function greetMe(yourName) { alert("Hello " + yourName); }
greetMe("World");
Select the code in the pad and hit Ctrl+R to watch it unfold in your
browser!
HTML and CSS are the basic technologies you need to create a website. HTML is used to create the structure of a website, while CSS is used to control the layout and appearance of a website. In this section, you will learn the basics of HTML and CSS, including how to create a simple webpage and style it using CSS.
All HTML documents must start with following declaration:
<!DOCTYPE html>
- HTML stands for HyperText Markup Language
- CSS stands for Cascading Style Sheets
- HTML is used to create the structure of a webpage
- CSS is used to control the layout and appearance of a webpage
- HTML and CSS work together to create a webpage
To get started with HTML and CSS, you will need a text editor and a web browser. You can use any text editor to write HTML and CSS code, such as Notepad, Sublime Text, or Visual Studio Code. Once you have written your code, you can save it with a .html or .css file extension, depending on whether it is HTML or CSS code.
<html></html>
- Choose a text editor
- Write your HTML code
- Write your CSS code
- Save your files with appropriate extensions
- Open your HTML file in a web browser
HTML stands for HyperText Markup Language, and it is used to create the structure of a webpage. HTML uses a series of elements to define the different parts of a webpage, such as headings, paragraphs, and images. CSS stands for Cascading Style Sheets, and it is used to control the layout and appearance of a webpage. CSS uses a series of rules to style the different elements of a webpage, such as setting the font size, color, and spacing of text.
<head></head>
- HTML elements define the structure of a webpage
- CSS rules control the appearance of a webpage
- HTML elements include headings, paragraphs, and images
- CSS rules include font size, color, and spacing
- HTML and CSS work together to create a webpage
HTML and CSS work together to create a webpage. HTML is used to create the structure of a webpage, while CSS is used to control the layout and appearance of a webpage. HTML uses a series of elements to define the different parts of a webpage, such as headings, paragraphs, and images. CSS uses a series of rules to style the different elements of a webpage, such as setting the font size, color, and spacing of text.
Here is an example of a simple HTML file:
<!DOCTYPE html>
<html>
<head>
<title>My First Webpage</title>
<link rel="stylesheet" href="styles.css">
</head>
<body>
<h1>Hello, World!</h1>
<p>This is my first webpage.</p>
</body>
</html>
And here is an example of a simple CSS file:
body {
font-family: Arial, sans-serif;
background-color: #f0f0f0;
}
h1 {
color: #333333;
}
p {
color: #666666;
}
- HTML defines the structure of a webpage
- CSS controls the appearance of a webpage
- HTML elements include headings, paragraphs, and images
- CSS rules include font size, color, and spacing
- HTML and CSS work together to create a webpage
HTML is supported by all modern web browsers, including Chrome, Firefox, Safari, and Edge. This means that you can use HTML to create a webpage that will work in all of these browsers. However, older versions of Internet Explorer may not support all HTML elements, so you may need to use a polyfill or fallback for these browsers.
<meta charset="UTF-8">
- HTML is supported by modern web browsers
- Chrome, Firefox, Safari, and Edge support HTML
- Older versions of Internet Explorer may not support all HTML elements
- Use a polyfill or fallback for older browsers
- HTML is essential for creating webpages
CSS is supported by all modern web browsers, including Chrome, Firefox, Safari, and Edge. This means that you can use CSS to style a webpage that will work in all of these browsers. However, older versions of Internet Explorer may not support all CSS properties, so you may need to use a polyfill or fallback for these browsers.
body { background-color: #f0f0f0; }
- CSS is supported by modern web browsers
- Chrome, Firefox, Safari, and Edge support CSS
- Older versions of Internet Explorer may not support all CSS properties
- Use a polyfill or fallback for older browsers
- CSS is essential for styling webpages
JavaScript is a programming language that is used to create interactive elements on a webpage. JavaScript can be used to add functionality to a webpage, such as creating pop-up windows, validating forms, and animating elements. In this section, you will learn the basics of JavaScript, including how to add JavaScript to a webpage and create simple interactive elements.
- JavaScript adds interactivity to webpages
- JavaScript can create pop-up windows
- JavaScript can validate forms
- JavaScript can animate elements
- JavaScript is essential for creating dynamic webpages
JavaScript is supported by all modern web browsers, including Chrome, Firefox, Safari, and Edge. This means that you can use JavaScript to create interactive elements on a webpage that will work in all of these browsers. However, older versions of Internet Explorer may not support all JavaScript features, so you may need to use a polyfill or fallback for these browsers.
Once you have mastered the basics of HTML, CSS, and JavaScript, you can move on to more advanced topics. This section covers advanced topics such as responsive design, web accessibility, and performance optimization. By learning these advanced topics, you can create websites that are user-friendly, accessible, and fast.
An API (Application Programming Interface) is a set of rules and protocols that allow different software applications to communicate with each other. In this section, you will learn about some of the most common APIs used in web development, such as the DOM API, the Fetch API, and the Web Storage API. By learning how to use these APIs, you can create dynamic and interactive websites.