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

Treat "checked" as a boolean, not as a string.

You can just invert it, as in

element = document.getElementById("check")
element.checked = !element.checked

A more featured example:

var $toggle = document.getElementById('toggle');
var $checkbox = document.getElementById('checkbox');



var toggle_checkbox = function() {
   $checkbox.checked = !checkbox.checked;
}

$toggle.addEventListener('click',toggle_checkbox);

  Checkbox:
  

Toggle