xoxo-multiplayer-frontend's Introduction

Typescript notes

Object type

object is a type that represents the non-primitive type, i.e. any thing that is not number, string, boolean, symbol, null, or undefined.

  declare function create(o: object | null): void;

  create({ prop: 0 }); // OK
  create(null); // OK

  create(42); // Error
  create("string"); // Error
  create(false); // Error
  create(undefined); // Error

ICE Candidate

The RTCIceCandidate interface—part of the WebRTC API represents a candidate Internet Connectivity Establishment (ICE) configuration which may be used to establish an RTCPeerConnection.
An ICE candidate describes the protocols and routing needed for WebRTC to be able to communicate with a remote device. - When starting a WebRTC peer connection, typically a number of candidates are proposed by each end of the connection, until they mutually agree upon one which describes the connection they decide will be best.
WebRTC then uses that candidate's details to initiate the connection.

Exchanging ICE candidates

After exchanging an offer and answer, the two peers start exchanging ICE candidates to negotiate the actual connection between them.
Every ICE candidate describes a method that the sending peer is able to use to communicate.
Each peer sends candidates in the order they're discovered, and keeps sending candidates until it runs out of suggestions, even if media has already started streaming.
Once the two peers agree upon a mutually-compatible candidate, that candidate's SDP is used by each peer to construct and open a connection, through which media then begins to flow.
If they later agree on a better (usually higher-performance) candidate, the stream may change formats as needed.

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