EN
JavaScript - onkeydown event example
0
points
In this article, we would like to show you onkeydown event example in JavaScript.
Quick solution:
var myElement = document.querySelector('#my-element');
myElement.addEventListener('keydown', function() {
console.log('onkeydown event occurred.');
});
or:
<input type="text" onkeydown="handleKeydown()">
or:
var myElement = document.querySelector('#my-element');
myElement.onkeydown = function() {
console.log('onkeydown event occurred.');
};
Practical examples
There are three common ways how to use onkeydown event:
- with event listener,
- with element attribute,
- with element property.
1. Event listener based example
In this section, we want to show how to use onkeydown event on input element via event listener mechanism.
// ONLINE-RUNNER:browser;
<!doctype html>
<html>
<body>
<p>Type something: </p>
<input type="text" id="my-input">
<script>
var myInput = document.querySelector('#my-input');
myInput.addEventListener('keydown', function() {
console.log('onkeydown event occurred.');
});
</script>
</body>
</html>
2. Attribute based example
In this section, we want to show how to use onkeydown event on input element via attribute.
// ONLINE-RUNNER:browser;
<!doctype html>
<html>
<body>
<p>Type something: </p>
<input type="text" onkeydown="handleKeydown()">
<script>
function handleKeydown(){
console.log('onkeydown event occurred.');
}
</script>
</body>
</html>
3. Property based example
In this section, we want to show how to use onkeydown event on input element via property.
// ONLINE-RUNNER:browser;
<!doctype html>
<html>
<body>
<p>Type something: </p>
<input type="text" id="my-input">
<script>
var myInput = document.querySelector('#my-input');
myInput.onkeydown = function() {
console.log('onkeydown event occurred.');
};
</script>
</body>
</html>