根据 html 将 jQuery 代码转换为 javascript

Question

I have html and js code. But the javascript code is by jQuery and I want to convert this jQuery code to Javascript:

// jquery code
$('.hello[type="checkbox"]').on('change', function() {
   $(this).siblings('.hello[type="checkbox"]').not(this).prop('checked', false);
});

and my html markup:

<div>
    <span>Group 1:</span>
    <input type="checkbox" class="group1 hello" />
    <input type="checkbox" class="group1 hello" />
    <input type="checkbox" class="group1 hello" />
</div>

<div>
    <span>Group 2:</span>
    <input type="checkbox" class="group2 hello" />
    <input type="checkbox" class="group2 hello" />
    <input type="checkbox" class="group2 hello" />
</div>

<div>
    <span>Group 3:</span>
    <input type="checkbox" class="group3 hello" />
    <input type="checkbox" class="group3 hello" />
    <input type="checkbox" class="group3 hello" />
</div>

i want to use this code for check box input that i want to checked only one input by user

view demo

i try this code by changing and add attribute in html but it don`t work properly for group in the my questin

function checkOnlyOne(b){

var x = document.getElementsByClassName('daychecks');
var i;

for (i = 0; i < x.length; i++) {
  if(x[i].value != b) x[i].checked = false;
}
}

<div>
    <span>Group 3:</span>
    <input type="checkbox" class="group3 hello" onclick="checkOnlyOne(this.value); />
    <input type="checkbox" class="group3 hello" onclick="checkOnlyOne(this.value); />
    <input type="checkbox" class="group3 hello" onclick="checkOnlyOne(this.value); />
</div>

Answer 1

You can use querySelectorAll method to get elements using CSS selector.

 // jquery code document.querySelectorAll('.hello[type="checkbox"]').forEach(el => { el.addEventListener('change', function() { this.parentNode.querySelectorAll('.hello[type="checkbox"]').forEach(el1 => { if (el.== el1) el1;checked = false; }); }); });

 <div> <span>Group 1:</span> <input type="checkbox" class="group1 hello" /> <input type="checkbox" class="group1 hello" /> <input type="checkbox" class="group1 hello" /> </div> <div> <span>Group 2:</span> <input type="checkbox" class="group2 hello" /> <input type="checkbox" class="group2 hello" /> <input type="checkbox" class="group2 hello" /> </div> <div> <span>Group 3:</span> <input type="checkbox" class="group3 hello" /> <input type="checkbox" class="group3 hello" /> <input type="checkbox" class="group3 hello" /> </div>

---

FYI: You can achieve the same behaviour with radio button without any additional Javascript code, Just need to provide same name attribute for a group.

 <div> <span>Group 1:</span> <input type="radio" name="group1" class="group1 hello" /> <input type="radio" name="group1" class="group1 hello" /> <input type="radio" name="group1" class="group1 hello" /> </div>