Web Platform

Polyfills

a polyfill is code that implements a new standard feature of a deployment environment within an old version of that environment that does not natively support the feature

  • coined by Remy Sharp, based on multipurpose filling paste brand, but it mainly means to fill in holes in functionality in many ways.

HTML Spec. And Stuff.

Reading

  • HTML5 Specification

  • html dog

  • The WHATWG works on a number of technologies that are fundamental parts of the web platform. They are organised somewhat arbitrarily based on the preferences of those editing the standard for those technologies.

  • This specification defines a big part of the web platform, in lots of detail. Its place in the web platform specification stack relative to other specifications can be best summed up as follows.

![](../assets/images/kitchensink.png)❌

EMBEDDED CONTENT

iframe element

  • An inline frame, or nested browsing context – essentially, a web page embedded within a web page.