Animations: loading spinner

Centering: Card component

Variants: Button component

Delegated props

Props and TypeScript

Setup: files and shadows

Spot the a11y errors

Use Flexbox to create the layout without media queries

Scroll smoothly and adjust position for header

Link each item in the table of contents to the heading location in the blog post

Add a descriptive id for each heading

Make the table of contents sticky and responsive

Create a table of contents from the headings

Extract the headings from the MDX

Use Flexbox to create a responsive footer

Use Flexbox to create the layout

Why doesn't an object copy maintain its identity?

Why is `Math.random()` a bad value for the `key` prop?

Implicit returns aren't always implied

How exactly does && work in JSX?

Spot the a11y errors in this sign-in form

Access an object by a variable property