i have 3 elemests of radio group.
How can i get the value of the radio element?
can i have same id for all 3 elements?
??<input type="radio" id="ans" name="ans" value="1" />
<input type="radio" id="ans" name="ans" value="0" />
how will i get the value of ans
Id's must be unique, you should have the radio buttons with the same name, and get its value iterating through them:
<input type="radio" name="ans" value="1" />
<input type="radio" name="ans" value="0" />
var elements = document.getElementsByName('ans'), //or document.forms['name'].ans
i, el;
for (i = 0; i < elements.length;i++) {
el = elements[i];
if (el.checked) {
alert(el.value);
break;
}
}
getElementsByName('ans'), or document.forms['name'].ans returns an array object, containing the elements with the name ans.
I do not recommend having the same id for all 3 elements. You do have to have the same name for each button in order for it to be part of the group. If you have the form its in, you can do this
var myForm = document.getElementById('myForm');
var radioVal = myForm.ans.value;
That will give you your value.
Related
I'm trying to change the URL when I select radio button.
I have found an answer that works for 'select' form elements, but if I apply it to my radio buttons it lists out all the options instead of the one that is selected
My JS
$('.unitfiltercontrol').change(function(){
var params =[];
$('.unitfiltercontrol').each(function(){
$this=$(this);
if(!$this.val()=='') params.push($this.data('param')+'='+encodeURIComponent( $this.val() ));
});
$('#urlDisplay').text(window.location.href+('?'+params.join('&'))); //print to div for testing
});
My HTML:
<form>
<input id="radio1" type="radio" value="1" name="foo" data-param="foo" class="unitfiltercontrol">
<input id="radio2" type="radio" value="2" name="foo" data-param="foo" class="unitfiltercontrol">
<input id="radio3" type="radio" value="1" name="bar" data-param="bar" class="unitfiltercontrol">
<input id="radio4" type="radio" value="2" name="bar" data-param="bar" class="unitfiltercontrol">
</form>
<div id="urlDisplay"></div>
So if I select radio1, instead of the URL being displayed as:
/?foo=1
I get:
/?foo=1&foo=2&bar=1&bar=2
How would I modify this to work with radio buttons?
Hi friend you can use if condition when pushing parameters to like below
$('.unitfiltercontrol').change(function(){
var params =[];
$('.unitfiltercontrol').each(function(){
$this=$(this);
if ($(this).prop("checked")) { //get the values of only checked radio buttons
if(!$this.val()=='') params.push($this.data('param')+'='+encodeURIComponent( $this.val() ));
}
});
$('#urlDisplay').text(window.location.href+('?'+params.join('&'))); //print to div for testing
});
Radio button in your case make single selection , so no need to loop each radio , just get in the change the value and data for current clicked , then create object using data-param as key , after that loop thorough keys and create and array of key + values as below ; snippet :
let values = {};
$('.unitfiltercontrol').change(function(e){
let data = $(this).data('param');
let value = this.value;
values[data] = value;
let params = [];
let keys = Object.keys(values);
for(inc = 0; inc < keys.length ; inc ++) {
let key = keys[inc];
params.push(key+'='+encodeURIComponent(values[key]))
}
$('#urlDisplay').text(window.location.href+('?'+params.join('&')));
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
My HTML:
<form>
<input id="radio1" type="radio" value="1" name="foo" data-param="foo" class="unitfiltercontrol">
<input id="radio2" type="radio" value="2" name="foo" data-param="foo" class="unitfiltercontrol">
<input id="radio3" type="radio" value="1" name="bar" data-param="bar" class="unitfiltercontrol">
<input id="radio4" type="radio" value="2" name="bar" data-param="bar" class="unitfiltercontrol">
</form>
<div id="urlDisplay"></div>
<div id="urlDisplay">
</div>
I'm having trouble display value of radio button
when I click on the radio buttons,
I want to see all the values of buttons in the box.
its shows values on the console but in the box, it only shows 'carrot' which is one of ingredients in the array.
function mixRecipeBox(){
var mixIngredients = document.getElementsByTagName('input');
for(i=0; i<mixIngredients.length; i++){
if(mixIngredients[i].checked)
console.log(mixIngredients[i].value);
document.getElementById('mixbox').innerHTML = mixIngredients[i].value;
}
}
You are replacing all data of mixbox in each loop. use this to
append data.
You forgot {} for if block
Empty mixbox on start of function.
use checkbox instead of radio so user can discard choice.
function mixRecipeBox(){
document.getElementById('mixbox').innerHTML=""
var currentHTML;
var mixIngredients = document.getElementsByTagName('input');
for(i=0; i<mixIngredients.length; i++){
if(mixIngredients[i].checked)
{
console.log(mixIngredients[i].value);
currentHTML= document.getElementById('mixbox').innerHTML;
document.getElementById('mixbox').innerHTML = currentHTML+mixIngredients[i].value;
}
}
}
<input type="checkbox" value="1" onchange="mixRecipeBox()">
<input type="checkbox" value="2" onchange="mixRecipeBox()">
<input type="checkbox" value="3" onchange="mixRecipeBox()">
<input type="checkbox" value="4" onchange="mixRecipeBox()">
<div id="mixbox"></div>
Loop over each radio element and assign a click event handler.
The radio button click handler first clears the mixbox, then loops over each radio element and puts checked radio button values in the mixbox.
<div id="rads">
<input type="radio" value="one" />1
<input type="radio" value="two" />2
<input type="radio" value="three" />3
</div>
<div id="mixbox"></div>
<script>
var rads = document.querySelectorAll('#rads input[type=radio]');
var mixbox = document.getElementById('mixbox');
Array.prototype.forEach.call(rads, function (elem) {
elem.addEventListener('click', function (evt) {
mixbox.innerHTML = '';
Array.prototype.forEach.call(rads, function (ele) {
if ( ele.checked ) { mixbox.innerHTML += ele.value + '<br>'; }
})
})
})
</script>
JSFiddle
I have multiple radio groups like so:
<input type="radio" name="sex" value="male">
<input type="radio" name="sex" value="female">
<input type="radio" name="length" value="tall">
<input type="radio" name="length" value="short">
And so on..
My goal is to find out all the sets of radio groups that are on the page. So in this case, it would return sex, length
So far I am able to get all of the input's, but I am not sure where to go from here.
var radio_groups = [];
$("input[type=radio]").each(function(e){
//get the name
var name = this.attr('name');
});
If all you want is an object that has the names as keys can do:
var radios ={};
$("input[type=radio]").each(function(e){
radios[this.name] = true;
});
console.dir(radios);
/* if want to convert to array */
var radioArray= Object.keys(radios);
DEMO
Use indexOf() to check whether you've already seen the name:
var radio_groups = [];
$("input[type=radio]").each(function(e) {
var name = $(this).attr('name');
if (radio_groups.indexOf(name) < 0)
radio_groups.push(name);
});
console.log(radio_groups);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<input type="radio" name="sex" value="male">
<input type="radio" name="sex" value="female">
<input type="radio" name="length" value="tall">
<input type="radio" name="length" value="short">
If you want to get the value of the checkboxes you might want to consider wrapping the radio's in a form tag. like so:
<form id="f1">
<input type="radio" name="sex" value="male">
<input type="radio" name="sex" value="female">
<input type="radio" name="length" value="tall">
<input type="radio" name="length" value="short">
</form>
Then you can get the value for each like so:
var lenghtVal = document.forms[0].length.value;
var sexVal = document.forms[0].sex.value;
Replace the index of the forms array according to your situation.
Your selector selects all input elements withe name attribute starting with group, it doesn't filter out unique names
If you want to print only different group names then
var group = {};
$('input[name=*][type="radio"]').each(function (index) {
var name = this.name;
var elemValue = $(this).val();
if (!group[name]) {
group[name] = true;
console.log(elemValue);
}
});
Try this:
http://jsfiddle.net/76bhs444/1/
hit f12 and view it in the console. This should be what your looking for.
// get all radio names
var radio_groups = $("input[type=radio]").map(function(e){
return $(this).attr('name');
}).get();
console.log(radio_groups);
// filter duplicates
radio_groups = $.grep(radio_groups, function(value, index) {
return $.inArray(value, radio_groups) === index;
});
console.log(radio_groups);
i am fetching roll numbers here which have two radio buttons in 'php'.there will be multiple number of roll numbers so i want to check all the radio buttons whose value are 'yes' at once using a particular radio button or check box.although i didn't write that button in this code as i don't know what to write.please give me a solution using java script.
while($row=mysqli_fetch_assoc($result))
{
echo"<tr><td>{$row['roll']}</td>
</td><td></td><td></td><td></td><td>
<td><input type='radio' name='present[$i]' value='Yes'>YES</td>
</td><td></td><td></td><td>
<td><input type='radio' name='present[$i]' value='No'>NO</td></tr>";
$i++;
}
This type of interaction should be using a Javascript implementation since it is a client-side operation.
HTML:
<form>
<input type="radio" name="radio1" value="yes"/>Yes
<input type="radio" name="radio1" value="no"/>No
<br />
<input type="radio" name="radio2" value="yes"/>Yes
<input type="radio" name="radio2" value="no"/>No
<br />
<input type="radio" name="radio3" value="yes"/>Yes
<input type="radio" name="radio3" value="no"/>No
<br />
<input type="button" value="Select All" onclick="selectAll('radio',true);"/>
<input type="button" value="Deselect All" onclick="selectAll('radio',false);"/>
</form>
Javascript:
function selectAll( prefix, set ) {
var form = document.forms[0], //Get the appropriate form
i = 0,
radio;
while( radio = form[prefix + ++i] ) //Loop through all named radio# elements
for( var j = 0; j < radio.length; j++ ) //Loop through each set of named radio buttons
if( radio[j].value == (set ? "yes" : "no") ) //Selector based on value of set
radio[j].checked = true; //Check that radio button!
}
JSFiddle
Im trying to create a javascript block inside of a webpage im working on. I havent done javascript since highschool and it doesnt seem to want to come back to me :(
In this block of code i want to have 4 sets of radio buttons, each time a selection is picked,
a price will be inputed to a variable for each radio group. i.e
var firstPrice = $25
var secondPrice = $56
var thirdPrice = $80
var fourthPrice = $90
then after each radio group has one selection there will be a function attached to the submit button that adds up each price to display the final amount inside of a hidden field
var totalPrice = (firstPrice + secondPrice + thirdPrice + fourthPrice)
My question is, how do i attach a number value to a radio button within a group, same name but id is different in each group. Then do i just create a function that adds all the price groups up and then set the submit button to onClick = totalPrice();
Here is an example of one set of radio buttons:
<label>
<input type="radio" name="model" value="radio" id="item_0" />
item 1</label>
<br />
<label>
<input type="radio" name="model" value="radio" id="item_1" />
item2</label>
<br />
<label>
<input type="radio" name="model" value="radio" id="item_2" />
item3</label>
<br />
<label>
<input type="radio" name="model" value="radio" id="item_3" />
Item4</label>
<br />
<label>
<input type="radio" name="model" value="radio" id="item_4" />
item5</label>
</form>
then my script looks something like:
function finalPrice90{
var selectionFirst = document.modelGroup.value;
var selectionSecond = document.secondGroup.value;
var selectionThird = document.thirdGroup.value;
var selectionFourth = document.fourthGroup.Value;
var totalPrice = (selectionFirst + selectionSecond + selectionThird + selectionFourth);
}
Try this fiddle
http://jsfiddle.net/tariqulazam/ZLQXB/
Set the value attribute of your radio inputs to the price each radio button should represent.
When it's time to calculate, simply loop through each group and get the value attribute if the checked radio.
Because the value attribute is a string representation of a number, you'll want to convert it back to a number before doing any math (but that's a simple parseInt or parseFloat).
Here's a working fiddle using pure JavaScript: http://jsfiddle.net/XxZwm/
A library like jQuery or Prototype (or MooTools, script.aculo.us, etc) may make this easier in the long run, depending on how much DOM manipulation code you don't want to re-invent a wheel for.
Your requirements seem pretty simple, here's an example that should answer most questions. There is a single click listener on the form so whenever there is a click on a form control, the price will be updated.
<script type="text/javascript">
//function updatePrice(el) {
function updatePrice(event) {
var el = event.target || event.srcElement;
var form = el.form;
if (!form) return;
var control, controls = form.elements;
var totalPrice = 0;
var radios;
for (var i=0, iLen=controls.length; i<iLen; i++) {
control = controls[i];
if ((control.type == 'radio' || control.type == 'checkbox') && control.checked) {
totalPrice += Number(control.value);
}
// Deal with other types of controls if necessary
}
form.totalPrice.value = '$' + totalPrice;
}
</script>
<form>
<fieldset><legend>Model 1</legend>
<input type="radio" name="model1" value="25">$25<br>
<input type="radio" name="model1" value="35">$35<br>
<input type="radio" name="model1" value="45">$45<br>
<input type="radio" name="model1" value="55">$55<br>
</fieldset>
<fieldset><legend>Model 2</legend>
<input type="radio" name="model2" value="1">$1<br>
<input type="radio" name="model2" value="2">$2<br>
<input type="radio" name="model2" value="3">$3<br>
<input type="radio" name="model2" value="4">$4<br>
<fieldset><legend>Include shipping?</legend>
<span>$5</span><input type="checkbox" value="5" name="shipping"><br>
</fieldset>
<input name="totalPrice" readonly><br>
<input type="reset" value="Clear form">
</form>
You could put a single listener on the form for click events and update the price automatically, in that case you can get rid of the update button.