Some files in this directory are generated. Please do not edit them. This specifically includes:

• idl/*
• mdn.json

Feel free to send a pull request with changes to any other files. Note It is recommended to add your patch use KDL format, continue reading to find out more.

The patches/ directory contains .kdl files that specify modifications ("patches") on top of the Web IDL from web specifications, using the KDL format. These patches are applied by patches.ts.

• Add extra types to the generated types, e.g. type parameters.
• Make types more strict, e.g. replacing a string type into a string literal type.
• Remove features that are not widely supported by web browsers, in case it's not automatically removed.

• When the type is incorrect, and that's from an upstream spec. It's recommended to file a bug in the corresponding spec, and when the fix happens, it will be applied here automatically.

• Try to add a new patch file when the newly desired patch is big, e.g. as long as a whole page. If it's just a few lines then it can usually go into one of the existing files.
• Files are named per their originating web specification. https://respec.org/xref/ helps you search the specifications. If there's no existing patch with that name, you should add one even if the patch will be very small.
• Please add code comment about the intent for the patch, e.g. a feature is removed as it's only implemented in one browser.
• You can largely follow the Web IDL structure but in KDL syntax:
  • Most top level types e.g. enum, interface, or dictionary have the same names, but multi-word names like interface mixin are hyphened as interface-mixin.
  • Attributes and operations are called property and method respectively to follow TypeScript convention.
• If in doubt, feel free to file an issue or request help in Discord dom-lib-generator channel.

interface-mixin GlobalEventHandlers {
  // Touch event handlers are intentionally hidden in non-mobile web browsers.
  // See w3c.github.io/touch-events#dfn-expose-legacy-touch-event-apis.
  property ontouchcancel optional=#true
  property ontouchend optional=#true
  property ontouchmove optional=#true
  property ontouchstart optional=#true
}