HTML or HyperText Markup Language tells the web browser what each part of a website is, while CSS or Cascading Style Sheets helps give the web pages their look and formatting.

Using an HTML tag to define CSS information is referred to as an inline style. The fact that style rules dictate that parent-level styles are overridden by page-level styles and page-level styles are ...

CSS: Enter CSS to be applied to the HTML used in your tests. It is placed between <style> elements in the header portion of the page. HTML: This area allows you to enter HTML to be used in your tests.

How to Set Margins on Web Pages. Cascading Style Sheets allow you enhance the appearance of your company's website by surrounding content within boxes or containers of empty gaps or whitespace.

While HTML, CSS and JavaScript are powerful tools, they tend to run out of steam with development of advanced web applications that store data on the client side and manage complex state transitions.