HTML button onclick
snippet in html

HTML button onclick

user3905

<!DOCTYPE html>
<html>
  <head>
    <title>Title of the document</title>
  </head>
  <body>
    <p>There is a hidden message for you. Click to see it.</p>
    <button onclick="myFunction()">Click me!</button>
    <p id="demo"></p>
    <script>
      function myFunction() {
        document.getElementById("demo").innerHTML = "Hello Dear Visitor!</br> We are happy that you've chosen our website to learn programming languages. We're sure you'll become one of the best programmers in your country. Good luck to you!";
      }
    </script>
  </body>
</html>

onclick a tag

user8885

<a href='http://www.google.com' onclick='return check()'>check</a>

<script type='text/javascript'>
function check() {
    return false;
}
</script>

javascript click event

user7762

<button onclick="myFunction()">Click me</button>

<p id="demo"></p>

<script>
function myFunction() {
  document.getElementById("demo").innerHTML = "Hello World";
}
</script>

how to add onclick event in javascript

user9822

var element = document.getElementById("elem");
element.onclick = function(event) {
  console.log(event);
}

javascript button onclick

user2515

document.getElementById('button').onclick = function() {
   alert("button was clicked");
};

javascript onclick button

user8085

var button = document.querySelector('button');
button.onclick = function() {
  //do stuff
}