MDN Web Docs

Getting started with WebGL

WebGL enables web content to use an API based on OpenGL ES 2.0 to perform 2D and 3D rendering in an HTML canvas in browsers that support it without the use of plug-ins.

CSS

CSS Container Queries

Container queries enable you to apply styles to an element based on the size of the element’s container. If, for example, a container has less space available in the surrounding context, you can hide certain elements or use smaller fonts.
Container queries are an alternative to media queries, which apply styles to elements based on viewport size or other device characteristics.

Web APIs

Performance API

The Performance API is a group of standards used to measure the performance of web applications.

CSS

font-palette

The font-palette CSS property allows specifying one of the many palettes contained in a font that a user agent should use for the font. Users can also override the values in a palette or create a new palette by using the @font-palette-values at-rule.