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HTML Cheat Sheet: how to implement tables, links, and more

HTML, or Hyper Text Markup Language, is essential for structuring web pages, working alongside CSS and JavaScript. A valid HTML document includes a root <html> tag, with <head> for metadata and <body> for content. Key elements include semantic tags like <header> and <footer> for improved accessibility, as well as formatting tags for text and links. Lists and tables are organized using <ol>, <ul>, and <table> elements, while performance can be enhanced with attributes like loading="lazy". Understanding these elements is crucial for effective web development and SEO.

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HTML (Hyper Text Markup Language) is the standard markup language for structuring web pages, used alongside CSS and JavaScript in modern front-end development. Every HTML document is built from elements with opening and closing tags, organized under a root <html> tag that contains a <head> and a <body>.

Learning outcomes

  • Page structure: A valid HTML document uses <!DOCTYPE html>, a root <html> tag, and two child elements, <head> and <body>, to define metadata and visible content respectively.

  • Semantic elements: Tags like <header>, <main>, <article>, and <footer> replace generic <div> containers to improve accessibility, SEO, and code maintainability.

  • Text formatting and links: Inline elements such as <strong>, <em>, <mark>, and <a> handle emphasis, highlighting, and navigation without breaking document flow.

  • Lists and tables: Ordered and unordered lists use <ol> and <ul> with <li> items, while tables should use <thead>, <tbody>, and scoped <th> elements for structure and accessibility.

  • Performance attributes: Adding loading="lazy" to images and iframes, and using <link rel="preload"> for critical assets, are practical ways to improve page load speed.

HTML stands for Hyper Text Markup Language. It is the standard markup language for creating web pages. It is used alongside technologies like Cascading Style Sheets (CSS) and JavaScript in modern web development.

Web developers use HTML all the time, so it’s important to be familiar with the common operations and elements. Today, we’ll offer a quick reference to HTML to speed up your learning and coding.

We’ll go over:

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