I'm trying to add attributes to link taken from ahref html tag, please can anybody guide me that what am I doing wrong in this?
link will be taken from ahref tag and lang and currency from dropdowns and then the final link will be
"link+"index.php?lang="+lang+"¤cy="+currency;"
$(document).ready(function(){
var saveclass = null;
function onChangeHandler() {
const lang = document.querySelector('#lang').value;
const currency = document.querySelector('#currency').value;
var link=document.querySelector('#theButton')..getAttribute('href');
var strLink = link+"index.php?lang="+lang+"¤cy="+currency;
document.querySelector('#theButton').setAttribute('href', strLink);
}
onChangeHandler();
document.querySelector('#lang').addEventListener('change', onChangeHandler);
document.querySelector('#currency').addEventListener('change', onChangeHandler);
});
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script type="text/javascript" src="price_billing.js"></script>
</head>
<body>
<select name="" id="lang">
<option value="English">English</option>
<option value="French">French</option>
<option value="Spanish">Spanish</option>
</select>
<select name="" id="currency">
<option value="USD">USD</option>
<option value="EUR">EUR</option>
<option value="MXN">MXN</option>
</select>
Click
<select name="" id="lang">
<option value="English">English</option>
<option value="French">French</option>
<option value="Spanish">Spanish</option>
</select>
<select name="" id="currency">
<option value="USD">USD</option>
<option value="EUR">EUR</option>
<option value="MXN">MXN</option>
</select>
Click
</body>
</html>
I took a crack at this. Looks like you have an extra period [.] in front of getAttribute.
Working code:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
var saveclass = null;
function onChangeHandler() {
const lang = document.querySelector('#lang').value;
const currency = document.querySelector('#currency').value;
var link=document.querySelector('#theButton').getAttribute('href');
var strLink = link+"/index.php?lang="+lang+"¤cy="+currency;
document.querySelector('#theButton').setAttribute('href', strLink);
}
document.querySelector('#lang').addEventListener('change', onChangeHandler);
document.querySelector('#currency').addEventListener('change', onChangeHandler);
});
</script>
<select name="" id="lang">
<option value="English">English</option>
<option value="French">French</option>
<option value="Spanish">Spanish</option>
</select>
<select name="" id="currency">
<option value="USD">USD</option>
<option value="EUR">EUR</option>
<option value="MXN">MXN</option>
</select>
Click
I also took out the extra onChangeHandler(); because you already have change listeners running the function.
While this technically works, I don't recommend it. If a user keeps changing options, it keeps appending the new URL. Examples below:
https://alpha.com/index.php?lang=French¤cy=USD
https://alpha.com/index.php?lang=French¤cy=USD/index.php?lang=French¤cy=EUR
https://alpha.com/index.php?lang=French¤cy=USD/index.php?lang=French¤cy=EUR/index.php?lang=Spanish¤cy=EUR
https://alpha.com/index.php?lang=French¤cy=USD/index.php?lang=French¤cy=EUR/index.php?lang=Spanish¤cy=EUR/index.php?lang=Spanish¤cy=MXN
https://alpha.com/index.php?lang=French¤cy=USD/index.php?lang=French¤cy=EUR/index.php?lang=Spanish¤cy=EUR/index.php?lang=Spanish¤cy=MXN/index.php?lang=English¤cy=MXN
https://alpha.com/index.php?lang=French¤cy=USD/index.php?lang=French¤cy=EUR/index.php?lang=Spanish¤cy=EUR/index.php?lang=Spanish¤cy=MXN/index.php?lang=English¤cy=MXN/index.php?lang=English¤cy=USD
It would be better to change the URL after users are 100% sure of their options instead of on every single change.
So I have this drop down list
function copyThis(text) {
window.prompt("Copy this : ", text);
};
<!DOCTYPE html>
<html>
<body>
<select class="wrap" onchange="copyThis(this.value)">
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
<option value="opel">Opel</option>
<option value="audi">Audi</option>
</select>
</body>
</html>
Currently using the above it does not let me highlight or select the option that is chosen in the list. Is there a better way by double clicking and highlight the selected option so that i can Ctrl + C or Mouse right click and copy
How about a "copy" button:
function copyThis(text) {
window.prompt("Copy this : ", text);
};
$("#copy").click(function () {
window.prompt("copy this:", $("#cars option:selected").text());
});
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
</head>
<body>
<select id="cars" class="wrap">
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
<option value="opel">Opel</option>
<option value="audi">Audi</option>
</select>
<button id="copy">copy</button>
</body>
</html>
In my drop-down list, I have selection 1(A) and selection 2(B). If I select A from the drop-down list, I want to see a name, Janifer. If I select B, I want to see another name, David.
var mylist = document.getElementById("mylist");
if (mylist.value == "1") {
document.getElementById('myalllist').getElementsByTagName('option')[1].selected = 'selected';
}
if (mylist.value == "2") {
document.getElementById('myalllist').getElementsByTagName('option')[2].selected = 'selected';
}
HTML:
<select id="mylist" onchange="fndropoption()">
<option>Select</option>
<option>1</option>
<option>2</option>
</select>
<select id="myalllist" onchange="fndropoption()">
<option value="1">xxxxxxxx</option>
<option value="2">yyyyyyyy</option>
</select>
I couldn't get it to work with onChange attribute either. This works:
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
window.onload = function() {
var foo=document.getElementById("mylist");
foo.onchange=function() {
if(foo.options.selectedIndex != 0) {
document.getElementById("myalllist").options.selectedIndex = foo.options.selectedIndex-1;
}
}
}
</script>
</head>
<body>
<select id="mylist">
<option value="0" selected="selected">Select</option>
<option value="1">1</option>
<option value="2">2</option>
</select>
<select id="myalllist" onChange="">
<option value="1">xxxxxxxx</option>
<option value="2">yyyyyyyy</option>
</select>
</body>
</html>
try this - the onchange should be on the first dropdown list - to trigger the change for the second list. Seems to work, eg: selecting 3 in the first list causes the selection of 3 in the second list.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<select id="list1" onChange="changeList()">
<option value="0" selected="selected">Select</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
</select>
<select id="list2" >
<option value="0">0</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
</select>
<script>
function changeList()
{
var selectedOption=document.getElementById("list1").options.selectedIndex;
document.getElementById("list2").options.selectedIndex = selectedOption;
var selectedOption2=document.getElementById("list2").options.selectedIndex;
console.log(selectedOption2)
}
</script>
</body>
</html>
External system generates translations and replace literals with span text on the page. It works perfectly fine for the most of places but it doesn't work with options in select. They support only text. As the result my page has the issue like here SQL Fiddle sample.
<select class="ProductInfo" >
<option value=""></option>
<option value="0"><span class='translation'>Opt1</span></option>
<option value="1"><span class='translation'>Opt2</span></option>
</select>
I want some jquery/javascript function that would replace option content with just text and remove wrapper in above.
Expected result:
<select class="ProductInfo" >
<option value=""></option>
<option value="0">Opt1</option>
<option value="1">Opt2</option>
</select>
It is best to fix in the template itself, if that is not possible you can try something like
$('.ProductNoInfo option').text(function(i, t) {
return $(t).text()
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select class="ProductNoInfo">
<option value=""></option>
<option value="0"><span class='translation'>Opt1</span></option>
<option value="1"><span class='translation'>Opt2</span></option>
</select>
Try using decodeURICompoenent
$("select option").each(function() {
this.textContent = $(decodeURIComponent(this.textContent)).text()
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<select class="ProductInfo" >
<option value=""></option>
<option value="0"><span class='translation'>Opt1</span></option>
<option value="1"><span class='translation'>Opt2</span></option>
</select>
Try this,
$('.ProductNoInfo option').each(function(){
$(this).text($(this).find('span').text());
});
<html>
<head>
<script src="http://code.jquery.com/jquery-1.10.2.js"></script>
<script>
$(document).ready(function(){
$('.ProductInfo option').each(function () {
this.textContent = $(decodeURIComponent(this.textContent)).text()
});
});
</script>
</head>
<body>
<select class="ProductInfo" >
<option value=""></option>
<option value="0"><span class='translation'>Opt1</span></option>
<option value="1"><span class='translation'>Opt2</span></option>
</select>
</body>
</html>
How to use onClick() or onSelect() with option tag? Below is my code in which I tried to implement that, but it is not working as expected.
Note: where listCustomer domain object list getting in JSP page.
<td align="right">
<select name="singleSelect" ">
<c:forEach var="Customer" items="${listCustomer}" >
<option value="" onClick="javascript:onSelect(this);> <c:out value="${Customer}" /></option>
</c:forEach>
</select>
</td>
How do I modify it to detect that an option is selected?
Neither the onSelect() nor onClick() events are supported by the <option> tag. The former refers to selecting text (i.e. by clicking + dragging across a text field) so can only be used with the <text> and <textarea> tags. The onClick() event can be used with <select> tags - however, you probably are looking for functionality where it would be best to use the onChange() event, not onClick().
Furthermore, by the look of your <c:...> tags, you are also trying to use JSP syntax in a plain HTML document. That's just... incorrect.
In response to your comment to this answer - I can barely understand it. However, it sounds like what you want to do is get the value of the <option> tag that the user has just selected whenever they select one. In that case, you want to have something like:
<html>
<head>
<script type="text/javascript">
function changeFunc() {
var selectBox = document.getElementById("selectBox");
var selectedValue = selectBox.options[selectBox.selectedIndex].value;
alert(selectedValue);
}
</script>
</head>
<body>
<select id="selectBox" onchange="changeFunc();">
<option value="1">Option #1</option>
<option value="2">Option #2</option>
</select>
</body>
</html>
Even more simplified: You can pass the value attribute directly!
<html>
<head>
<script type="text/javascript">
function changeFunc(i) {
alert(i);
}
</script>
</head>
<body>
<select id="selectBox" onchange="changeFunc(value);">
<option value="1">Option #1</option>
<option value="2">Option #2</option>
</select>
</body>
</html>
The alert will either return 1 or 2.
The answer you gave above works but it is confusing because you have used two names twice and you have an unnecessary line of code. you are doing a process that is not necessary.
it's a good idea when debugging code to get pen and paper and draw little boxes to represent memory spaces (i.e variables being stored) and then to draw arrows to indicate when a variable goes into a little box and when it comes out, if it gets overwritten or is a copy made etc.
if you do this with the code below you will see that
var selectBox = document.getElementById("selectBox");
gets put in a box and stays there you don't do anything with it afterwards.
and
var selectBox = document.getElementById("selectBox");
is hard to debug and is confusing when you have a select id of selectBox for the options list . ---- which selectBox do you want to manipulate / query / etc is it the local var selectBox that will disappear or is it the selectBox id you have assigned to the select tag
your code works until you add to it or modify it then you can easily loose track and get all mixed up
<html>
<head>
<script type="text/javascript">
function changeFunc() {
var selectBox = document.getElementById("selectBox");
var selectedValue = selectBox.options[selectBox.selectedIndex].value;
alert(selectedValue);
}
</script>
</head>
<body>
<select id="selectBox" onchange="changeFunc();">
<option value="1">Option #1</option>
<option value="2">Option #2</option>
</select>
</body>
</html>
a leaner way that works also is:
<html>
<head>
<script type="text/javascript">
function changeFunc() {
var selectedValue = selectBox.options[selectBox.selectedIndex].value;
alert(selectedValue);
}
</script>
</head>
<body>
<select id="selectBox" onchange="changeFunc();">
<option value="1">Option #1</option>
<option value="2">Option #2</option>
</select>
</body>
</html>
and it's a good idea to use descriptive names that match the program and task you are working on am currently writing a similar program to accept and process postcodes using your code and modifying it with descriptive names the object is to make computer language as close to natural language as possible.
<script type="text/javascript">
function Mapit(){
var actualPostcode=getPostcodes.options[getPostcodes.selectedIndex].value;
alert(actualPostcode);
// alert is for debugging only next we go on to process and do something
// in this developing program it will placing markers on a map
}
</script>
<select id="getPostcodes" onchange="Mapit();">
<option>London North Inner</option>
<option>N1</option>
<option>London North Outer</option>
<option>N2</option>
<option>N3</option>
<option>N4</option>
// a lot more options follow
// with text in options to divide into areas and nothing will happen
// if visitor clicks on the text function Mapit() will ignore
// all clicks on the divider text inserted into option boxes
</select>
in this example de select tag is named as: aula_clase_cb
<select class="form-control" id="aula_clase_cb" >
</select>
document.getElementById("aula_clase_cb").onchange = function(e){
id = document.getElementById('aula_clase_cb').value;
alert("id: "+id);
};
<div class="form-group">
<script type="text/javascript">
function activa(){
if(v==0)
document.formulario.vr_negativo.disabled = true;
else if(v==1)
document.formulario.vr_negativo.disabled = true;
else if(v==2)
document.formulario.vr_negativo.disabled = true;
else if(v==3)
document.formulario.vr_negativo.disabled = true;
else if(v==4)
document.formulario.vr_negativo.disabled = true;
else if(v==5)
document.formulario.vr_negativo.disabled = true;
else if(v==6)
document.formulario.vr_negativo.disabled = false;}
</script>
<label>¿Qué tipo de vehículo está buscando?</label>
<form name="formulario" id="formulario">
<select name="lista" id="lista" onclick="activa(this.value)">
<option value="0">Vehiculo para la familia</option>
<option value="1">Vehiculo para el trabajo</option>
<option value="2">Camioneta Familiar</option>
<option value="3">Camioneta de Carga</option>
<option value="4">Vehiculo servicio Publico</option>
<option value="5">Vehiculo servicio Privado</option>
<option value="6">Otro</option>
</select>
<br />
<input type="text" id="form vr_negativo" class="form-control input-xlarge" name="vr_negativo"/>
</form>
</div>
You can change selection in the function
window.onload = function () {
var selectBox = document.getElementById("selectBox");
selectBox.addEventListener('change', changeFunc);
function changeFunc() {
alert(this.value);
}
}
<!DOCTYPE html>
<html>
<head>
<title>Selection</title>
</head>
<body>
<select id="selectBox" onChange="changeFunc();">
<option> select</option>
<option value="1">Option #1</option>
<option value="2">Option #2</option>
</select>
</body>
</html>
<html>
<head>
<title>Cars</title>
</head>
<body >
<h1>Cars</h1>
<p>Name </p>
<select id="selectBox" onchange="myFunction(value);">
<option value="volvo" >Volvo</option>
<option value="saab" >Saab</option>
<option value="mercedes">Mercedes</option>
</select>
<p id="result"> Price : </p>
<script>
function myFunction($value)
{
if($value=="volvo")
{document.getElementById("result").innerHTML = "30L";}
else if($value=="saab")
{document.getElementById("result").innerHTML = "40L";}
else if($value=="mercedes")
{document.getElementById("result").innerHTML = "50L";}
}
</script>
</body>
</html>```
Other option, for similar example but with anidated selects, think that you have two select, the name of the first is "ea_pub_dest" and the name of the second is "ea_pub_dest_2", ok, now take the event click of the first and display the second.
<script>
function test()
{
value = document.getElementById("ea_pub_dest").value;
if ( valor == "value_1" )
document.getElementById("ea_pub_dest_nivel").style.display = "block";
}
</script>
Change onClick() from with onChange() in the . You can send the option value to a javascript function.
<select id="selector" onChange="doSomething(document.getElementById(this).options[document.getElementById(this).selectedIndex].value);">
<option value="option1"> Option1 </option>
<option value="option2"> Option2 </option>
<option value="optionN"> OptionN </option>
</select>
If you need to change the value of another field, you can use this:
<input type="hidden" id="mainvalue" name="mainvalue" value="0">
<select onChange="document.getElementById('mainvalue').value = this.value;">
<option value="0">option 1</option>
<option value="1">option 2</option>
</select>
example dom onchange usage:
<select name="app_id" onchange="onAppSelection(this);">
<option name="1" value="1">space.ecoins.beta.v3</option>
<option name="2" value="2">fun.rotator.beta.v1</option>
<option name="3" value="3">fun.impactor.beta.v1</option>
<option name="4" value="4">fun.colorotator.beta.v1</option>
<option name="5" value="5">fun.rotator.v1</option>
<option name="6" value="6">fun.impactor.v1</option>
<option name="7" value="7">fun.colorotator.v1</option>
<option name="8" value="8">fun.deluxetor.v1</option>
<option name="9" value="9">fun.winterotator.v1</option>
<option name="10" value="10">fun.eastertor.v1</option>
<option name="11" value="11">info.locatizator.v3</option>
<option name="12" value="12">market.apks.ecoins.v2</option>
<option name="13" value="13">fun.ecoins.v1b</option>
<option name="14" value="14">place.sin.v2b</option>
<option name="15" value="15">cool.poczta.v1b</option>
<option name="16" value="16" id="app_id" selected="">systems.ecoins.launch.v1b</option>
<option name="17" value="17">fun.eastertor.v2</option>
<option name="18" value="18">space.ecoins.v4b</option>
<option name="19" value="19">services.devcode.v1b</option>
<option name="20" value="20">space.bonoloto.v1b</option>
<option name="21" value="21">software.devcode.vpnfree.uk.v1</option>
<option name="22" value="22">software.devcode.smsfree.v1b</option>
<option name="23" value="23">services.devcode.smsfree.v1b</option>
<option name="24" value="24">services.devcode.smsfree.v1</option>
<option name="25" value="25">software.devcode.smsfree.v1</option>
<option name="26" value="26">software.devcode.vpnfree.v1b</option>
<option name="27" value="27">software.devcode.vpnfree.v1</option>
<option name="28" value="28">software.devcode.locatizator.v1</option>
<option name="29" value="29">software.devcode.netinfo.v1b</option>
<option name="-1" value="-1">none</option>
</select>
<script type="text/javascript">
function onAppSelection(selectBox) {
// clear selection
for(var i=0;i<=selectBox.length;i++) {
var selectedNode = selectBox.options[i];
if(selectedNode!=null) {
selectedNode.removeAttribute("id");
selectedNode.removeAttribute("selected");
}
}
// assign id and selected
var selectedNode = selectBox.options[selectBox.selectedIndex];
if(selectedNode!=null) {
selectedNode.setAttribute("id","app_id");
selectedNode.setAttribute("selected","");
}
}
</script>
In my case:
<html>
<head>
<script type="text/javascript">
function changeFunction(val) {
//Show option value
console.log(val.value);
}
</script>
</head>
<body>
<select id="selectBox" onchange="changeFunction(this)">
<option value="1">Option #1</option>
<option value="2">Option #2</option>
</select>
</body>
</html>
focus clears value, so select any value is a change and fires myFunc(this) and blur defocus for reselect
<html>
<head>
<script type="text/javascript">
function myFunc(el) {
//Show option value
console.log(el.value);
}
</script>
</head>
<body>
<select id="selectBox" onchange="myFunc(this);this.blur();" onfocus="this.selectedIndex = -1;">
<option value="1">Option #1</option>
<option value="2">Option #2</option>
</select>
</body>
</html>