Issue: I have a dropdown with a list of years in it with nothing selected, the user selects "1976", I run a function. If the user clicks on the dropdown again and selects "1976" AGAIN, I want to run the function again.
$('select').on('change', function (e)
{
var optionSelected = $("option:selected", this);
var valueSelected = this.value;
alert(valueSelected);
});
Simple JS
---------
<html>
<head>
<script>
var prevIndex = "";
function onSelect()
{
var currIndex = document.getElementById("ddList").selectedIndex;
if( currIndex > 0 )
{
if( prevIndex != currIndex )
{
alert("Selected Index = " + currIndex);
prevIndex = currIndex;
}
else
{
prevIndex = "";
}
}
}
</script>
</head>
<body>
<select id="ddList" onClick="onSelect()">
<option value="0">Select Me</option>
<option value="1">List1</option>
<option value="2">List2</option>
<option value="3">List3</option>
</select>
</body>
</html>
This basic idea should work using jQuery using click event:
$('#yourselect').click(function() {
console.log("your function");
});
A simple if statement could prevent firing off the function when initially clicking the select element.
The closest functionality that you're seeking that I can think of is the following:
-HTML-
<select class="opt-evt">
<option value="" selected="selected"></option>
<option value="1976">1976</option>
</select>
-jQuery-
$(document).ready(function(){
$('.opt-evt').change(function(){
$(this).blur();
}).blur(function(){
console.log($(this).find('option:selected').val());
});
});
The caveat is that if the user selects '1976' again, the desired event only gets fired onBlur.
http://jsfiddle.net/4G9Jf/
mouseup event should do the trick:
$('select').mouseup(function(){
console.log("hue");
});
http://jsfiddle.net/5Fcgr/
note that this will be triggered twice when a new value is selected in the listbox. Once when opening the options, and once when selecting an option.
I have fixed as below,
<html>
<head>
<script>
function onSelect()
{
var dd = document.getElementById('ddList');
var txtTerms = document.getElementById('selValue');
var storeLstSlct = document.getElementById('checkIndx');
var slctdValue = '';
if(dd.selectedIndex == 0)
{
return false;
}else if(storeLstSlct.value == dd.options[dd.selectedIndex].value)
{
storeLstSlct.value = 'abcd';
return false;
}else
{
slctdValue = dd.options[dd.selectedIndex].value;
if(txtTerms.value != '')
txtTerms.value = txtTerms.value + ' , ' + slctdValue;
else
txtTerms.value = slctdValue;
storeLstSlct.value = slctdValue;
}
}
</script>
</head>
<body>
<select id='ddList' onclick='onSelect()'>
<option value='0'>Select Me</option>
<option value='One'>List1</option>
<option value='Two'>List2</option>
<option value='Three'>List3</option>
</select>
<input type='hidden' name='checkIndx' id='checkIndx' />
<input type='text' name='selValue' id='selValue' />
</body>
</html>
Related
I would like to make a jQuery check if a select field was changed. If it changes, set an alert message (has changed), if returned to default, set another alert message (default value).
$('select').on('change',function () {
var isDirty = false;
$('select').each(function () {
var $e = $(this);
if (!$e[0].options[$e[0].selectedIndex].defaultSelected) {
isDirty = true;
}
});
if(isDirty == true) {
alert("has changed");
} else {
alert("default value");
}
});
Please advise if this is the proper way.
You don't need inner each loop. Plus $(this)[0] can be optimised to just this:
$('select').on('change', function () {
var isDirty = !this.options[this.selectedIndex].defaultSelected;
if (isDirty) {
alert("has changed");
} else {
alert("default value");
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select name="" id="">
<option value="1">Label 1</option>
<option value="2" selected>Label 2</option>
<option value="3">Label 3</option>
<option value="4">Label 4</option>
</select>
I would do something like:
HTML:
<select data-default="one" id="the-select">
<option>one</option>
<option>two</option>
</select>
Javascript:
$('#the-select').change(function() {
var changed = $(this).val() != $(this).data('default');
alert(changed ? 'changed' : 'not changed');
});
Look, i'm getting crazy, i can't get the selected item inside a normal select dropdown list (The values of the list are created dynamiclly with js).
I have a list of items and that are the columns of a table and i want when i click on an item, the column is added to the table and if i click another time in that item the column is removed.
I've tried to use a change event with jquery and onchange event with js but if i select the item two times in a row the column is added but not removed because the value hasn't changed.
I've tried to give a onclick event to the options of the select but nothing happens when i click on one. I've tried to capturo the clicked option from the select with jquery with this code:
$("#selectTableLt").on("click", "option", function() {
let clickedOption = $(this);
console.log(clickedOption);
});
But nothing happens.
Can anyone help me with this, please? Thank you
Edit:
My html:
<select name="leftColumns" id="selectTableLt"></select>
I load the options with javascript but they look like:
<option value="opt1">Option 1</option>
It's very simple
Check this out
<!DOCTYPE html>
<html>
<head>
<title>Select from dropdown list</title>
</head>
<body>
<h1>Select from dropdown list</h1>
<p id="result">Result here</p>
<select id="country">
<option value="None">-- Select --</option>
<option value="ID1">America</option>
<option value="ID2" selected>India </option>
<option value="ID3">England</option>
</select>
<script>
function GetSelectedValue(){
var e = document.getElementById("country");
var result = e.options[e.selectedIndex].value;
document.getElementById("result").innerHTML = result;
}
function GetSelectedText(){
var e = document.getElementById("country");
var result = e.options[e.selectedIndex].text;
document.getElementById("result").innerHTML = result;
}
</script>
<br/>
<br/>
<button type="button" onclick="GetSelectedValue()">Get Selected Value</button>
<button type="button" onclick="GetSelectedText()">Get Selected Text</button>
</body>
</html>
here is a solution to handle the multiple click events and fetch the dropdown selected value
var oldValue = null;
$(document).on("click","#selectTableLt", function(){
s = $(this);
val = s.val();
if (oldValue == null) {
oldValue = val;
} else {
var newValue = s.val();
if (newValue != "") {
var finalVal = oldValue == s.val() ? oldValue : newValue;
console.log(finalVal)
}
$(document).unbind('click.valueCheck');
oldValue = null;
}
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select id="selectTableLt">
<option value="0">One</option>
<option value="1">Two</option>
</select>
You need to fetch the value using $.val() function
bind event to document in order to handle the dynamic event listener
$(document).on( eventName, selector, function(){} );
Using the Change Event:
$(document).on("change","#selectTableLt", function() {
let clickedOption = $(this).val();
console.log(clickedOption);
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select id="selectTableLt">
<option value="0">One</option>
<option value="1">Two</option>
</select>
Using the Click Event:
$(document).on("click","#selectTableLt", function() {
let clickedOption = $(this).val();
console.log(clickedOption);
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select id="selectTableLt">
<option value="0">One</option>
<option value="1">Two</option>
</select>
I am new to javascript and my code looks as below
In HTML:
<select name="dropdown" onChange="javascript: alertUser()" >
<option value="0" selected>Eat</option>
<option value="1">Work</option>
<option value="2">Sleep</option>
<option value="3" >Enjoy</option>
In javascript:
function alertUser()
{
confirm("Are you sure?");
}
Now, here is my problem.
When I select an element from dropdown, it will pop up confirmation dialogue "Are you Sure?". If I click Ok, the selection should change to selected value. If I cancel, the selected value should reset back to previously selected value in dropdown list.
Could anyone please help me to solve the problem.
Thank you
You can use this:
window.onload = function () {
var select = document.getElementsByName('dropdown')[0];
var lastselected = select.value;
select.onchange = function () {
var newselected = select.value;
if (confirm("Are you sure?")) {
lastselected = newselected
return true;
}
select.value = lastselected;
}
};
I added onload to it so it will run when page loads. I removed your inline js, more clean. So your html would be:
<select name="dropdown">
<option value="0" selected>Eat</option>
<option value="1">Work</option>
<option value="2">Sleep</option>
<option value="3">Enjoy</option>
</select>
DEMO HERE
Here's an alternative using the 'selectedIndex' method.
http://jsfiddle.net/thetenfold/UjYg2/
html
<select name="dropdown">
<option value="0" selected>Eat</option>
<option value="1">Work</option>
<option value="2">Sleep</option>
<option value="3">Enjoy</option>
</select>
JavaScript
function addEvent(elem, type, func) {
if (elem.addEventListener) {
elem.addEventListener(type, func, false);
} else if (elem.attachEvent) {
elem.attachEvent('on' + type, func);
}
}
addEvent(window, 'load', function () {
var select = document.getElementsByName('dropdown')[0],
last = select.selectedIndex;
addEvent(select, 'change', function () {
if( confirm('Are you sure?') ) {
last = select.selectedIndex;
} else {
select.selectedIndex = last;
}
});
});
There are two selection buttons which need client-side validation. The user must select one of them, and if user chooses one, the other one will be disabled automatically.
This my script:
<html>
<head>
<script type="text/javascript">
function Check() //this the funciton for diasbled
{
var x =document.getElementById("supexp1");
var y =document.getElementById("supexp2");
if(x.value != "")
{
document.form1.supexp2.disabled=true;
}
else if(y.value != "")
{
{
document.form1.supexp1.disabled=true;
}
}
}
</script>
</head>
<body>
<form method="POST" action="destination.php" id="form1">
<select name="SUPEXP" id="supexp1" data-native-menu="false" onChange="Check()">
<option >Ekspedisi Local1</option> //this selection 1
<option >Ekspedisi Local2</option> //this selection 1
<option >Ekspedisi Local3</option> //this selection 1
</select>
<select name="SUPEXP" id="supexp2" data-native-menu="false" onChange="Check2()">
<option >Ekspedisi Expor2</option> //this selection 2
<option >Ekspedisi Expor2</option> //this selection 2
<option >Ekspedisi Expor2</option> //this selection 2
</select>
</form>
</body>
</html>
I use the jquerymobile framework and selection connect to the database. That code (JavaScript) is not running.
I hope this is what you trying to do based on your description here is a jsfiddle
$(document).ready(function() {
$('#supexp1').change(function() {
$('#supexp2').attr("disabled" , "disabled")
});
$('#supexp2').change(function() {
$('#supexp1').attr("disabled" , "disabled")
});
});
Try this code
if(x.value != ""){
document.getElementById("supexp2").disabled=true;
} else if(y.value != "") {
document.getElementById("supexp1").disabled=true;
}
I guess to get the value of the selected item you need to use some thing like this
var e = document.getElementById("supexp1");
var x = e.options[e.selectedIndex].value;
instead of
var x =document.getElementById("supexp1");
do the same for Y
Using jquery, I need to set the class of a div using a select list.
For instance:
<select name="id[3]" id="id[3]">
<option value="11">- Please Select -</option>
<option value="16">Something</option>
<option value="15">Something else</option>
<option value="13">Etc...</option>
</select>
And this is the div that needs the class to be updated:
<div id="textpreview" class="textpreview"></div>
I have tried this code but I'm afraid my understanding of jquery is lacking:
$('#id\\[3\\]').change(function () {
var str = "";
$("select option:selected").each(function () {
str += $(this).text() + " ";
});
if (str==16){
$("#textpreview").attr('class', 'sixteen');
}
})
.trigger('change');
Any ideas?
I think you want to do what I have in this jsfiddle. The code goes like this:
$('#id\\[3\\]').change(function () {
if ($(this).val() === "16"){
$("#textpreview").addClass('sixteen');
} else
{
$("#textpreview").removeClass('sixteen');
}
}).trigger('change');
var $textpreview = $("#textpreview");
$('#id\\[3\\]').change(function() {
var val = $(this).val();
if (val == 16)
$textpreview.addClass('sixteen');
else
$textpreview.removeClass('sixteen');
});