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What is HTML, CSS & Javascript ?

Hello Friends welcome to the FreeSiteTools website. If you want to know about what is HTML, CSS & Javascripts. So Today i am telling about what is HTML code, CSS & Javascripts.

What is HTML Code ?

HTML (Hypertext Markup Language) is a markup language used for creating web pages and other types of online content. HTML code consists of a series of elements, which are enclosed in angle brackets (< >) and typically come in pairs, with a start tag and an end tag.


The content of a web page is defined by HTML elements, which include headings, paragraphs, lists, images, links, and more. Each element has its own set of attributes that define its behavior and appearance, such as the size of an image, the target URL of a link, or the color of text.

Here is an example of a simple HTML document that includes a heading, a paragraph, and an image:

php
<!DOCTYPE html>
<html>
  <head>
    <title>My Web Page</title>
  </head>
  <body>
    <h1>Welcome to My Web Page</h1>
    <p>This is a paragraph of text.</p>
    <img src="image.jpg" alt="An example image">
  </body>
</html>

In this example, the '<!DOCTYPE html>' declaration specifies that the document is an HTML5 document. The '<html>' element is the root element of the document, and it contains two child elements: the '<head>' element, which contains metadata about the document, and the '<body>' element, which contains the content of the document.



The '<title>' element inside the '<head>' element specifies the title of the web page, which is displayed in the browser's title bar. The '<h1>' element inside the '<body>' element specifies a top-level heading, and the '<p>' element specifies a paragraph of text. Finally, the '<img>' element specifies an image with a 'src' attribute that points to the image file, and an 'alt' attribute that provides alternative text for the image.

What is CSS ?


CSS stands for Cascading Style Sheets. It is a stylesheet language used for describing the presentation of a document written in HTML or XML (including various XML languages like SVG or XHTML). CSS is used to style and format the layout of web pages and user interfaces, including fonts, colors, margins, padding, and positioning.



CSS allows web designers to separate the presentation of a document from its content, enabling a consistent look and feel across multiple pages or an entire website. By using CSS, designers can easily change the layout and styling of a site without having to change the content itself.


CSS works by using selectors to target specific elements on a web page and then applying rules to those elements. The rules can specify various properties, such as font-size, color, background-color, and more. CSS also supports various layout and positioning techniques, such as floats, grids, and flexboxes, to control the positioning of elements on a page.



Overall, CSS is an essential tool for web designers and developers, enabling them to create visually appealing and user-friendly websites that are consistent across different platforms and devices.

What is Javascript ?


JavaScript is a high-level programming language used primarily for creating dynamic, interactive web pages and applications. It is a client-side scripting language, meaning that it runs in a user's web browser rather than on a web server.



JavaScript is used to add interactivity to web pages, such as form validation, creating animations, and changing the content of a web page dynamically. It can also be used for more complex tasks, such as creating games, building web applications, and integrating with other technologies like APIs and databases.



JavaScript syntax is similar to other programming languages, such as C++, Java, and Python. It supports object-oriented programming (OOP) and functional programming paradigms, and has a wide range of built-in functions and libraries that make it a versatile language.



Here's an example of a simple JavaScript program that displays an alert box when a button is clicked:

javascript
// Select the button element
const myButton = document.querySelector('#my-button');

// Add an event listener to the button
myButton.addEventListener('click', function() {
  // Display an alert box
  alert('Hello, world!');
});

In this example, the 'querySelector' method is used to select the button element with an 'id' of 'my-button'. The 'addEventListener' method is then used to add a click event listener to the button, which displays an alert box when the button is clicked. This is just a simple example, but JavaScript can be used for much more complex tasks and projects.