="4">value 4</option>
<option value="5">value 5</option>
<option value="6">value 6</option>
<select>
and jquery code:
var $s = $('.sss');
var optionTop = $s.find('[value="3"]').offset().top;
var selectTop = $s.offset().top;
$s.scrollTop($s.scrollTop() + (optionTop - selectTop));
it is possible for me in jquery . (DEMO)
but I want to solve that in javascript. Is it possible?

I have solved that: following ans:
var s = document.getElementById("aa");
var optionTop = s.querySelector('option[value="2"]').offsetTop;
var selectTop = s.offsetTop;
s.scrollTop = s.scrollTop + (optionTop - selectTop);
<select id="aa" size="3">
<option value="1">value 1</option>
<option value="2">value 2</option>
<option value="3">value 3</option>
<option value="4">value 4</option>
<option value="5">value 5</option>
<option value="6">value 6</option>
<select>

Javascript: Refresh select box

This is my HTML
<select id="v-1" class="form-control input-sm">
<option value="624">Video 1</option>
<option value="625">Video 2</option>
<option value="626">Video 3</option>
<option value="627">Video 4</option>
<option value="628">Video 5</option>
<option value="629">Video 6</option>
<option value="630">Video 7</option>
</select>
In my javascript file, i have a function that removes some of the options by adding style="display: none;" to the option tag. For example:
<select id="v-1" class="form-control input-sm">
<option value="624" style="display: none;">Video 1</option>
<option value="625" style="display: none;">Video 2</option>
<option value="626">Video 3</option>
<option value="627" style="display: none;">Video 4</option>
<option value="628">Video 5</option>
<option value="629">Video 6</option>
<option value="630" style="display: none;">Video 7</option>
</select>
But when I call $('#v-1').val(), the result is 624. I wanted the result to be 626 or the first option that doesn't have the style, display: none.

$("#v-1 option").each(function()
{
if($(this).is(':visible')){
alert($(this).val());
return false;
}
});
Doesn't matter if using above code will help. Anyhow display : none won't hide the option items in Macintosh computer.
Instead I would suggest to remove the element from the select and include it on the fly when needed.

You could, probably, do:
jQuery("#v-1").find("option:visible:selected").val();
To get the value of the selected option (and visible).
If you just want to get the value of the first visible option, you could do:
jQuery("#v-1").find("option:visible:eq(0)").val();

Try this
$("#v-1 option").each(function()
{
if($(this).is(':visible')){
alert($(this).val());
return false;
}
});

Try this :
$('option:not(:checked)).val()
http://api.jquery.com/not-selector/

Use disable instead of style="display: none;" in your option
Html-
<select id="v-1" class="form-control input-sm">
<option value="624" disabled="disabled" >Video 1</option>
<option value="625" disabled="disabled">Video 2</option>
<option value="626">Video 3</option>
<option value="627" disabled="disabled">Video 4</option>
<option value="628">Video 5</option>
<option value="629">Video 6</option>
<option value="630" disabled="disabled">Video 7</option>
</select>
script-
$(document).ready(function(){
alert($("#v-1").val());
})
output: 626
Here's the fiddle http://jsfiddle.net/v52hb28u/

Getting a value from a list

I have a list like that:
<select size="1">
<option value="1">Option 1</option>
<option value="2">Option 2</option>
<option value="3">Option 3</option>
<option value="4">Option 4</option>
<option value="5">Option 5</option>
</select>
How can I get the value of this options with JavaScript (Getting the "1", "2", "3" and so on...).

if you add the id of "list" to <select> this should work: Example Here
document.getElementById('list').onchange = function( e) {
alert( this.value )
}
to get it directly without using this:
document.getElementById('list').value

document.getElementsByTagName("select")[0].value;
or
mySelection = function(element){
console.log(element.value);
}
<select onchange="mySelection(this);">

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