/css-for-js-mini-component-library

Primary LanguageJavaScript

Component Library Workshop

In this workshop, we'll build 3 components from scratch:

  1. ProgressBar
  2. Select
  3. IconInput

Most of the pertinent information will be stored in the Figma document (https://www.figma.com/file/u0wCdLXheiN9f2FmAuPsE9/Mini-Component-Library), but this README will contain some additional information to help you on your mission!

Two fully-formed components have already been included, to be used as-needed in your work:

  • Icon, an icon component that uses react-feather to render various icons
  • VisuallyHidden, a component that allows us to make text available to screen-reader users, but not to sighted users.

Additionally, all of the colors you'll need are indexed in constants.js.

All components in this project use the Roboto font. This font is already included in the Storybook environment, and is already applied to all elements. It comes in two weights:

  • 400 (default)
  • 700 (bold)

Running Storybook

This project uses Storybook, a component development tool.

First, install dependencies with npm install.

Once dependencies are installed, you can start storybook by running:

npm run start

Once running, you can visit storybook at http://localhost:6006.

Troubleshooting

You may get an error when running the start script that looks like this:

Error: error:0308010C:digital envelope routines::unsupported
    at new Hash (node:internal/crypto/hash:67:19)
    at Object.createHash (node:crypto:130:10)

You can fix this issue either by downgrading to Node 16, or by updating the package.json file as follows:

  "scripts": {
-   "start": "start-storybook -p 6006 -s public",
+   "start": "NODE_OPTIONS=--openssl-legacy-provider start-storybook -p 6006 -s public",
  },

For more info, check out the Troubleshooting Guide on the course platform.

The Components

ProgressBar

The figma document mentions that this component should be "accessible". You can learn how to build a semantically-valid, accessible progress-bar component by reading this doc: https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/ARIA_Techniques/Using_the_progressbar_role

This component uses a box shadow. We haven't seen this property yet! For now, you can achieve this effect by copying the following CSS declaration into your component:

box-shadow: inset 0px 2px 4px ${COLORS.transparentGray35};

We'll learn much more about the box-shadow property in future modules =)

Select

The Select component will need a down-arrow icon! You can use the chevron-down ID with the Icon component.

We want to use a native <select> tag in this component, so a bit of precursory HTML has been provided.

This component also includes a function, getDisplayedValue. This component uses some React APIs to work out the text that should be displayed. The value isn't currently used, but you can make use of it if needed, depending on your implementation.

NOTE: Hiding the built-in chevron

The <select> tag has a built-in chevron (downward-pointing character), but it's inconsistent between browsers. We want to use the provided “chevron-down” icon. But how do we replace the default built-in one??

This is something we haven't learned how to do, and so you'll need to do some googling + experimentation. I want you to get a bit of practice trying to tackle “unconventional” challenges like this!

If you get stuck and/or would like a hint, you'll find one on the solution page: https://courses.joshwcomeau.com/css-for-js/03-components/19-workshop-select#select

IconInput

This component also uses the Icon component — the specific ID will be provided as a prop.

This component requires bold text. You can achieve this look by using font-weight: 700.