I want to get the selected value from a group of radio buttons.
Here's my HTML:
<div id="rates">
<input type="radio" id="r1" name="rate" value="Fixed Rate"> Fixed Rate
<input type="radio" id="r2" name="rate" value="Variable Rate"> Variable Rate
<input type="radio" id="r3" name="rate" value="Multi Rate" checked="checked"> Multi Rate
</div>
Here's my js:
var rates = document.getElementById('rates').value;
var rate_value;
if(rates =='Fixed Rate'){
rate_value = document.getElementById('r1').value;
}else if(rates =='Variable Rate'){
rate_value = document.getElementById('r2').value;
}else if(rates =='Multi Rate'){
rate_value = document.getElementById('r3').value;
}
document.getElementById('results').innerHTML = rate_value;
I keep getting undefined.
This question is related to
javascript
html
radio-button
https://codepen.io/anon/pen/YQxbZJ
The HTML
<div id="rates">
<input type="radio" id="x1" name="rate" value="Fixed Rate"> Fixed Rate
<input type="radio" id="x2" name="rate" value="Variable Rate"
checked="checked"> Variable Rate
<input type="radio" id="x3" name="rate" value="Multi Rate" > Multi Rate
</div>
<button id="rdio"> Check Radio </button>
<div id="check">
</div>
The JS
var x ,y;
var x = document.getElementById("check");
function boom()
{
if (document.getElementById("x1").checked)
y = document.getElementById("x1").value;
else if(document.getElementById("x2").checked)
y = document.getElementById("x2").value;
else if (document.getElementById("x3").checked)
y = document.getElementById("x3").value;
else
y = "kuch nhi;"
x.innerHTML = y;
}
var z = document.getElementById('rdio');
z.addEventListener("click", boom);`
For you people living on the edge:
There is now something called a RadioNodeList and accessing it's value property will return the value of the currently checked input. This will remove the necessity of first filtering out the 'checked' input as we see in many of the posted answers.
Example Form
<form id="test">
<label><input type="radio" name="test" value="A"> A</label>
<label><input type="radio" name="test" value="B" checked> B</label>
<label><input type="radio" name="test" value="C"> C</label>
</form>
To retrieve the checked value, you could do something like this:
var form = document.getElementById("test");
alert(form.elements["test"].value);
The JSFiddle to prove it: http://jsfiddle.net/vjop5xtq/
Please note this was implemented in Firefox 33 (All other major browser seems to support it). Older browsers will require a polfyill for RadioNodeList
for this to properly function
directly calling a radio button many times gives you the value of the FIRST button, not the CHECKED button. instead of looping thru radio buttons to see which one is checked, i prefer to call an onclick
javascript function that sets a variable that can later be retrieved at will.
<input type="radio" onclick="handleClick(this)" name="reportContent" id="reportContent" value="/reportFleet.php" >
which calls:
var currentValue = 0;
function handleClick(myRadio) {
currentValue = myRadio.value;
document.getElementById("buttonSubmit").disabled = false;
}
additional advantage being that i can treat data and/or react to the checking of a button (in this case, enabling SUBMIT button).
In Javascript we can get the values by using Id's "getElementById()
" in the above code you posted has contain name not Id
so you to modify like this
if (document.getElementById('r1').checked) {
rate_value = document.getElementById('r1').value;
}
use this rate_value according to your code
Another (apparently older) option is to use the format: "document.nameOfTheForm.nameOfTheInput.value;" e.g. document.mainForm.rads.value;
document.mainForm.onclick = function(){_x000D_
var radVal = document.mainForm.rads.value;_x000D_
result.innerHTML = 'You selected: '+radVal;_x000D_
}
_x000D_
<form id="mainForm" name="mainForm">_x000D_
<input type="radio" name="rads" value="1" />_x000D_
<input type="radio" name="rads" value="2" />_x000D_
<input type="radio" name="rads" value="3" />_x000D_
<input type="radio" name="rads" value="4" />_x000D_
</form>_x000D_
<span id="result"></span>
_x000D_
You can refer to the element by its name within a form. Your original HTML does not contain a form element though.
Fiddle here (works in Chrome and Firefox): https://jsfiddle.net/Josh_Shields/23kg3tf4/1/
<form id="rates">
<input type="radio" name="rate" value="Fixed Rate"> Fixed
<input type="radio" name="rate" value="Variable Rate"> Variable
<input type="radio" name="rate" value="Multi Rate" checked> Multi
</form>
then...
var rate_value = rates.rate.value;
check value by ID:
var CheckedValues = ($("#r1").is(':checked')) ? 1 : 0;
Simply use: document.querySelector('input[rate][checked]').value
HTML CODE:
<input type="radio" name="rdoName" value="YES"/>
<input type="radio" name="rdoName" value="NO"/>
JQUERY CODE:
var value= $("input:radio[name=rdoName]:checked").val();
$("#btnSubmit").click(function(){_x000D_
var value=$("input:radio[name=rdoName]:checked").val();_x000D_
console.log(value);_x000D_
alert(value);_x000D_
})
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<input type="radio" name="rdoName" value="YES"/> YES_x000D_
<input type="radio" name="rdoName" value="NO"/> NO_x000D_
<br/>_x000D_
<input type="button"id="btnSubmit"value="Which one Selected"/>
_x000D_
You will get
value="YES" //if checked Radio Button with the value "YES"
value="NO" //if checked Radio Button with the value "NO"
In php it's very easy
html page
Male<input type="radio" name="radio" value="male"><br/>_x000D_
Female<input type="radio" name="radio" value="female"><br/>_x000D_
Others<input type="radio" name="radio" value="other"><br/>_x000D_
<input type="submit" value="submit">
_x000D_
Take value from form to php
$radio=$_POST['radio'];<br/>
use php if(isset($_POST['submit']))<br/>
{<br/>
echo "you selected".$radio."thank u";<br/>
}
This works in IE9 and above and all other browsers.
document.querySelector('input[name="rate"]:checked').value;
A year or so has passed since the question was asked, but I thought a substantial improvement of the answers was possible. I find this the easiest and most versatile script, because it checks whether a button has been checked, and if so, what its value is:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Check radio checked and its value</title>
</head>
<body>
<form name="theFormName">
<input type="radio" name="theRadioGroupName" value="10">
<input type="radio" name="theRadioGroupName" value="20">
<input type="radio" name="theRadioGroupName" value="30">
<input type="radio" name="theRadioGroupName" value="40">
<input type="button" value="Check" onclick="getRadioValue('theRadioGroupName')">
</form>
<script>
function getRadioValue(groupName) {
var radios = theFormName.elements[groupName];
window.rdValue; // declares the global variable 'rdValue'
for (var i=0; i<radios.length; i++) {
var someRadio = radios[i];
if (someRadio.checked) {
rdValue = someRadio.value;
break;
}
else rdValue = 'noRadioChecked';
}
if (rdValue == '10') {
alert('10'); // or: console.log('10')
}
else if (rdValue == 'noRadioChecked') {
alert('no radio checked');
}
}
</script>
</body>
</html>
You can also call the function within another function, like this:
function doSomething() {
getRadioValue('theRadioGroupName');
if (rdValue == '10') {
// do something
}
else if (rdValue == 'noRadioChecked') {
// do something else
}
}
Assuming your form element is referred to by myForm
variable below, and that your radio buttons share the name "my-radio-button-group-name", the following is pure JavaScript and standards compliant (although I have not checked it to be available everywhere):
myForm.elements.namedItem("my-radio-button-group-name").value
The above will yield the value of a checked (or selected, as it is also called) radio button element, if any, or null
otherwise. The crux of the solution is the namedItem
function which works with radio buttons specifically.
See HTMLFormElement.elements, HTMLFormControlsCollection.namedItem and especially RadioNodeList.value, as namedItem
usually returns a RadioNodeList
object.
I use MDN because it allows one to track standards compliance, at least to a large degree, and because it is easier to comprehend than many WhatWG and W3C publications.
You can also loop through the buttons with a forEach-loop on the elements
var elements = document.getElementsByName('radioButton');
var checkedButton;
console.log(elements);
elements.forEach(e => {
if (e.checked) {
//if radio button is checked, set sort style
checkedButton = e.value;
}
});
var rates=document.getElementsByName("rate");_x000D_
for (i = 0; i < rates.length; i++) {_x000D_
if (rates[i].checked) {_x000D_
console.log(rates[i].value);_x000D_
rate=rates[i].value;_x000D_
document.getElementById("rate").innerHTML = rate;_x000D_
alert(rate);_x000D_
_x000D_
}_x000D_
}
_x000D_
<div id="rates">_x000D_
<input type="radio" id="r1" name="rate" value="Fixed Rate"> Fixed Rate_x000D_
<input type="radio" id="r2" name="rate" value="Variable Rate"> Variable Rate_x000D_
<input type="radio" id="r3" name="rate" value="Multi Rate" checked="checked"> Multi Rate _x000D_
</div>_x000D_
</br>_x000D_
<div id='rate'>_x000D_
</div>
_x000D_
My take on this problem with pure javascript is to find the checked node, find its value and pop it out from the array.
var Anodes = document.getElementsByName('A'),
AValue = Array.from(Anodes)
.filter(node => node.checked)
.map(node => node.value)
.pop();
console.log(AValue);
Note that I'm using arrow functions. See this fiddle for a working example.
var rates = document.getElementById('rates').value;
cannot get values of a radio button like that instead use
rate_value = document.getElementById('r1').value;
You can get the value by using the checked
property.
var rates = document.getElementsByName('rate');
var rate_value;
for(var i = 0; i < rates.length; i++){
if(rates[i].checked){
rate_value = rates[i].value;
}
}
The one worked for me is given below from api.jquery.com.
HTML
<input type="radio" name="option" value="o1">option1</input>
<input type="radio" name="option" value="o2">option2</input>
JavaScript
var selectedOption = $("input:radio[name=option]:checked").val()
The variable selectedOption will contain the value of the selected radio button (i.e) o1 or o2
I used the jQuery.click function to get the desired output:
$('input[name=rate]').click(function(){
console.log('Hey you clicked this: ' + this.value);
if(this.value == 'Fixed Rate'){
rate_value = $('#r1').value;
} else if(this.value =='Variable Rate'){
rate_value = $('#r2').value;
} else if(this.value =='Multi Rate'){
rate_value = $('#r3').value;
}
$('#results').innerHTML = rate_value;
});
Hope it helps.
An improvement to the previous suggested functions:
function getRadioValue(groupName) {
var _result;
try {
var o_radio_group = document.getElementsByName(groupName);
for (var a = 0; a < o_radio_group.length; a++) {
if (o_radio_group[a].checked) {
_result = o_radio_group[a].value;
break;
}
}
} catch (e) { }
return _result;
}
[...rates.children].find(c=>c.checked).value
let v= [...rates.children].find(c=>c.checked).value
console.log(v);
_x000D_
<div id="rates">
<input type="radio" id="r1" name="rate" value="Fixed Rate"> Fixed Rate
<input type="radio" id="r2" name="rate" value="Variable Rate"> Variable Rate
<input type="radio" id="r3" name="rate" value="Multi Rate" checked="checked"> Multi Rate
</div>
_x000D_
Use document.querySelector('input[type = radio]:checked').value; to get value of selected checkbox , you can use other attributes to get value like name = gender etc. please go through below snippet definitely it will helpful to you,
Solution
document.mainForm.onclick = function(){_x000D_
var gender = document.querySelector('input[name = gender]:checked').value;_x000D_
result.innerHTML = 'You Gender: '+gender;_x000D_
}
_x000D_
<form id="mainForm" name="mainForm">_x000D_
<input type="radio" name="gender" value="Male" checked/>Male_x000D_
<input type="radio" name="gender" value="Female" />Female_x000D_
<input type="radio" name="gender" value="Others" />Others_x000D_
</form>_x000D_
<span id="result"></span>
_x000D_
Thank-You
If the buttons are in a form
var myform = new FormData(getformbywhatever);
myform.get("rate");
QuerySelector above is a better solution. However, this method is easy to understand, especially if you don't have a clue about CSS. Plus, input fields are quite likely to be in a form anyway.
Didn't check, there are other similar solutions, sorry for the repetition
If you are using the JQuery
, please use the bellow snippet for group of radio buttons.
var radioBtValue= $('input[type=radio][name=radiobt]:checked').val();
If you are using jQuery:
$('input[name="rate"]:checked').val();
You can use .find()
to select checked element:
var radio = Array.from(document.querySelectorAll('#rate input'))
var value = radio.length && radio.find(r => r.checked).value
Source: Stackoverflow.com