How to Add a Widget Under a Blog Post on Blogger. Blogger widgets, or "gadgets," allow you to customize your blog template by adding either pre-made applications or your own HTML, CSS or ...

HTML provides the structure, content and layout, CSS adds style and design, and JavaScript adds functionality and interactivity.

Wix automatically generates the HTML code for your site, and you can insert this code into a Blogger post so that your viewers can interact with your site directly on the blog.

These three programming languages are tools that you can use to create, design and style your very own website.

jsFiddle lets developers play with the three core elements of Web development. Check out this powerful application for rapid prototyping and testing.