MDN HTML
The HTML reference section contains links to tutorials, an element reference section, and basic information. This resource page would be helpful for anyone looking for ways to code as an information source. It is also helpful for grabbing bits of code from the reference section to try in your own coding. This page offers a wide array of coding techniques. It will also stay current with the most up to date coding formats.
MDN CSS
The CSS reference page is a huge set of resources. It includes tutorials, reference section, a cookbook, and links to demos. This resource can help with issues one might have when styling their own site. The demos can help to show how a specific selector will behave griven a specific property and value in a rule. The cook book has a set of ideas on how to style different elements. It uses a recipe format and allows you to grab bit of code as well as showing an example of how the code will look in a final product.
Summary
Resource materials such ase these are imperitive for any developer. With today's technology, things are changing so quickly that it would be nearly impossible to know all the code all the time. When new pieces of code come out or new ways of problem solving code it is nice to have a trusted resource to show the most up to date ways of coding a particular element on a page and how to style it properly. This resource is developed through the collaboration of the web development community. Because of this it is is a responsive dynamic site that will keep current with the most up to date solutions. It is important to have a trusted site that houses the current formats for coding and styling solutions.