1. Rebeccapurple color

    The new color added in CSS Color Module Level 4

  2. #rrggbbaa hex color notation

    The CSS Color Module Level 4 defines new 4 & 8 character hex notation for color to include the opacity level.

  3. CSS Subgrid

    Feature of the CSS Grid Layout Module Level 2 that allows a grid-item with its own grid to align in one or both dimensions with its parent grid.

  4. ECMAScript 2015 (ES6)

    Support for the ECMAScript 2015 specification. Features include Promises, Modules, Classes, Template Literals, Arrow Functions, Let and Const, Default Parameters, Generators, Destructuring Assignment, Rest & Spread, Map/Set & WeakMap/WeakSet and many more.

  5. JavaScript modules via script tag

    Loading JavaScript module scripts (aka ES6 modules) using `<script type="module">` Includes support for the `nomodule` attribute.

  6. JavaScript modules: dynamic import()

    Loading JavaScript modules dynamically using the import() syntax

  7. CSS Flexible Box Layout Module

    Method of positioning elements in horizontal or vertical stacks. Support includes all properties prefixed with `flex`, as well as `display: flex`, `display: inline-flex`, `align-content`, `align-items`, `align-self`, `justify-content` and `order`.

  8. CSS Font Loading

    This CSS module defines a scripting interface to font faces in CSS, allowing font faces to be easily created and loaded from script. It also provides methods to track the loading status of an individual font, or of all the fonts on an entire page.

  9. Resource Hints: modulepreload

    Using `<link rel="modulepreload">`, browsers can be informed to prefetch module scripts without having to execute them, allowing fine-grained control over when and how module resources are loaded.

  10. gpudevice api: createshadermodule

  11. gpushadermodule api

  12. gpushadermodule api: getcompilationinfo

  13. gpushadermodule api: label

  14. htmlscriptelement api: nomodule

  15. serviceworker api: support for ecmascript modules

  16. sharedworker api: `sharedworker()` constructor: support for ecmascript modules

  17. worker api: `worker()` constructor: support for ecmascript modules

  18. worklet api: addmodule

  19. worklet api: support for ecmascript modules

  20. css property: font-variant: css fonts module level 3 shorthand

  21. html element: link: rel: rel=modulepreload

  22. html element: link: rel: rel=modulepreload: `as=json`

  23. html element: link: rel: rel=modulepreload: `as=script`

  24. html element: link: rel: rel=modulepreload: `as=style`

  25. html element: script: nomodule

  26. html element: script: type: `type="module"`

  27. html element: script: type: `type="module"`: loading is retriable (http errors are not cached)

  28. javascript operator: await: use at module top level

  29. javascript statement: export: arbitrary module namespace identifier names

  30. javascript statement: import: arbitrary module namespace identifier names

  31. javascript statement: import: `import source`: source phase import of wasm modules

  32. svg element: script: type: `type='module'`

  33. api: module

  34. api: module: `customsections()` static method

  35. api: module: `exports()` static method

  36. api: module: `imports()` static method

  37. api: module: `module()` constructor

  38. api: module: `module()` constructor: `compileoptions` parameter

  39. ecmascript 2022 (es13)