You need a solid knowledge of HTML because it’s the foundation of web content, and your skill in HTML5 will determine how well you can master the other technologies that work with it. Luckily for you, we have an HTML5 primer ready to go.
2. Cascading Style Sheets, Level 3 (CSS3)
CSS is used by a web developer to supply the visual look and feel of the website to the browser. The current practical standard is CSS Level 3. “Modules” carrying level 3 that are in the stable phase of development are worth learning. Many modules in “testing” are in the wild, too. One of the most important and recent is flexbox. While creating complex layouts in the past was difficult, flexbox set a new standard that all developers are moving to embrace.computer science computer science computer science computer science computer science