JSFiddle - React, Tailwind, and code Playground

by zlojnaxa

HTML

<input type="checkbox" class="checkboxId">
<input type="checkbox" class="checkboxId">
<input type="checkbox" class="checkboxId">

<input type="submit" class="btn" disabled>

JavaScript

let checkboxId = document.querySelectorAll('.checkboxId'), count = 0, btn = document.querySelectorAll('.btn')[0];

[...checkboxId].forEach((e)=>{
    e.addEventListener('change',()=> {
        !e.checked ? count-- : count++;
        count == 0 ? btn.disabled = true : btn.disabled = false;
    },false);
});