toggle checkbox with javascript

Question

I want to uncheck a checkbox using javascript. I have one button which just unchecks the box and works fine:

function clear() {
document.getElementById(\"check\"         


        

Answer 1

You need a boolean to do that.

Take a look at this pen:

https://codepen.io/anon/pen/jJyXgO

let checkbox = document.querySelectorAll('#check')[0]

setInterval(function() {
  checkbox.checked = !checkbox.checked
}, 1000)