A DIY guide to build your own React

This repository goes together with a series of posts that explains how to build React from scratch step by step.

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Didact's goal is to make React internals easier to understand by providing a simpler implementation of the same API and step-by-step instructions on how to build it. Once you understand how React works on the inside, using it will be easier.

🚧 Don't use this for production code!

Install it with npm or yarn:

$ yarn add didact

And then use it like you use React:

/** @jsx Didact.createElement */
import Didact from "didact";

class HelloMessage extends Didact.Component {
  constructor(props) {
    super(props);
    this.state = {
      count: 1
    };
  }

  handleClick() {
    this.setState({
      count: this.state.count + 1
    });
  }

  render() {
    const name = this.props.name;
    const times = this.state.count;
    return (
      <div onClick={e => this.handleClick()}>
        Hello {name + "!".repeat(times)}
      </div>
    );
  }
}

Didact.render(
  <HelloMessage name="John" />,
  document.getElementById("container")
);

hello-world
hello-world-jsx
todomvc
incremental-rendering-demo

The MIT License (MIT)

Copyright (c) Rodrigo Pombo

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.