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JavaScript is a versatile programming language that adds interactivity to web pages. It can be used for various tasks such as manipulating HTML, handling events, and more.
Example: Changing Text Content
Here's a simple example of how to change the text content of an HTML element using JavaScript:
<!DOCTYPE html><html><body><h1 id="myHeading">Hello World!</h1><script>document.getElementById("myHeading").textContent = "Hello JavaScript!";</script></body></html>Copied!âś•CopyVariables
Variables store data values. You can declare a variable using let, const, or var.
let myVariable = "Hello";const myConstant = 42;var myOldVariable = true;Copied!âś•CopyFunctions
Functions are blocks of code designed to perform a particular task. They are executed when called.
function greet(name) {return "Hello, " + name;}console.log(greet("Alice")); // Output: Hello, AliceCopied!âś•CopyEvents
Events are actions that occur in the browser, such as clicks or key presses. You can use event listeners to run code in response to these events.
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