Develop Reference

How to hide and unhide form fields based on a radio button?

I'm trying to implement a radio button, which if clicked should get more options for the user to fill in.
Here's what I've tried.
<script>
function addmentor() {
if ( document.getElementById("type_Computer").checked ) {
document.getElementById('nextSetOfComputerOptions').style.display = "";
} else {
document.getElementById('nextSetOfComputerOptions').style.display = "none";
}
}
</script>
<input type="radio" name="type" id="type_computer" value="Computer" onClick="addmentor()">Add Mentor</button>
<div id="nextSetOfComputerOptions" style="display:none;">
.
.
</div>
The above code doesn't work. When I am clicking the radio button, nothing happens, the part of the form is always hidden.

EDIT: I originally misunderstood the question and have now adjusted my answer.
Additionally, I have also included a function that will hide your input if another radio button is clicked.
See the snippet below:
//your checkbox
var checkbox = document.getElementById("type_computer");
//your div
var inputDiv = document.getElementById("nextSetOfComputerOptions");
//function that will show hidden inputs when clicked
function addmentor() {
if (checkbox.checked = true) {
inputDiv.style.display = "block";
}
}
//function that will hide the inputs when another checkbox is clicked
function hideInputDiv() {
inputDiv.style.display = "none";
}
<input type="radio" name="type" id="type_computer" value="Computer" onChange="addmentor();" ">Add Mentor</input>
<input type="radio" name="type" onClick="hideInputDiv();">Other radio input</input>
<div id="nextSetOfComputerOptions" style="display: none;">
<input placeholder="PC"></input>
<input placeholder="Mac"></input>
</div>

Radio button is showing div on selection but not hiding after selecting a different radio button

I have three divs I want to show based on a radio selection. I've written the below script, but the problem I've run into is the div doesn't hide after a different radio button is selected. I'm using ucalc so I can't change the class names or ids of the divs or the radio buttons so have to work with that.
Note, the radio button is automatically selected when the form loads so the first div needs to be showing initially.
Code below:
$(document).ready(function(){
// First Div/Radio Button
$('#input_radio-30-0-des').on('change', function(){
var a = $(this).prop('checked');
if(a) {
$("#grid-40-42").show();
} else {
$("#grid-40-42").hide();
}
});
// Second Div/Radio Button
$("#grid-44-46").hide();
$('#input_radio-30-1-des').on('change', function(){
var a = $(this).prop('checked');
if(a) {
$("#grid-44-46").show();
} else {
$("#grid-44-46").hide();
}
});
// Third Div/Radio Button
$("#grid-46-48").hide();
$('#input_radio-30-2-des').on('change', function(){
var a = $(this).prop('checked');
if(a) {
$("#grid-46-48").show();
} else {
$("#grid-46-48").hide();
}
});
});
I'm not very familiar with writing javascript (you can probably tell!) so an explanation for 'dummies' would be appreciated!
Thank you for your help!

You need to hide 2nd & 3rd div by CSS and when user change other button then find ID so according to ID show that div and rest div will hide as below snippet.
$(document).ready(function(){
$('#input_radio-30-0-des, #input_radio-30-1-des, #input_radio-30-2-des').on('change', function(){
var getid = $(this).attr('id');
if (getid=='input_radio-30-0-des') {
$('#grid-44-46, #grid-46-48').hide()//2nd and 3rd div hide
$("#grid-40-42").show();
}
if (getid=='input_radio-30-1-des') {
$('#grid-40-42, #grid-46-48').hide()//1st and 3rd div hide
$("#grid-44-46").show();
}
if (getid=='input_radio-30-2-des') {
$('#grid-40-42, #grid-44-46').hide()//1st and 2rd div hide
$("#grid-46-48").show();
}
})
});
#grid-44-46, #grid-46-48{display: none;}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<label><input type="radio" name="div-show-hide" id="input_radio-30-0-des" checked> Button One</label>
<label><input type="radio" name="div-show-hide" id="input_radio-30-1-des"> Button Two</label>
<label><input type="radio" name="div-show-hide" id="input_radio-30-2-des"> Button Three</label>
<div id="grid-40-42"><h2>Show - Div One</h2></div>
<div id="grid-44-46"><h2>Show - Div Two</h2></div>
<div id="grid-46-48"><h2>Show - Div Three</h2></div>

Use wild card to hide all <div> which id start with grid- on radio change.
$("[id^=grid-]").hide();
$('#input_radio-30-0-des').on('change', function() {
$("[id^=grid-]").hide();
var a = $(this).prop('checked');
if (a) {
$("#grid-40-42").show();
} else {
$("#grid-40-42").hide();
}
});
$('#input_radio-30-1-des').on('change', function() {
$("[id^=grid-]").hide();
var a = $(this).prop('checked');
if (a) {
$("#grid-44-46").show();
} else {
$("#grid-44-46").hide();
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input type='radio' id='input_radio-30-0-des' name="group1" />
<div id='grid-40-42'>grid-40-42</div>
<input type='radio' id='input_radio-30-1-des' name="group1" />
<div id='grid-44-46'>grid-40-46</div>
Note
No need multi-pal $(document).ready(function(){ .
Id must be unique.

I'm using a Javascript object to match each Radio button with it's targeted div.
I assume they are hidden by default. Just having fun and giving an alternative to multiple checks! A cleaner code also where you could easily setup all those confusing names...
$( document ).ready(function() {
let matches = {
"input_radio-30-0-des": 'grid-40-42',
"input_radio-30-1-des": 'grid-44-46',
"input_radio-30-2-des": 'grid-46-48'
};
$(":input[name='FM']").on("change", function () {
var target= matches[$(this).attr('id')];
$('#' +target).toggle($(this).checked);
$("[id^=grid-]").not('#' +target).hide();
})
});
div[id*='grid-'] { display: none; }
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input type="radio" name="FM" id="input_radio-30-0-des" value="0"/>
<label for="input_radio-30-0-des">0</label>
<input type="radio" name="FM" id="input_radio-30-1-des" value="1"/>
<label for="input_radio-30-1-des">1</label>
<input type="radio" name="FM" id="input_radio-30-2-des" value="2"/>
<label for="input_radio-30-2-des">2</label>
<div id="grid-40-42">40-42</div>
<div id="grid-44-46">44-46</div>
<div id="grid-46-48">46-48</div>

Adding ID to button, but must change based on radio input selection

EDITED TO ADD HTML: not exactly the same since im not in my office anymore, but you'll get the idea.
The scenario is i have a part of a site where users can pick 1 of multiple addresses they have saved. The ID gets generated for each address and I need to apply that ID to a button to submit the form.
I've gotten it so the button receives the ID from the first click, but if I try to select a different address, the ID will not switch. How can I have the button use the ID of the most recently selected radio input? I'm using a data attribute to select this.
HTML:
<div>
<form>
<input type="radio" data-js="select" id="Test123" /> (id created dynamically)
<label>Address 1</label>
<input type="radio" dat-js="select" id="Test124" /> (id created dynamically)
<label>Address 2</label>
</form>
</div>
<button class="address-continue">Continue</button>
var radioID = $('*[data-js]').attr('id');
var addrContinue = $('.address-continue');
$('*[data-js]').click(function () {
$(addrContinue).attr('id', radioID);
});
Scenario: user clicks on address 1, so ID is then placed on the button for address 1. user made a mistake, meant to click on address 2. currently when i click address 2, the ID on the button doesn't change. it remains the same as the original click.
I need the ID on the continue button to change based on the proper radio selection.

Since id is unique use class
$('*[data-js]').click(function () {
var addrButton = $('.address-continue');
addrButton.removeClass(test123);
addrButton.removeClass(test124);
radioID = $('*[data-js]').attr('id');
addrButton.addClass(radioID);
});
Also your basic problem might be because you did not collect your radioID in ur radio function hence it wasn't updated so try this
$('*[data-js]').click(function () {
var radioID = $('*[data-js]').attr('id');
$(addrContinue).attr('id', radioID);
});

The following should do it for you hoping the corresponding elements are in the same order:
$('[data-js]').on('change',function() {
$('.address-continue').data('id', this.id);
});
$('.address-continue').on('click',function() {
alert( $(this).data('id') );
});
You cannot assign a second element in your document the id of another. IDs should be unique; therefore I have used data-id.
$('[data-js]').on('change',function() {
$('.address-continue').data('id', this.id);
});
$('.address-continue').on('click',function() {
alert( $(this).data('id') );
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div>
<form>
<input type="radio" name="address" data-js="select" id="Test123" /> (id created dynamically)
<label>Address 1</label>
<input type="radio" name="address" data-js="select" id="Test124" /> (id created dynamically)
<label>Address 2</label>
</form>
</div>
<button class="address-continue">Continue</button>

Get output of .change() function in .click() function

I have two radio buttons which both have values. When one is selected, and a button/link is clicked, the value of the selected radio button needs to be outputted to a text box.
Here is my HTML:
<form class="discount-choice" method="post" action="#">
<ul>
<li>
<input type="radio" value="1" name="discount" id="1-month" class="discount-checkbox" />
<label for="1-month">1 Month - no discount</label>
</li>
<li>
<input type="radio" value="0.95" name="discount" id="4-months" class="discount-checkbox" />
<label for="4-months">4 months - 5% discount</label>
</li>
</ul>
Get Result
<input type="text" class="result" />
</form>
and my JavaScript (jQuery):
var discount = $(".discount-checkbox").on("click", function () {
return this.value;
});
$(".get-result").on("click", function() {
$(".result").attr("value", discount);
});
When I click the button (after having selected a radio button), I just get [object Object] in the text box.
I'm not sure of the syntax for setting a variable to be a jQuery function so this is likely where I am going wrong. If anyone could give me some guidance that would be awesome.
Thank you for any help :)

discount is set to the jQuery object returned by $(".discount-checkbox"). You need to bind a click handler that updates a variable:
var discount = 0;
$(".discount-checkbox").on("click", function () {
discount = this.value;
});

Use this:
$(".get-result").on("click", function(e) {
e.preventDefault();
$(".result").val( $('.discount-checkbox:checked').val() );
});
You do not need the click handler on the checkbox as #billyonecan has mentioned in the comments.
And ... if you really need to attach an event handler to the checkboxes, that would be a change event handler instead of click.

Try This Code:
var discount;
$(".discount-checkbox").on("click", function () {
discount= this.value;
});
$(".get-result").on("click", function() {
$(".result").attr("value", discount);
});

no need of discount-checkbox click event
$(".get-result").on("click", function() {
var discount = $(".discount-checkbox:checked").val();
$(".result").val(discount);
});

Javascript display same content on each checkbox clicks?

I have multiple check boxes and i want them to display the same content when each of them is clicked. Now when I click on one check box, the content appears, but until I unclick it the next checkbox won't display any content. I want the all the contents to be displayed as long as check boxes are clicked. any tip with this.
I tried this:
function showTime(days){
var showTime = document.getElementById("time_schedules");
var days = document.getElementById("schedule");
if (days.checked) {
showTime.style.display = "Block";
}
else{
showTime.style.display = "none";
}
}

Insert some class attribute to all your checkboxes so you can select them, then capture the click event, iterate over all checkboxes and perform whatever you need to do (setting label etc).
I recommend using some javascript library such as jquery, for example:
<input type="checkbox" name="cb1" class="cb" />
<label for="cb1" class="cblabel">label1</label>
<input type="checkbox" name="cb2" class="cb" />
<label for="cb2" class="cblabel">label2</label>
$('.cb').bind('click', function() {
$('.cblabel').each(function(i,v) { v.innerHTML = 'hello'; });
});
http://jsfiddle.net/3EMyY/