Make checkboxes required - javascript

I already looked to similar questions but I still can't figure out how to fix it. On my webpage, I have some radio checkboxes which I would like to be required before going to the next question.
I have the following partial code:
<p>
Select the option that fits most to you<br><br>
<label>
<input type="radio" name="typesport" value="teamsport" >
I prefer a teamsport</label><br>
<label>
<input type="radio" name="typesport" value="individual">
I prefer an individual sport</label><br>
</p>
Next question
Can someone help me with getting a javascript code, that actually works for all radio-boxes, where you could only go to the next question when 1 radio-box is selected?
Cheers,
Max
Edit: What I've tried so far is the following:
I added "required" to the label, so it looked like this:
<label><input type="radio" name="typesport" value="teamsport" required> I prefer a teamsport</label><br>
I also added the ID to the button:
Next question
Furthermore, I used this JS script:
$(document).ready(function () {
$('#checkBtn').click(function() {
checked = $("input[type=radio]:checked").length;
if(!checked) {
alert("You must check at least one radio.");
return false;
}
});
});
However, this works fine for only one question. When I add this to all the other questions, I still can go to the following question when I click on the button Next question, and that is not what I want.

Radio boxes are fairly simple in nature in that you should always have at least one option in a radio-group checked by default. Preferably a N/A or 'Please Select' option.
In which case you would want to validate against the 'Please Select' option instead:
//when user clicks <a> element
$(".next-button").click(function() {
//group on radio button name and test if checked
if ($("input[name='typesport']:checked").val() == 'select') {
alert('Nothing is checked!');
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p>
Select the option that fits most to you<br><br>
<label><input type="radio" name="typesport" value="select" checked="true" > Please Select </label><br>
<label><input type="radio" name="typesport" value="teamsport" > I prefer a teamsport</label><br>
<label><input type="radio" name="typesport" value="individual"> I prefer an individual sport</label><br>
</p>
Next question
However
If you really want to validate that an option has been checked:
This should work:
//when user clicks <a> element
$(".next-button").click(function()
{
//group on radio button name and test if checked
if (!$("input[name='typesport']:checked").val()) {
alert('Nothing is checked!');
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p>
Select the option that fits most to you<br><br>
<label><input type="radio" name="typesport" value="teamsport" > I prefer a teamsport</label><br>
<label><input type="radio" name="typesport" value="individual"> I prefer an individual sport</label><br>
</p>
Next question

HTML5 supports the required attribute for radio buttons. I did some searching and HTML5: How to use the "required" attribute with a "radio" input field has more detailed information about this attribute.

You can set a radio button checked by default by using the checked attribute.
To check if it's checked or not, use this code :
if ($('input[name=typesport]').attr('value') != undefined) {
//execute code when it is checked
} else {
//execute code when it's not checked
}

Related

JQuery: Getting a series of checkboxes to validate

I'm trying to get a group of checkboxes as part of an overall form I created in the admin area of WordPress to validate. Basically, custom fields. Here's what the code looks like:
<div><label><input type="checkbox" value="0-2" name="_ecp_custom_5[]" /> 0-2</label></div>
<div><label><input type="checkbox" value="3-5" name="_ecp_custom_5[]" /> 3-5</label></div>
<div><label><input type="checkbox" value="6-8" name="_ecp_custom_5[]" /> 6-8</label></div>
and so on.....
So I have this in my JavaScript:
jQuery(document).ready(function($) {
$('[name="_ecp_custom_3"]').attr("required", true);
$('[name="_ecp_custom_5[]"]').prop("checked", true);
});
First line for a text field, works great. But the checked one underneath doesn't work at all. If I submit the form without checking a box, the form still publishes and when it comes back, all the fields are now checked even though I didn't check any of them.
Puzzled what to do in regards to that since there's going to be several rules in this validation function.
If you are using html:
An html element name and id cannot include special characters, such as [ ], and must begin with a letter (A-Z), (a-z).
Aside from that, your jQuery references an element with the name=_ecp_custom_5 and not name=_ecp_custom_5[]. Simply remove the [] in your names and your code will work.
Update
The $('[name=foo]').prop("checked", true) sets all checkboxes with name=foo to checked. I'm a bit confused about what you are asking at this point, since it seems like you are confused about why your form is submitting all checkbox inputs as checked?
You want to require that at least one checkbox is checked, right?
You can iterate all inputs with the name attribute value of "_ecp_custom_5[]" by using jQuery.each(). With that, you can create any flag variable that will be used on any condition.
Please refer to the snippet below if you can't visualize what I am trying to say.
If you want to require that at least one checkbox is checked, you can use this example as your basis
$(function() {
$('#btnValidate').click(function() {
var flag = false;
$.each($('[name="_ecp_custom_5[]"]'), function(index, value) {
var checkboxStatus = $(this).prop('checked');
if (checkboxStatus == true) {
flag = checkboxStatus;
}
});
if (flag == false) {
alert('No checkbox has been checked')
} else {
alert('Success!')
}
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div>
<label>
<input type="checkbox" value="0-2" name="_ecp_custom_5[]" /> 0-2
</label>
</div>
<div>
<label>
<input type="checkbox" value="3-5" name="_ecp_custom_5[]" /> 3-5
</label>
</div>
<div>
<label>
<input type="checkbox" value="6-8" name="_ecp_custom_5[]" /> 6-8
</label>
</div>
<button id="btnValidate" style="margin-top: 20px;">Validate</button>
How I did it?
I iterated all inputs with the name attribute value of "_ecp_custom_5[]".
Then I created a boolean variable named "flag" (default value is false) that is being changed to true only if a checkbox from the iteration has the prop('checked') value of true. If no checkbox has been checked, then the "flag" variable's value will remain false which will then be checked by my condition.

If I select first checkbox then disable all remaining checkboxes

I have four check boxes inside a separate label.
If I select first check box then all remaining check boxes will be disable. If I click first again, all check boxes will be enabled.
If I select any other check box, the others are still enabled: I can select more than one. See image here
How can I set this up?
Try this:
HTML:
<label for="one"><input type="checkbox" name="one" id="one"></label>
<label for="two"><input type="checkbox" name="two" id="two"></label>
<label for="three"><input type="checkbox" name="three" id="three"></label>
<label for="four"><input type="checkbox" name="four" id="four"></label>
jQuery:
$('input[type="checkbox"]').on('change', function() {
if($('input[type="checkbox"]').eq(0).is(':checked')){
$('input[type="checkbox"]').not($(this)).attr('disabled', true);
}
else{
$('input[type="checkbox"]').not($(this)).attr('disabled', false);
}
});
Working example: https://jsfiddle.net/e26vnnk2/
If you are asking in order to find out how to disable all other "checkboxes," use radiogroups. If you are saying that the first checkbox auto-triggers a toggle on the other checkboxes, try ungrouping them, or making them separate in and of themselves, because it sounds as if you have some kind of faulty grouping and dependency there.

Checkbox: jQuery required function

This is the code I'm using to display questions where users are required to select one or more checkboxes as answers:
$QA = '<label for="q'.$QID.'-'.$Value.'"><input type="checkbox" name="q'.$QID.'[]" id="q'.$QID.'-'.$Value.'" value="'.$Value.'"> '.$QA.'</label>';
And here's a typical display:
<li id="q8">
<div class="Question">Which ones are countries?</div>
<div class="Answer">
<label for="q6-A"><input type="checkbox" name="q6[]" id="q6-A" value="A"> Texas</label>
<label for="q6-B"><input type="checkbox" name="q6[]" id="q6-B" value="B"> Japan</label>
<label for="q6-C"><input type="checkbox" name="q6[]" id="q6-C" value="C"> Spain</label>
</div>
</li>
I want to modify the code so that the form won't submit unless a user selects at least one checkbox. Every script I've tried requires them to choose EVERY checkbox, but I just want to make sure they attempt to answer the question by choosing ANY ONE checkbox.
Someone suggested the following script:
$('input[type=checkbox][name=gender]')[0].attr('required', 'required');;
So I replaced "name=gender" with "name=q6[]", but that doesn't work. I'm guessing the brackets after q6 might be a problem, but if I remove the brackets from the code that drives the form - name="q'.$QID.'[]" - then the test is scored incorrectly on the results page.
Another problem is that this script requires a specific name, when similar multiple-choice checkbox questions on various tests can have various names.
Is there some way to modify this script so that it targets ALL questions that have checkboxes, requiring users to select at least one checkbox?
Try this out...
if(($('input[name="q6[]"]:checked') != undefined) && ($('input[name="q6[]"]:checked') != null)) {
console.log("true");
} else {
console.log("false");
}

Checkboxes control Radio Checked/Unchecked

I have a checkout page with two radio buttons one for 'Register Account' and 'Guest Account' checkout methods.
I want a single checkbox that when it is checked, it checks the Register Account radio button and when it isn't checked it checks the Guest Account checkout radio button.
Here is my code so far:
http://jsfiddle.net/hQbpZ/160/
HTML:
Remember Me for Future Purposes :<input type="checkbox" id="checkbox1"/> <br/><br/>
Register Account :<input type="radio" id="radio1" name="radio"/><br>
Guest Checkout :<input type="radio" id="radio2" name="radio"/><br>
JS:
jQuery('#checkbox1').click(function(){
jQuery('#radio1').attr('checked', true);
});
jQuery('#checkbox1').click(function(){
jQuery('#radio2').attr('checked', false);
});
I got part of the functionality down but I don't know how to uncheck a radio button when a checkbox is unchecked.
You can do it like this:
jQuery('#checkbox1').click(function () {
jQuery('#radio1').prop('checked', $(this).is(':checked'));
jQuery('#radio2').prop('checked', !$(this).is(':checked'));
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
Remember Me for Future Purposes :
<input type="checkbox" id="checkbox1" />
<br/>
<br/>Register Account :
<input type="radio" id="radio1" name="radio" />
<br>Guest Checkout :
<input type="radio" id="radio2" name="radio" />
<br>
Just add a toggle variable and link the checked attribute to it
http://jsfiddle.net/hQbpZ/163/
var registered = false;
jQuery('#checkbox1').click(function(){
registered = !registered
jQuery('#radio1').attr('checked', registered);
jQuery('#radio2').attr('checked', !registered);
});
It is impossible to manually uncheck radio buttons, simply because they're not meant to be used that way (read more). The only way to have a radio button uncheck is by creating multiple radio buttons sharing the same name tag, meaning your HTML is already correct.
Your JavaScript does need some changes. It is not necessary to bind a function twice to the same event, so you could reduce it to one binding. Inside that binding you check whether the clicked checkbox is now on or off, and depending on that you check one of the two radio buttons, like so:
$('#checkbox1').click(function() {
if($('#checkbox1').prop('checked') === true) {
$('#radio1').attr('checked', true);
} else {
$('#radio2').attr('checked', false);
}
});

radio button selection in jquery

I have a set of two radio buttons having same id
<input type="radio" id="rad" name="mode"value="test" />test
<input type="radio" id="rad" name="mode" value="dev"/>dev
user have to select any one of the radio button.so while validating if second radio is selected the following validation alerts always.
if ($('#rad').prop('checked') != true ) {
alert(' Please Choose mode!!')
return false;
}
I only have to alert if user did not select any one of them.and no need to alert if user selected one radio button.
In my case if user select first radio button it alerts anything but choosing second radio it alerts Please Choose mode.
ID of element uniquely identifies the html element! read this if you keen :) https://softwareengineering.stackexchange.com/questions/127178/two-html-elements-with-same-id-attribute-how-bad-is-it-really
Also : http://jsfiddle.net/Pkq3B/
have fun, lemme know how it goes!
you could use class like this:
if (!$('.rad').is(':checked')) {
alert(' Please Choose mode!!')
return false;
}
html
<input type="radio" class="rad" name="mode"value="test" />test
<input type="radio" class="rad" name="mode" value="dev"/>dev
Try to use length of checked radio buttons like,
if (!$('input[name="mode"]:checked').length) {
alert(' Please Choose mode!!')
return false;
}
Working demo
You don't need jQuery for that purpose. You can use pure JavaScript:
if((document.getElementById('rad').value!='test')||document.getElementById('rad').value!='dev'))
{
alert("please select");
}

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