Frontend Mentor | QR Code coding challenge solution

@Islandstone89

Posted 4 months ago

HTML:

Every webpage needs a <main> that wraps all of the content, except for <header> and footer>. This is vital for accessibility, as it helps screen readers identify a page's "main" section. Change .container into a <main>.
The image has meaning, so it must have proper alt text. Write something short and descriptive, without including words like "image" or "photo". Screen readers start announcing images with "image", so an alt text of "image of qr code" would be read like this: "image, image of qr code". The alt text must also say where it leads(frontendmentor website). A good alt text would be "QR code leading to the Frontend Mentor website."
Headings should always be in order, so you never start with a <h3>. A card heading would probably not be the main heading on a page, so make it a <h2> instead of a <h1>.

CSS:

Including a CSS Reset at the top is good practice.
I like to add 1rem of padding on the body, to ensure the card doesn't touch the edges on small screens.
You don't need font-style and font-optical-sizing, as the values you declare are the default.
Move the properties on .container to .box. Remove position, top, left and transform - they are not ideal for creating a layout.
To center the card horizontally and vertically, I would instead use Flexbox on the body:

display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
min-height: 100svh;

Remove the width on the card - setting fixed sizes in px is not recommended, as our components should stretch and shrink according to the screen it's viewed on.
That being said, we don't want the card to stretch indefinitely. Add a max-width of around 20rem on the card, to prevent it from getting too wide on larger screens.
font-size must never be in px. This is a big accessibility issue, as it prevents the font size from scaling with the user's default setting in the browser. Use rem instead.
On the image, add display: block and change width to max-width: 100% - the max-width prevents it from overflowing its container.

QR Code