Louis DeScioli lourd

When Babel 6 came out, it was hard for a lot of packages to upgrade because it was essentially an entirely different category of thing than Babel 5. So what happened was that some packages upgraded, and some didn't — at least not straight away.

Some projects took the prima facie enlightened view that packages should expose untranspiled code, so that the consumers of that code could determine for themselves what needed to get transpiled based on the environments they supported.

That was a costly decision. If I was the author of an app that was using Babel 6, I couldn't import a library that was still using Babel 5 and shipping untranspiled code (because the configs were completely incompatible), and vice versa. Frankly, it was a bloody nuisance. We are bad at anticipating these sorts of issues. It will happen again at some point.

Adding a few extra bytes to pkg.main or pkg.module is a small price to pay for things just working. As well as avoiding the aforementioned headaches, it means that your

A timeline of the last four years of detecting good old window.localStorage.

Jan Lenhart, bless his heart contributed the first patch for support:

October 2009: 5059daa

From Meteor's documentation:

In Meteor, your server code runs in a single thread per request, not in the asynchronous callback style typical of Node. We find the linear execution model a better fit for the typical server code in a Meteor application.

This guide serves as a mini-tour of tools, trix and patterns that can be used to run async code in Meteor.

Basic async

Sometimes we need to run async code in Meteor.methods. For this we create a Future to block until the async code has finished. This pattern can be seen all over Meteor's own codebase:

	import React from 'react';
	import {Model} from 'react-vr';

	function getFormat(formats, format) {
	for (let i = 0; i < formats.length; i++) {
	if (formats[i].formatType === format) {
	return formats[i];
	}
	}
	}

	import csv, time
	from selenium import webdriver
	from selenium.webdriver.support.ui import Select
	from selenium.webdriver.common.keys import Keys

	applicant_name = # your name
	applicant_email = # your email
	applicant_address = # your physical address
	occupation = # your occupation

	// getComponent is a function that returns a promise for a component
	// It will not be called until the first mount
	function asyncComponent(getComponent) {
	return class AsyncComponent extends React.Component {
	static Component = null;
	state = { Component: AsyncComponent.Component };

	componentWillMount() {
	if (!this.state.Component) {
	getComponent().then(Component => {