HTML (HyperText Markup Language) is the standard markup language for creating web pages. It provides the structure and content of websites by using a system of tags and elements.
Key features of HTML:
CSS (Cascading Style Sheets) is used to style and layout web pages. It allows you to control colors, fonts, spacing, and positioning of elements on a page.
CSS can be applied in three ways:
Inline - directly in HTML elementsInternal - using <style> tags in the document headExternal - linking to separate CSS filesJavaScript is a programming language that enables interactive web pages. It can update content, control multimedia, animate images, and much more.
This expand/collapse widget demonstrates:
classListonclickWhen building web applications, follow these best practices: