Develop Reference

Javascript enable html when input checkbox checked

What should be the condition for: If i click the check box then the items for that particular brand is triggered?
Here I want to print the values for the item selected
The current code is showing Cannot read properties of null (reading 'addEventListener')
let filterBrand = document.getElementById("filter-brands");
filterBrand.addEventListener("change", function() {
if (filterBrand.value == "Amana") {
document.querySelector(".item-list").innerHTML = "";
for (let i = 0; i < productData.length; i++) {
console.log("hello");
}
}
});
<h5>Filter By Brand</h5>
<ul id="filter-brands">
<li>
<input type="checkbox" id="Amana" value="Amana" />
<label for="Amana">Amana</label>
</li>
<li>
<input type="checkbox" id="Frigidaire" value="Frigidaire" />
<label for="Frigidaire">Frigidaire</label>
</li>
<li>
<input type="checkbox" id="GE" value="GE" />
<label for="GE">GE</label>
</li>
<li>
<input type="checkbox" id="Insignia" value="Insignia" />
<label for="Insignia">Insignia</label>
</li>
<li>
<input type="checkbox" id="LG" value="LG" />
<label for="LG">LG</label>
</li>
<li>
<input type="checkbox" id="Samsung" value="Samsung" />
<label for="Samsung">Samsung</label>
</li>
<li>
<input type="checkbox" id="Whirlpool" value="Whirlpool" />
<label for="Whirlpool">Whirlpool</label>
</li>
</ul>

You can retrieve all checked checkboxes within ul#filter-brands using the css-selector #filter-brands input[type='checkbox']:checked. For example:
document.addEventListener(`click`, handle);
function handle(evt) {
if (evt.target.closest(`#filter-brands`)) {
console.clear();
const selected = [];
// all checked checkboxes
document.querySelectorAll(`#filter-brands input[type='checkbox']:checked`)
.forEach( cb => /* here you can insert code to display stuff */
selected.push(cb.id) );
console.log(`Selected: ${selected.length ? selected.join(`, `) : `NONE`}`);
}
}
<h5>Filter By Brand</h5>
<ul id="filter-brands">
<li>
<input type="checkbox" id="Amana" value="Amana" />
<label for="Amana">Amana</label>
</li>
<li>
<input type="checkbox" id="Frigidaire" value="Frigidaire" />
<label for="Frigidaire">Frigidaire</label>
</li>
<li>
<input type="checkbox" id="GE" value="GE" />
<label for="GE">GE</label>
</li>
<li>
<input type="checkbox" id="Insignia" value="Insignia" />
<label for="Insignia">Insignia</label>
</li>
<li>
<input type="checkbox" id="LG" value="LG" />
<label for="LG">LG</label>
</li>
<li>
<input type="checkbox" id="Samsung" value="Samsung" />
<label for="Samsung">Samsung</label>
</li>
<li>
<input type="checkbox" id="Whirlpool" value="Whirlpool" />
<label for="Whirlpool">Whirlpool</label>
</li>
</ul>
A more specific approach (handler per checkbox):
document.addEventListener(`click`, handle);
function handle(evt) {
if (evt.target.closest(`#filter-brands`) && evt.target.type === `checkbox`) {
const selected = evt.target.checked;
return document.querySelector(`[data-selector='${evt.target.id}']`)
.classList[evt.target.checked ? `add` : `remove`](`selected`);
}
}
ul {
display: inline-block;
max-width: 50vw;
}
ul#filter-brands {
float: left;
}
#brand-lists li {
display: none;
}
#brand-lists li.selected {
display: revert;
}
<h5>Filter By Brand</h5>
<ul id="filter-brands">
<li>
<input type="checkbox" id="Amana" value="Amana" />
<label for="Amana">Amana</label>
</li>
<li>
<input type="checkbox" id="Frigidaire" value="Frigidaire" />
<label for="Frigidaire">Frigidaire</label>
</li>
<li>
<input type="checkbox" id="GE" value="GE" />
<label for="GE">GE</label>
</li>
<li>
<input type="checkbox" id="Insignia" value="Insignia" />
<label for="Insignia">Insignia</label>
</li>
<li>
<input type="checkbox" id="LG" value="LG" />
<label for="LG">LG</label>
</li>
<li>
<input type="checkbox" id="Samsung" value="Samsung" />
<label for="Samsung">Samsung</label>
</li>
<li>
<input type="checkbox" id="Whirlpool" value="Whirlpool" />
<label for="Whirlpool">Whirlpool</label>
</li>
</ul>
<ul id="brand-lists">
<li data-selector="Amana">Amana list</li>
<li data-selector="Frigidaire">Frigidaire list</li>
<li data-selector="GE">GE list</li>
<li data-selector="Insignia">Insignia list
<li data-selector="LG">LG list</li>
<li data-selector="Samsung">Samsung list</li>
<li data-selector="Whirlpool">Whirlpool list</li>
</ul>

Exclude disabled checkboxes when using Select All

I have checkboxes with labels in table. I have added one checkbox outside the table "Select All" with id "chkbox". Now the below code is working fine. It is
Selecting and Deselecting all the checkboxes in the table. Now there are some pages where some checkboxes are disabled due to business logic. I want these checkboxes should not be affected.
<script type="text/javascript">
var s = jQuery.noConflict();
s(document).ready(function() {
s('#chkbox').change(function() {
var all = s('table').find('input[type="checkbox"]');
if (this.checked) {
all.prop('checked', true);
} else {
all.prop('checked', false);
}
});
});
</script>

Use :not() with :disabled selector.
var all = $('table').find('input[type="checkbox"]:not(:disabled)');
^^^^^^^^^^^^^^^^
This will not select the disabled checkboxes
$('#selectAll').change(function() {
$(':checkbox:not(:disabled)').prop('checked', this.checked);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.2/jquery.min.js"></script>
<input type="checkbox" id="selectAll" />Select All
<ul>
<li>
<input type="checkbox" disabled />
</li>
<li>
<input type="checkbox" />Not disabled</li>
<li>
<input type="checkbox" />Not disabled</li>
<li>
<input type="checkbox" disabled />
</li>
<li>
<input type="checkbox" />Not disabled</li>
</ul>
You can also use :enabled selector.
$('table').find('input[type="checkbox"]:enabled')
$('#selectAll').change(function() {
$(':checkbox:enabled').prop('checked', this.checked);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.2/jquery.min.js"></script>
<input type="checkbox" id="selectAll" /> Select All
<ul>
<li>
<input type="checkbox" disabled />
</li>
<li>
<input type="checkbox" />Not disabled</li>
<li>
<input type="checkbox" />Not disabled</li>
<li>
<input type="checkbox" disabled />
</li>
<li>
<input type="checkbox" />Not disabled</li>
</ul>
Note that: :enabled == :not(:disabled)

How to select next element using jquery?

I want to apply some design on the next element. But my problem is I am getting this error:
Error: Syntax error, unrecognized expression: [object Object] > label
Here's my selections:
BROWSE BY
<ul class="list-unstyled">
<li>
<input type="radio" id="cat-1" class="category_select" name="category_type" data-category-type="1" value="all_product" checked="checked" />
<label for="cat-1"><span></span>All</label>
</li>
<li>
<input type="radio" id="cat-2" class="category_select" name="category_type" data-category-type="2" value="japanese_tea" />
<label for="cat-2"><span></span>Japanese Tea</label>
</li>
<li>
<input type="radio" id="cat-3" class="category_select" name="category_type" data-category-type="3" value="black_vinegar" />
<label for="cat-3"><span></span>Black Vinegar</label>
</li>
<li>
<input type="radio" id="cat-4" class="category_select" name="category_type" data-category-type="4" value="food" />
<label for="cat-4"><span></span>Food</label>
</li>
<li>
<input type="radio" id="cat-5" class="category_select" name="category_type" data-category-type="5" value="cosmetic_health" />
<label for="cat-5"><span></span>Cosmetic / Health</label>
</li>
<li>
<input type="radio" id="cat-6" class="category_select" name="category_type" date-category-type="6" value="others" />
<label for="cat-6"><span></span>Others</label>
</li>
</ul>
Here's my JS:
$('.category_select').on('change', function() {
var cat = $(this);
var category_type = $(this).data('category-type');
$(cat + ' > label').css({'color':'red'}); //wont apply some css why?
});
Can you help me with this?

You need to use .next() traversal method to get the next sibling of an element
In your code cat is a jQuery object so when used in string concatenation your selector becomes [object Object] > label
$('.category_select').on('change', function() {
var cat = $(this);
var category_type = $(this).data('category-type');
cat.next('label').css({
'color': 'red'
}); //wont apply some css why?
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul class="list-unstyled">
<li>
<input type="radio" id="cat-1" class="category_select" name="category_type" data-category-type="1" value="all_product" checked="checked" />
<label for="cat-1"><span></span>All</label>
</li>
<li>
<input type="radio" id="cat-2" class="category_select" name="category_type" data-category-type="2" value="japanese_tea" />
<label for="cat-2"><span></span>Japanese Tea</label>
</li>
<li>
<input type="radio" id="cat-3" class="category_select" name="category_type" data-category-type="3" value="black_vinegar" />
<label for="cat-3"><span></span>Black Vinegar</label>
</li>
<li>
<input type="radio" id="cat-4" class="category_select" name="category_type" data-category-type="4" value="food" />
<label for="cat-4"><span></span>Food</label>
</li>
<li>
<input type="radio" id="cat-5" class="category_select" name="category_type" data-category-type="5" value="cosmetic_health" />
<label for="cat-5"><span></span>Cosmetic / Health</label>
</li>
<li>
<input type="radio" id="cat-6" class="category_select" name="category_type" date-category-type="6" value="others" />
<label for="cat-6"><span></span>Others</label>
</li>
</ul>

You can directly select the next label using the id attribute of selected input box
$('.category_select').on('change', function() {
var cat = this.id;
var category_type = $(this).data('category-type');
$("label").css({'color':'black'}) // Remove red color from previously selected item
$("label[for='"+cat+"']").css({'color':'red'}); // Apply red color on selected item
});
JSFIDDLE EXAMPLE

you need to use .next() selector for selecting the next element, instead $(cat + ' > label')
$('.category_select').on('change', function() {
var cat = $(this);
var category_type = $(this).data('category-type');
cat.next('label').css({'color':'red'}); //syntax for selecting next in js
});
Hope this helped you out??

how to get element class with condition children value determine?

Updated
i has code ex:
<ul>
<li class="menu-0">
<input class="id" type="text" value="1"/>
</li>
<li class="menu-0">
<input class="id" type="text" value="2"/>
</li>
<li class="menu-0">
<input class="parent_id" type="text" value="2"/>
</li>
<li class="menu-0">
<input class="parent_id" type="text" value="2"/>
</li>
<li class="menu-0">
<input class="id" type="text" value="3"/>
</li>
</ul>
so i want addClass parent-0 to li with condition this li children input class id val() = this li next() children input class parent_id val().
it like
<ul>
<li class="menu-0">
<input class="id" type="text" value="1"/>
</li>
<li class="menu-0 parent-0">
<input class="id" type="text" value="2"/>
</li>
<li class="menu-0 children-parent-0">
<input class="parent_id" type="text" value="2"/>
</li>
<li class="menu-0 children-parent-0">
<input class="parent_id" type="text" value="2"/>
</li>
<li class="menu-0 ">
<input class="id" type="text" value="3"/>
</li>
</ul>
how to made it. thanks :]

Try this code:
$('.menu-0').each(function(){
if($(this).children('input').val() == '2')
{
$(this).addClass('parent-0');
}
});
Or more generic:
$('li').each(function(){
var num = $(this).attr('class').split('-').reverse();
if($(this).children('input').val() == '2')
{
$(this).addClass('parent-'+num[0]);
}
});

jQuery show hide divs on radio buttons

I have got a group of radio buttons that when clicked need to display a corresponding unordered list. I have got as far as showing the correct list according to which radio button is clicked but cannot figure out how to hide the other lists that need to be hidden. So if i click the second benefits radion then the second 'spend' ul will display and the other 'spend' uls will hide.
This is my jQuery:
// hide all except first ul
$('div.chevron ul').not(':first').hide();
//
$('div.chevron > ul > li > input[name=benefits]').live('click',function() {
// work out which radio has been clicked
var $radioClick = $(this).index('div.chevron > ul > li > input[name=benefits]');
var $radioClick = $radioClick + 1;
$('div.chevron > ul').eq($radioClick).show();
});
// trigger click event to show spend list
var $defaultRadio = $('div.chevron > ul > li > input:first[name=benefits]')
$defaultRadio.trigger('click');
And this is my HTML:
<div class="divider chevron">
<ul>
<li><strong>What benefit are you most interested in?</strong></li>
<li>
<input type="radio" class="inlineSpace" name="benefits" id="firstBenefit" value="Dental" checked="checked" />
<label for="firstBenefit">Dental</label>
</li>
<li>
<input type="radio" class="inlineSpace" name="benefits" id="secondBenefit" value="Optical" />
<label for="secondBenefit">Optical</label>
</li>
<li>
<input type="radio" class="inlineSpace" name="benefits" id="thirdBenefit" value="Physiotherapy" />
<label for="thirdBenefit">Physiotherapy, osteopathy, chiropractic, acupuncture</label>
</li>
</ul>
<ul>
<li><strong>How much do you spend a year on Dental?</strong></li>
<li>
<input type="radio" class="inlineSpace" name="spend" id="rate1a" value="£50" />
<label for="rate1a">£50</label>
</li>
<li>
<input type="radio" class="inlineSpace" name="spend" id="rate2a" value="£100" />
<label for="rate2a">£100</label>
</li>
<li>
<input type="radio" class="inlineSpace" name="spend" id="rate3a" value="£150" />
<label for="rate3a">£150</label>
</li>
</ul>
<ul>
<li><strong>How much do you spend a year on Optical?</strong></li>
<li>
<input type="radio" class="inlineSpace" name="spend" id="rate1b" value="£50" />
<label for="rate1a">£50</label>
</li>
<li>
<input type="radio" class="inlineSpace" name="spend" id="rate2b" value="£100" />
<label for="rate2a">£100</label>
</li>
<li>
<input type="radio" class="inlineSpace" name="spend" id="rate3b" value="£150" />
<label for="rate3a">£150</label>
</li>
</ul>
<ul>
<li><strong>How much do you spend a year on Physiotherapy, osteopathy, chiropractic, acupuncture?</strong></li>
<li>
<input type="radio" class="inlineSpace" name="spend" id="rate1c" value="£50" />
<label for="rate1a">£50</label>
</li>
<li>
<input type="radio" class="inlineSpace" name="spend" id="rate2c" value="£100" />
<label for="rate2a">£100</label>
</li>
<li>
<input type="radio" class="inlineSpace" name="spend" id="rate3c" value="£150" />
<label for="rate3a">£150</label>
</li>
</ul>
<label class="button"><input type="submit" value="View your quote" class="submit" /></label>
</div>
I tried using:
$('div.chevron > ul').not($radioClick).hide();
But that yielded a bad result where all the lists where hidden.
Thanks in advance.

This will hide the currently visible one.. ( you should run it before showing the newly clicked ul )
$('div.chevron > ul:visible').hide();

thanks. I solved it with:
$('div.chevron > ul:visible').hide();
$('div.chevron > ul:first').show();
$('div.chevron > ul').eq($radioClick).show();
I don't know what it is but i always seem to over complicate stuff like this in my code when the answer is very easy.