I am trying to use an if else statement to add 'selected' to an option from the select menu. The only problem I have is that I'm not sure why once I go back to value 'top' option[1] is still 'selected'. It's like the first if doesn't execute the condition, although i see if i do the console log it does change to the first if...
<select id='selectdesign'>
<option value="0"></option>
<option value="top">top</option>
<option value="jeans">jeans</option>
</select>
<select id='selectmenu'>
<option value="0"></option>
<option value="1">top-blue</option>
<option value="2">top-pink</option>
<option value="3">bottoms-red</option>
<option value="4">bottoms-violet</option>
</select>
function selectOption(element) {
if (element.value == 'top') {
console.log('if');
option[2].setAttribute('selected', true);
} else if (element.value == 'jeans') {
console.log('else if');
option[1].setAttribute('selected', true);
}
}
i am calling the selectOption function on selectDesign on change
You need to access the right value of the select element, like
element.options[element.selectedIndex].value
and use
document.getElementById('selectmenu').selectedIndex = 1;
for setting an index of the options.
function selectOption(element) {
if (element.options[element.selectedIndex].value == 'top') {
document.getElementById('selectmenu').selectedIndex = 1;
} else if (element.options[element.selectedIndex].value == 'jeans') {
document.getElementById('selectmenu').selectedIndex = 3;
}
}
<select id="selectdesign" onchange="selectOption(this);">
<option value="0"></option>
<option value="top">top</option>
<option value="jeans">jeans</option>
</select>
<select id="selectmenu">
<option value="0"></option>
<option value="1">top-blue</option>
<option value="2">top-pink</option>
<option value="3">bottoms-red</option>
<option value="4">bottoms-violet</option>
</select>
Version with an object for preselecting options.
function selectOption(element) {
var indices = {
top: 1,
jeans: 3,
},
value = element.options[element.selectedIndex].value
if (value in indices) {
document.getElementById('selectmenu').selectedIndex = indices[value];
}
}
<select id="selectdesign" onchange="selectOption(this);">
<option value="0"></option>
<option value="top">top</option>
<option value="jeans">jeans</option>
</select>
<select id="selectmenu">
<option value="0"></option>
<option value="1">top-blue</option>
<option value="2">top-pink</option>
<option value="3">bottoms-red</option>
<option value="4">bottoms-violet</option>
</select>
Related
I have something like this:
<select multiple>
<option value="all-item" selected>All</option>
<option value="saab">Saab</option>
<option value="opel">Opel</option>
<option value="audi">Audi</option>
</select>
What I need:
After init only "All" is selected (done).
If the customer selected other options, "all-items" should be unselected.
If the customer has select e.q 2 options and after that will select "all-item", an only first option should be select and another should be unselected.
I tried to do it like that:
$("#all-item").on('focus', function() {
$("#selecty option").each(function(){
$(this).attr("selected", "selected");
});
});
<select multiple>
<option value="all-item" selected>All</option>
<option value="saab">Saab</option>
<option value="opel">Opel</option>
<option value="audi">Audi</option>
</select>
but doesn't work.
Anybody can help?
I made it with vanilla JS, because you don't need JQuery for that :
function handleChange(element) {
if(element.value === 'all-item') {
const options = [...element.options];
for (let opt of options) {
if (opt.value !== '' && opt.value != 'all-item') { opt.selected = true; }
else { opt.selected = false; }
}
}
}
option {
padding: 12px;
}
<select id="select" multiple onchange="handleChange(this)">
<option value="">Chose an option</option>
<option value="all-item">All</option>
<option value="saab">Saab</option>
<option value="opel">Opel</option>
<option value="audi">Audi</option>
</select>
EDIT
To unselect every other option :
function handleChange(element) {
if(element.value === 'all-item') {
const options = [...element.options];
for (let opt of options) {
if (opt.value === 'all-item') { opt.selected = true; }
else { opt.selected = false; }
}
}
}
option {
padding: 12px;
}
<select id="select" multiple onchange="handleChange(this)">
<option value="">Chose an option</option>
<option value="all-item">All</option>
<option value="saab">Saab</option>
<option value="opel">Opel</option>
<option value="audi">Audi</option>
</select>
You can simply check if all-item is selected with .is(':selected') when the user selects anything, and unselect anything else with .attr('selected',false) :
$('select').on('change',function(){
if($('option[value="all-item"]',this).is(':selected')){
$('option:not([value="all-item"])',this).attr('selected',false);
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select multiple>
<option value="all-item" selected>All</option>
<option value="saab">Saab</option>
<option value="opel">Opel</option>
<option value="audi">Audi</option>
</select>
I Have html select form like this:
<label>Num:</label>
<select id="id_num">
<option value='1'>1</option>
<option value='2'>2</option>
<option value='3'>3</option>
<option value=''>all</option>
</select>
<label>Choices:</label>
<select id="id_choices">
<option value='car'>car</option>
<option value='bike'>bike</option>
<option value='house'>house</option>
<option value='money'>money</option>
<option value='plane'>plane</option>
<option value='wife'>wife</option>
</select>
In my case I need to make it so that if I choose "1" at the first select form (# id_num), then the next select form (#id_choices) should only show "car" and "bike" options, and if I choose "2", #id_choices should only show "house" and "money", and also the rest.. But if i select "all", then every options on #id_choices should be shown.
How to solve that condition by using jQuery?
You can use jQuery's $.inArray() to filter your options, and make them display: none; depending upon the occurence of the item in the array,
Please have a look on the code below:
$(function() {
$('#id_num').on('change', function(e) {
if ($(this).val() == 1) {
var arr = ['car', 'bike'];
$('#id_choices option').each(function(i) {
if ($.inArray($(this).attr('value'), arr) == -1) {
$(this).css('display', 'none');
} else {
$(this).css('display', 'inline-block');
}
});
} else if ($(this).val() == 2) {
var arr = ['house', 'money'];
$('#id_choices option').each(function(i) {
if ($.inArray($(this).attr('value'), arr) == -1) {
$(this).css('display', 'none');
} else {
$(this).css('display', 'inline-block');
}
});
} else if ($(this).val() == 3) {
var arr = ['plane', 'wife'];
$('#id_choices option').each(function(i) {
if ($.inArray($(this).attr('value'), arr) == -1) {
$(this).css('display', 'none');
} else {
$(this).css('display', 'inline-block');
}
});
} else {
$('#id_choices option').each(function(i) {
$(this).css('display', 'inline-block');
});
}
})
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<label>Num:</label>
<select id="id_num">
<option disabled selected>Select</option>
<option value='1'>1</option>
<option value='2'>2</option>
<option value='3'>3</option>
<option value=''>all</option>
</select>
<label>Choices:</label>
<select id="id_choices">
<option value='car'>car</option>
<option value='bike'>bike</option>
<option value='house' >house</option>
<option value='money' >money</option>
<option value='plane' >plane</option>
<option value='wife' >wife</option>
</select>
Hope this helps!
You can run a function once when the page loads and then every time #id_num changes, such that all the visible #id_choices options are removed (using remove()), and then only the relevant options are re-added to #id_choices (using append()) to replace them.
Working Example:
$(document).ready(function(){
var car = '<option value="car">car</option>';
var bike = '<option value="bike">bike</option>';
var house = '<option value="house">house</option>';
var money = '<option value="money">money</option>';
var plane = '<option value="plane">plane</option>';
var wife = '<option value="wife">wife</option>';
function options1() {
$('#id_choices').append(car);
$('#id_choices').append(bike);
}
function options2() {
$('#id_choices').append(house);
$('#id_choices').append(money);
}
function options3() {
$('#id_choices').append(plane);
$('#id_choices').append(wife);
}
function displayOptions() {
$('#id_choices option').remove();
switch ($('#id_num option:selected' ).text()) {
case('1') : options1(); break;
case('2') : options2(); break;
case('3') : options3(); break;
case('all') : options1(); options2(); options3(); break;
}
}
$('#id_num').change(function(){displayOptions();});
displayOptions();
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<label>Num:</label>
<select id="id_num">
<option value='1'>1</option>
<option value='2'>2</option>
<option value='3'>3</option>
<option value=''>all</option>
</select>
<label>Choices:</label>
<select id="id_choices">
<option value='car'>car</option>
<option value='bike'>bike</option>
<option value='house'>house</option>
<option value='money'>money</option>
<option value='plane'>plane</option>
<option value='wife'>wife</option>
</select>
For the sake of completeness, here is the same approach as above, but this time in native javascript, so you can compare and contrast with the jQuery above:
var numbers = document.getElementById('id_num');
var choices = document.getElementById('id_choices');
function displayOptions() {
var optionSet1 = ['car', 'bike'];
var optionSet2 = ['house', 'money'];
var optionSet3 = ['plane', 'wife'];
var oldOptions = choices.getElementsByTagName('option');
var selected = numbers.options[numbers.selectedIndex].text;
while (oldOptions.length > 0) {
choices.removeChild(oldOptions[0]);
}
switch (selected) {
case('1') : var optionSet = optionSet1; break;
case('2') : optionSet = optionSet2; break;
case('3') : optionSet = optionSet3; break;
case('all') : optionSet = optionSet1.concat(optionSet2).concat(optionSet3); break;
}
for (var i = 0; i < optionSet.length; i++) {
var option = document.createElement('option');
option.setAttribute('value',optionSet[i]);
option.textContent = optionSet[i];
choices.appendChild(option);
}
}
numbers.addEventListener('change',displayOptions,false);
window.addEventListener('load',displayOptions,false);
<label>Num:</label>
<select id="id_num">
<option value='1'>1</option>
<option value='2'>2</option>
<option value='3'>3</option>
<option value=''>all</option>
</select>
<label>Choices:</label>
<select id="id_choices">
<option value='car'>car</option>
<option value='bike'>bike</option>
<option value='house'>house</option>
<option value='money'>money</option>
<option value='plane'>plane</option>
<option value='wife'>wife</option>
</select>
Add the attribute display with a value of none using .prop() instead of using disabled attribute (like in Saumya's answer) in case you want them completely invisible instead of just disabled/grayed-out
there may be a better way, however this does work.. you can also add hide/display classes to any other elements
$(document).ready(function () { $('#id_num').on('change', change) });
function change() {
$('#id_choices > option').hide();
$($(this).find(':selected').attr('clssval')).show();
}
.sel{display:none;}
.num1{display:block;}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<label>Num:</label>
<select id="id_num">
<option value='1' clssval=".num1">1</option>
<option value='2' clssval=".num2">2</option>
<option value='3' clssval=".num3">3</option>
<option value='' clssval=".num1,.num2,.num3">all</option>
</select>
<label>Choices:</label>
<select id="id_choices">
<option value='car' class="sel num1">car</option>
<option value='bike' class="sel num1">bike</option>
<option value='house' class="sel num2">house</option>
<option value='money' class="sel num2">money</option>
<option value='plane' class="sel num3">plane</option>
<option value='wife' class="sel num3">wife</option>
</select>
I'm searching and searching and can not find anything exactly what I need.
So I need javascript, that will select option from dropdown, but not by the option value number, but name.
I have:
<select class="aa" id="local" name="local">
<option value="0">Cała Polska</option>
<option value="1">Dolnośląskie</option>
<option value="100">• Bolesławiec</option>
<option value="101">• Dzierżoniów</option>
<option value="102">• Głogów</option>
<option value="103">• Góra</option>
<option value="104">• Jawor</option>
<option value="105">• Jelenia Góra</option>
So I need to select • Jawor by name, not by id - it's the most important. How do I make it work?
For you is it like;
var options = document.getElementsByClassName("aa")[0].options,
name ="Jawor";
for(i = 0; i < options.length; i++){
if(options[i].text.indexOf(name) > -1){
options[i].selected = true;
break;
}
}
<select class="aa" id="local" name="local">
<option value="0">Cała Polska</option>
<option value="1">Dolnośląskie</option>
<option value="100">• Bolesławiec</option>
<option value="101">• Dzierżoniów</option>
<option value="102">• Głogów</option>
<option value="103">• Góra</option>
<option value="104">• Jawor</option>
<option value="105">• Jelenia Góra</option>
</select>
U need to Use onChange Event Handler ... for example
<select onchange="showSelected()">
Then write your script ...
<script>
function showSelected(){
var s=document.getElementById('local'); //refers to that select with all options
var selectText=s.options[s.selectedIndex].text // takes the one which the user will select
alert(selectText) //Showing the text selected ...
}
</script>
Rest of your code is okay !
<select class="aa" id="local" name="local" onchange='showSelected'()>
<option value="0">Cała Polska</option>
<option value="1">Dolnośląskie</option>
<option value="100">• Bolesławiec</option>
<option value="101">• Dzierżoniów</option>
<option value="102">• Głogów</option>
<option value="103">• Góra</option>
<option value="104">• Jawor</option>
<option value="105">• Jelenia Góra</option>
</select>
Using jquery here. You can use the following function:
function selectFromDropdown(selector, text) {
$(selector).find('option').each(function() {
if ($(this).text() == text) {
$(selector).val($(this).val());
}
})
}
A demo:
function selectFromDropdown(selector, text) {
$(selector).find('option').each(function() {
if ($(this).text() == text) {
$(selector).val($(this).val());
return false;
}
})
}
//use the function
setTimeout(function() {
selectFromDropdown('#local', '• Dzierżoniów')
}, 1000)
setTimeout(function() {
selectFromDropdown('#local', '• Jawor')
}, 4000)
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select class="aa" id="local" name="local">
<option value="">Select</option>
<option value="0">Cała Polska</option>
<option value="1">Dolnośląskie</option>
<option value="100">• Bolesławiec</option>
<option value="101">• Dzierżoniów</option>
<option value="102">• Głogów</option>
<option value="103">• Góra</option>
<option value="104">• Jawor</option>
<option value="105">• Jelenia Góra</option>
</select>
for chrome console use this
document.getElementById("id").selectedIndex = '3'; or
document.getElementById('id').value = 'BA';
I have two drop downs dependent on each other.
When I'm selecting the FRUIT, I want to show only one Apple value from select2 and hide all the others but when I'm selecting Animal I want to show all the values
Please help me write the Javascript function.
Thanks.
<select name="select1" id="select1">
<option value="1">Fruit</option>
<option value="2">Animal</option>
<option value="3">Bird</option>
<option value="4">Car</option>
</select>
<select name="select2" id="select2">
<option value="1">Banana</option>
<option value="1">Apple</option>
<option value="1">Orange</option>
<option value="2">Wolf</option>
<option value="2">Fox</option>
<option value="2">Bear</option>
<option value="3">Eagle</option>
<option value="3">Hawk</option>
<option value="4">BWM<option>
</select>
//This is my java script function
function display(){
var access=document.getElementById("select1");
var list = document.getElementById("select2");
var selectlist=access[access.selectedIndex].value;
if(selectlist="APPLE"){
list.style.visiblity="hidden";
}else{
list.style.visiblity="block";
}
FIDDLE
//Add eventlistener for change-event
document.getElementById("selCategory").addEventListener("change", filter, false);
//Filter function which will filter on selected value from first select.
function filter()
{
var cat = document.getElementById("selCategory");
var opt = document.getElementById("selOptions");
var selectedValue = cat.options[cat.selectedIndex].value;
var firstEl = false;
var firstIndex = 0;
for(var i = 0; i < opt.options.length; i++)
{
if(opt.options[i].value !== selectedValue)
{
opt.options[i].style.display = "none";
}
else
{
opt.options[i].style.display = "block";
if(!firstEl)
{
firstIndex = i;
firstEl = true;
}
}
}
opt.value = opt.options[firstIndex].value;
}
//Execute on first load, second select is filtered from the start.
filter();
<select name="category" id="selCategory">
<option value="1">Fruit</option>
<option value="2">Animal</option>
<option value="3">Bird</option>
<option value="4">Car</option>
</select>
<select name="options" id="selOptions">
<option value="1">Banana</option>
<option value="1">Apple</option>
<option value="1">Orange</option>
<option value="2">Wolf</option>
<option value="2">Fox</option>
<option value="2">Bear</option>
<option value="3">Eagle</option>
<option value="3">Hawk</option>
<option value="4">BWM<option>
</select>
I have two <select> elements with different IDs.
When the user selects a value from the first select box, I want the second select box to only display connected values.
My code:
<select id="ExtraField_1" name="ExtraField_1">
<option value="1">test1</option>
<option value="2">test2</option>
<option value="3">test3</option>
<option value="4">test4</option>
<option value="5">test5</option>
<option value="6">test6</option>
<option value="7">test7</option>
<option value="8">test8</option>
<option value="9">test9</option>
<option value="10">test10</option>
<option value="11">test11</option>
<option value="12">test12</option>
</select>
<select id="ExtraField_2" name="ExtraField_2">
<option value="1">test1</option>
<option value="2">test2</option>
<option value="3">test3</option>
<option value="4">test4</option>
<option value="5">test5</option>
<option value="6">test6</option>
<option value="7">test7</option>
<option value="8">test8</option>
<option value="9">test9</option>
<option value="10">test10</option>
<option value="11">test11</option>
<option value="12">test12</option>
<option value="13">test13</option>
<option value="14">test14</option>
<option value="15">test15</option>
<option value="16">test16</option>
<option value="17">test17</option>
<option value="18">test18</option>
<option value="19">test19</option>
<option value="20">test20</option>
</select>
So when user selects "test1" from first select boxm he will see only "test2", "test3" and "test4" on the second select box; "test2" from first will show "test6", "test7" and "test8" in the second box.
How can I use JavaScript to resolve this problem?
If you can use jQuery then you can always just clear and append the options to the second select.
$('#ExtraField_1').change(function(){
$('#ExtraField_2').find('option').remove()
if($(this).val() == '1'){
$('#ExtraField_2').append($("<option </option>").attr('value','2').text('test2'));
$('#ExtraField_2').append($("<option></option>").attr('value','3').text('test3'));
$('#ExtraField_2').append($("<option></option>").attr('value','4').text('test4'));
}
if($(this).val() == '2'){
$('#ExtraField_2').append($("<option></option>").attr('value','5').text('test5'));
$('#ExtraField_2').append($("<option></option>").attr('value','6').text('test6'));
$('#ExtraField_2').append($("<option></option>").attr('value','7').text('test7'));
}
});
http://jsfiddle.net/8XVuv/2/
using only javascript is a bit more complicated but I would still take the same approach.
function createOption(otext,oValue){
var newOption = document.createElement('option');
newOption.text = otext;
newOption.value = oValue;
return newOption;
}
function clearSelect(theSelect){
for(var i = 0;i <= theSelect.options.length+1;i++)
{
theSelect.remove();
}
}
function onSelect(theSelect){
var nextSelect = document.getElementById('ExtraField_2');
clearSelect(nextSelect);
var selected = theSelect.options[theSelect.selectedIndex];
if(selected.value == 1){
nextSelect.add(createOption('test2','2'));
nextSelect.add(createOption('test3','3'));
nextSelect.add(createOption('test4','4'));
}
if(selected.value == 2){
nextSelect.add(createOption('test5','5'));
nextSelect.add(createOption('test6','6'));
nextSelect.add(createOption('test7','7'));
}
}
with html:
<select id="ExtraField_1" name="ExtraField_1" onchange="javascript: onSelect(this);" >
<option value="0">Select a test..</option>
<option value="1">test1</option>
<option value="2">test2</option>
<option value="3">test3</option>
<option value="4">test4</option>
<option value="5">test5</option>
<option value="6">test6</option>
<option value="7">test7</option>
<option value="8">test8</option>
<option value="9">test9</option>
<option value="10">test10</option>
<option value="11">test11</option>
<option value="12">test12</option>
</select>
<select id="ExtraField_2" name="ExtraField_2">
<option value="0">Select from the left</option>
</select>
as you can see it still does what you expect but you are not hiding options.
http://jsfiddle.net/upKzW/13/
$('#ExtraField_1').change(function() {
$('#ExtraField_2').val(this.value);
});
http://jsfiddle.net/judearasu/rF8G6/