Events in JavaScript, When User or browser tries to manipulate pages then events occurred to handle the JavaScript’s interaction with HTML. As we know, JavaScript works with HTML, So, Everything that happens with pages loading, clicking a button, minimizing the window, click to mouse etc. all are the events. Like if we display any message to the user on a button click, this happens through the events. there are many things you need to study before reading javascript Events. You must know about Functions in Javascript.
All HTML elements like button, textbox, images can contain events that can be triggered using JavaScript code. And all these events are the part of DOM(Document Object Model). Here we will discuss some most frequent Events used in JavaScript:
Table of Content
OnClick Event occurs when a left mouse button is clicked, Like if you want to show any message or warning or data validation or something on button click you can do using Onclick event. As we display a message box in the example:
Example
<html>
<head>
<script type="text/javascript">
function Welcome() {
alert("Welcome to Programming With Basics")
}
</script>
</head>
<body>
<form>
<input type="button" onclick="Welcome()" value="Welcome to PWB"/>
</form>
</body>
</html>
Onmouseover event triggers when the mouse comes over the element contains the mouseover event. For example, if you want to highlight or want to change the color of the text when the mouse comes over the element then this event is used.
Example:
<html>
<head>
<script type="text/javascript">
function over() {
var x = document.getElementById("div1");
x.style.color = 'red';
}
</script>
</head>
<body>
<div id="div1" onmouseover="mouseover()">
<h2> Mouse Over </h2>
</div>
</body>
</html>
Read: How Controls Flow Works in Javascript.
Keyboard Event and Mouse Events: You can perform keyboard events test bt visiting a https://www.w3.org/2002/09/tests/keys-cancel2.html or you can also check how many keyboard or mouse events are active in a webpage for more information check below picture.
Press Ctrl + Shift + I or right click of any webpage click to the event listener, you will see a list of event listeners available for the web page. See the event listener in hacker rank programming solutions for day 8.
Below is the list of above-defined events, there are many more events in JavaScript:
All HTML elements like button, textbox, images can contain events that can be triggered using JavaScript code. And all these events are the part of DOM(Document Object Model). Here we will discuss some most frequent Events used in JavaScript:
Table of Content
- Events in Javascript
- Event list in JS Graphical
- Onclick Event in Javascript
- OnMouseOver in Javascript
- Example of Events
- List of Event in Javascript
- Keyboard Event operation perform
- Event Listeners Flow
- Author
Onclick Event
OnClick Event occurs when a left mouse button is clicked, Like if you want to show any message or warning or data validation or something on button click you can do using Onclick event. As we display a message box in the example:
Example
<html>
<head>
<script type="text/javascript">
function Welcome() {
alert("Welcome to Programming With Basics")
}
</script>
</head>
<body>
<form>
<input type="button" onclick="Welcome()" value="Welcome to PWB"/>
</form>
</body>
</html>
OnMouseOver :
Onmouseover event triggers when the mouse comes over the element contains the mouseover event. For example, if you want to highlight or want to change the color of the text when the mouse comes over the element then this event is used.
Example:
<html>
<head>
<script type="text/javascript">
function over() {
var x = document.getElementById("div1");
x.style.color = 'red';
}
</script>
</head>
<body>
<div id="div1" onmouseover="mouseover()">
<h2> Mouse Over </h2>
</div>
</body>
</html>
Read: How Controls Flow Works in Javascript.
Keyboard Event and Mouse Events: You can perform keyboard events test bt visiting a https://www.w3.org/2002/09/tests/keys-cancel2.html or you can also check how many keyboard or mouse events are active in a webpage for more information check below picture.
Press Ctrl + Shift + I or right click of any webpage click to the event listener, you will see a list of event listeners available for the web page. See the event listener in hacker rank programming solutions for day 8.
Below is the list of above-defined events, there are many more events in JavaScript:
Event Listeners Flow:
Check the Event Listener Propagations, How Events work when opening a webpage when we click on a button, link etc.
Author
This in-depth article of Event in JavaScript is written by Suman Yadav. You can also write to us, Submit your article and be a member of our A Programming Solutions Blog. Join us by sending a well-written article for more information visit Write for Us.
