JavaScript is a popular programming language used to make websites interactive. It works alongside HTML and CSS, which are used to create the structure and style of web pages. JavaScript runs in your web browser, allowing you to change the content of a webpage, respond to user actions, and create fun experiences for users.
Introduction to javascript tutorial
History: JavaScript was created by Brendan Eich in 1995 while he was at Netscape. It was first called Mocha, then LiveScript, and finally became known as JavaScript.
Here are some important parts of JavaScript:
- Variables: These are used to store information. You can create variables using
var,let, orconst. - Data Types: JavaScript can handle different types of data like numbers, words (strings), true/false values (booleans), lists (arrays), and objects.
- Functions: Functions are sets of code that perform specific tasks. They help you organize your code.
- Control Flow: This includes rules like
ifstatements and loops that control how your code runs. - Events: JavaScript can respond to actions like clicks or form submissions by running specific code when these actions happen.
- DOM Manipulation: JavaScript can change the content of a webpage using the Document Object Model (DOM).
- Asynchronous Programming: JavaScript can do many tasks at once without slowing things down. This is useful for things like loading data from the internet.
- Libraries and Frameworks: There are many tools built on JavaScript, such as React and jQuery, that help you build websites more easily.
To start using JavaScript, you can add code directly in an HTML file with the <script> tag or create separate files with a .js extension. You can also test your code in your browser’s developer tools or use a tool like Node.js to run JavaScript on a server.
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