UI Fabric is a Component Library that is developed to reflect the latest Microsoft design language. It is used in many Microsoft web applications and is developed in the open:

What Makes It Good

Fabric has been developed BOTH by developers and design engineers working together as a team
Most notable Microsoft web products use it
It is documented both from examples and generated from API (TypeScript) itself
Components are highly customizable and themeable
Comprehensive library
Works with (aria) and augments (focus management) web accessibility standards
Fully funded and well managed - shield rotation and lots of automation work
Engineering is done in the open in github.com
Engineering system is shared and re-usable by other teams

How to Find It

github repo: https://github.com/officedev/office-ui-fabric-react

Documentation can be found here: https://developer.microsoft.com/en-us/fabric/#/components

How to Use It

Importing a Component

import { DefaultButton } from 'office-ui-fabric-react';

const MyComponent = () => {
  return (
    <div>
      <DefaultButton>Hello World</DefaultButton>
    </div>
  );
};

Customizing Behavior of Individual Component

Take a look at the documentation: https://developer.microsoft.com/en-us/fabric#/components/button

Let's say we want an Icon to be rendered with the Button Text, we'd use the iconProps

import { DefaultButton } from 'office-ui-fabric-react';

const MyComponent = () => {
  return (
    <div>
      <DefaultButton iconProps={{ iconName: 'Mail' }}>Send Mail</DefaultButton>
    </div>
  );
};

Render Props

Some Fabric components take in a render function like the TextField:

import { TextField } from 'office-ui-fabric-react';

const MyComponent = () => {
  return (
    <div>
      <TextField onRenderPrefix={() => <Icon iconName="Search" />} />
      <TextField onRenderPrefix={() => 'hello world'} />
    </div>
  );
};

Layout with Stack

Before we start, let's look at flexbox. It is really, really complex to use:

a guide: https://css-tricks.com/snippets/css/a-guide-to-flexbox/
a tool: http://the-echoplex.net/flexyboxes/
did you know there were 3 or so flex box standards? i.e. Old links will have non-working code

Fabric's answer is: Stack

A Stack is a container-type component that abstracts the implementation of a flexbox in order to define the layout of its children components.

The concepts are:

direction
grow
wrap
shrunk
justify-content
alignment

Stack abstracts these CSS and provides a type discoverable.

Checkout a cookbook of sorts in our documentation: https://developer.microsoft.com/en-us/fabric#/components/stack

Exercise

Open up the Documentation for DefaultButton
Open up the TSX files inside components/
Replace the DOM tags with Fabric components in those TSX files with these components:

Stack
DefaultButton
Checkbox
TextField
Pivot (for the filter)

Bonus Exercise

GO WILD! There are so many components from the Fabric library! Try to put some components in the exercise component files. Try out these concepts that we have mentioned above:

Importing components from office-ui-fabric-react
Customizing component with props found on the documentation site
Customize component with render props (these will be called onRender or something like that)