Kubadilishana kwa Vihusishi bila Thamani

Acha kuna kiingizio kilichozuiwa na kifungo:

html<input id="elem" disabled>
<input id="button" type="submit">

Wacha tufanye ili kila kubonyeza kifungo kusababisha kubadilisha hali ya kiingizio - kutoka kuzuiwa hadi kuzuiwa ondoshwa na vice versa. Kwanza tupate viungo kwa vipengele vyetu kwenye vigeu:

javascriptlet elem   = document.querySelector('#elem');
let button = document.querySelector('#button');

Sasa tutekeleze yale tuliyokusudia:

javascriptbutton.addEventListener('click', function() {
  if (elem.disabled) {
    elem.disabled = false;
  } else {
    elem.disabled = true;
  }
});

Hata hivyo, shida inaweza kutatuliwa kwa kiwango kidogo cha msimbo:

javascriptbutton.addEventListener('click', function() {
  elem.disabled = !elem.disabled;
});