Useful tools can make your everyday work significantly easier. For Web development in particular, you can choose from a whole smorgasbord of browser extensions and online offerings. The most important of these tools and helpers are listed in this chapter.
HTML Validator and CSS Validator
Web standards provide a common set of practices for hardware, software, and Web sites to follow when they come together to deliver Web content. Only if clients (the software for Web access) and the Web sites both adhere to these standards, as closely as possible, is there any chance that Web pages will appear to users as the designer intended. Some clients are error tolerant and can guess roughly what the designer intended even in cases of serious markup ...