Effortless JavaScript: Calling Functions in HTML Like a Pro 🚀
Calling a JavaScript function from HTML is a fundamental skill in web development. This process involves defining JavaScript functions and linking them to HTML elements through event handlers. Below, we’ll explore how to define and call JavaScript functions using various methods in HTML.
Defining a JavaScript Function
First, you need to define a JavaScript function. Functions in JavaScript can be defined in the <script> tag within an HTML document or in an external JavaScript file. Here’s a simple example of a function that displays an alert:
function showMessage() {
alert('Hello, this is a message!');
}This function, named showMessage, will display an alert with a message when called.
Calling Functions with Inline Event Handlers
You can call JavaScript functions directly from HTML elements using inline event handlers. For example, you can attach a function to a button click event:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Call JavaScript Function</title>
<script>
function showMessage() {
alert('Hello, this is a message!');
}
</script>
</head>
<body>
<button onclick="showMessage()">Click Me</button>
</body>
</html>The onclick attribute is used to call the showMessage function when the button is clicked.
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Originally published at https://www.rustcodeweb.com on August 15, 2024.
