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JavaScript - onclick event for input checkbox element example

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In this article few ways how to handle click event for input checkbox element has been described.

1. onclick attribute example

// ONLINE-RUNNER:browser;

<!doctype html>
<html>
<body>
  <label>
  	<input type="checkbox" onclick="onClick(this)" /> Agreement
  </label>
  <script>

    function onClick(element) {
    	console.log('Agreement changed to ' + element.checked + ' by onclick event.');
    }

  </script>
</body>
</html>

2. onclick property example

// ONLINE-RUNNER:browser;

<!doctype html>
<html>
<body>
  <label>
  	<input id="agreement" type="checkbox" /> Agreement
  </label>
  <script>

    var agreement = document.getElementById('agreement');

    agreement.onclick = function(element) {
    	console.log('Agreement changed to ' + agreement.checked + ' by onclick event.');
    };

  </script>
</body>
</html>

3. addEventListener method example

// ONLINE-RUNNER:browser;

<!doctype html>
<html>
<body>
  <label>
  	<input id="agreement" type="checkbox" /> Agreement
  </label>
  <script>

    var agreement = document.getElementById('agreement');

    agreement.addEventListener('click', function(element) {
    	console.log('Agreement changed to ' + agreement.checked + ' by click event.');
    });

  </script>
</body>
</html>

 

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