Great tutorial!

Some example could be more careful about mutating state. For example, https://github.com/kay-is/react-from-zero/blob/master/10-example-app.html#L93 updates this.state tasks directly. A better approach would be to clone the array before mutating. (It doesn't matter in this particular example, but a tutorial should follow best practices.)

Similarly, https://github.com/kay-is/react-from-zero/blob/master/10-example-app.html#L93 changes the props directly, which is a big no-no with React.

I may be wrong though. I'm not a React expert, after all I'm reading a tutorial on React.

Preview link for lesson 11 is broken

Saw that this repository somehow ended up as one of the most popular courses on Github (based on stars, lol)

Anyway, the current version of React is 16.3.1 and this course is based on 15.4.2 Some things have changed and need to be adressed. (PropTypes, context, lifecycle methods, etc. pp.)

Also, maybe this course could use some updates in general.

So what steps need to be taken?

1. Someone needs to check what changed since 15.4.2
2. Someone needs to write PRs to adress these changes

I'm using a rather old version of Babel to enable in-browser compilation of JSX, we probably need to check if this will still work with the new React version.

If someone is interested in this, just go for it.

It would be cool to have an example of componentDidUpdate or componentWillReceiveProps. E.g. when you make an Ajax request in componentDidMount and need to re-fetch the data because the props have changed (a personal pet peeve of mine).

The source of lesson 10 Example App doesn't match to the preview link. The preview link is of a simple Todo App while the code seems of a Timer App.

Content-wise, I think this repo is a pretty good intro to React, but I think adding links would make it easier for new React developers to digest the content.

The first 9 lessons currently only use one digit for their numbering, so the filenames are not sorted numerically as a result:

0-object-elements.html
1-element-factory.html
10-example-app.html
...
16-advanced-integration.html
2-jsx.html
3-nested-elements.html

Might be nice to give them two-digit numbers so everything sorts cleanly: 01, 02, 03, ... 10, 11, 12

https://github.com/chinanf-boy/react-from-zero

While updating to React 16 I saw that some new lessons could be nice.

Styling is only implicitly touched.

Context wasn't a public API until version 16, but now it is.

Some patterns could be nice. Things like Dependency Injection, Higher Order Components and Render Props.

Correct me if i'm wrong. I very well could be, since I'm starting from zero. This tutorial seems like more of a reference for implementing the individual techniques used in creating an app with react, rather than a tutorial 'from zero'. Shouldn't there be an explicit overview of the structure? To elucidate what I mean by structure, take, for instance, this question: where do i put these examples in a new instance of create-react-app / App.js ?

For reference ´App.js´:

import React, { Component } from 'react';
import logo from './logo.svg';
import './App.css';

class App extends Component {
  render() {
    return (
      <div className="App">
        <header className="App-header">
          <img src={logo} className="App-logo" alt="logo" />
          <h1 className="App-title">Welcome to React</h1>
        </header>
        <p className="App-intro">
          To get started, edit <code>src/App.js</code> and save to reload.
      </div>
    );
  }
}

export default App;