HTML and CSS Reference
In Chapter 2 , Starting Your Project , I recommended using Sublime Text and Vim for
Web development. Both of these tools have inline validation that you can use to write
valid markup. Moreover, these tools also provide autocompletion of tags and ele-
ments that make writing valid markup trivial.
In the event of you not having access to these tools, I recommend using validat-
or.w3.org/ to validate your markup.
It is essential to have these tools automated for you to make sure you reduce any
issues with your site to the absolute minimum.