Design Systems with Styled System

The goal of this exercise is to learn how to style React applications in an idomatic way.

Prerequisites

You need to be comfortable writing React components and using Styled Components. This exercise assumes you understand the following concepts:

• Introduction to Thinking in React.
• Component based style in React.

You need to have node and npm installed on your computer.

Getting started

git clone git@github.com:reactgraphqlacademy/advanced-ui-styling.git
cd advanced-ui-styling
npm install
npm run storybook

Exercise

Part 1, Styled-Components and Storybook

Input component

Use styled-components to implement the style for the Input component defined in src/css-in-js/components/Input/index.

There should be three stories in src/css-in-js/components/Input/input.stories.js that show the following 3 styles.

1. The default Input style should be:

{
    padding: 5px;
}

2. The "error" style when Input receives the prop error={true}. The error style is the following:

{
    padding: 5px;
    border: 1px solid red;
}

3. The "disabled" style when Input receives the prop disabled={true}. The disabled style is the following:

{
    padding: 5px;
    border: 1px solid grey;
    background-color: grey;
}

4. What happens if we do this <Input error disabled />? What is the border color of the input? Should we improve that? How? Discuss with your peers.

Button component

Task 1. Using styled-components, implement some Bootstrap button styles in src/css-in-js/components/Form/Button using the styles defined in that file. Then create the following stories in src/css-in-js/components/button/button.stories.js:

1. Default, no props required.
2. Button primary when prop primary={true}
3. Button secondary when prop secondary={true}
4. Button large when prop large={true}
5. Button block when prop block={true}

Final questions:. The default <Button />(meaning no props) doesn't have a border.

• Why? Should we change the CSS? Discuss with your peers. Hint, what's the default style for the Bootstrap button?
• Would the following code snippet fix the problem?

Button.defaultProps = {
  secondary: true
};

Bonus exercise. Implement the the component and stories for the Bootstrap Alert component https://getbootstrap.com/docs/4.3/components/alerts/

Articles and links

• ReactJS article on Styling in React
• https://www.styled-components.com/
• https://github.com/css-modules/webpack-demo
• https://github.com/css-modules/css-modules/

License

This material is available for private, non-commercial use under the GPL version 3.