Gozala

class Model {
  constructor(isShiftPressed=false, marker=null, selection=null) {
    this.isShiftPressed = isShiftPressed
    this.marker = marker
    this.selection = selection
    this.tasks = []
  }
  clone() {
    const instance = new this.constructor()
    Object.keys(this).forEach(key => instance[key] = this[key])

Gozala

/**
 * @template T, X, A
 * @typedef {import('./protocol').Process<T, X, A>} Process
 */

/**
 * @template X, T
 * @typedef {import('./protocol').Task<X, T>} Task
 */

Gozala

interface CID {
  code: number
  version: number
  multihash: Uint8Array
  bytes: Uint8Array
}

type Future<T> =
  | T
  | Promise<T>

Gozala

This is illustrating issue with vscode

Gozala

use async_std::task;
use juniper::{EmptyMutation, RootNode};

struct Concrete;

enum CustomName {
  Concrete(Concrete),
}

#[juniper::graphql_object]

Gozala

type Tag {
  id:ID
  name: String! @fake(type:word)
}

type InlineLink {
  id:ID
  to:Resource!
  name:String @examples(values: ["automerge", "pushpin", "local-first", "farm"])
  description:String @fake(type:words)

Gozala

WTF Flow

[Flow][] static type checker is a wonderful attempt to bring [algebric data types][] to JS. It is still fairly new project and there for has few WTFs that can pull you down the rabbit hole. This document is attempt to document things that may seem like a WTF from the perspective of JS developer who tries to employ static type checker, or in other words, some items on the list may be very subjective & based on the background of the writer.

Polymorphic type that is a function

It is very likely that one will wind up using [Polymorphic functions][] to solve a more general problem. And if you define type alias for such a function you may be puzzled what is the right syntax should be used for such type definition.

Let's start with:

Gozala

type DocID<a> = string
type Doc<a> = a

interface RepoService {
  keys: KeyService

  create<a>(doc: Doc<a>): Promise<DocID<a>>
  read<a>(id: DocID<a>): Promise<a>
  change<a>(id: DocID<a>, change: (doc: a) => void): Promise<void>
  watch<a>(id: DocID<a>): AsyncIterator<a>

Gozala

Function.prototype.runOnBackgroundThread = function (aCallback) {
  var _blob = new Blob(['onmessage = '+this.toString()],{"type":"text/javascript"});
  var _worker = new Worker((webkitURL.createObjectURL || URL.createObjectURL)(_blob));
  _worker.onmessage = aCallback;
  _worker.postMessage();
}

var _test = function () {
  postMessage((1+1).toString());
}

Gozala

// Security Error: Content at about:srcdoc may not load or link to resource://jid1-pss5nuwzdn1n3a-at-jetpack/signals/data/index.html.

let XUL_NS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
let HTML_NS = "http://www.w3.org/1999/xhtml";

let toolbar = document.createElementNS(XUL_NS, "toolbar");
toolbar.setAttribute("collapsed", false);
toolbar.setAttribute("style", "height: 80px;");

let toolbox = document.getElementById("navigator-toolbox");