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Solution
Submitted over 2 years ago

Frontend Mentor - QR code component solution

Joseph Akayesi•30
@josephakayesi
A solution to the QR code component challenge
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Community feedback

  • Melvin Aguilar 🧑🏻‍💻•61,020
    @MelvinAguilar
    Posted over 2 years ago

    Hi there 👋. Good job on completing the challenge ! I have some feedback for you if you want to improve your code.

    HTML:

    • Use the <main> tag to wrap all the main content of the page instead of the <div> tag. With this semantic element you can improve the accessibility of your page.
    • You must use a level-one heading (h1) even though this is not a full-page challenge. You can create an '<h1>' element within your 'main' element that will be hidden visually but visible and readable by screen readers. The class "sr-only" hides content visually and here are the styles to copy. e.g.: <h1 class="sr-only">QR Card Component</h1>
    • Since this component involves scanning the QR code, the image is not a decoration, so it must have an alt attribute. The alt attribute should explain its purpose. e.g. QR code to frontendmentor.io

    CSS:

    • Instead of using pixels in font-size, use relative units like em or rem. The font-size in absolute units like pixels does not scale with the user's browser settings. This can cause accessibility issues for users who have set their browser to use a larger font size. You can read more about this here.
    • Centering an element with position: absolute would make your element behave strangely on some screen sizes, "there's a chance the content will grow to overflow the parent". You can use Flexbox or Grid to center your element. You can read more about centering in CSS here.
    .container {
        /*width: 100vw;*/
        /*height: 100vh;*/
        min-height: 100vh;
        display: grid;
        place-content: center;
    } 
    
    .qrcode-card {
        /* margin: auto; */
        /* position: relative; */
        /* top: 50%; */
        /* transform: translateY(-50%); */
       . . .
    }
    
    .qrcode-image {
        width: 100%;
        /* height: 100%; */ /* Use this property when there is a containing div with a defined height, otherwise it will take the full height of the component */
        border-radius: 5%;
    }
    

    I hope you find it useful! 😄 Above all, the solution you submitted is great!

    Happy coding!

    Marked as helpful

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How does the accessibility report work?

When a solution is submitted, we use axe-core to run an automated audit of your code.

This picks out common accessibility issues like not using semantic HTML and not having proper heading hierarchies, among others.

This automated audit is fairly surface level, so we encourage to you review the project and code in more detail with accessibility best practices in mind.

How does the CSS report work?

When a solution is submitted, we use stylelint to run an automated check on the CSS code.

We've added some of our own linting rules based on recommended best practices. These rules are prefixed with frontend-mentor/ which you'll see at the top of each issue in the report.

The report will audit all CSS, SCSS and Less files in your repository.

How does the HTML validation report work?

When a solution is submitted, we use html-validate to run an automated check on the HTML code.

The report picks out common HTML issues such as not using headings within section elements and incorrect nesting of elements, among others.

Note that the report can pick up “invalid” attributes, which some frameworks automatically add to the HTML. These attributes are crucial for how the frameworks function, although they’re technically not valid HTML. As such, some projects can show up with many HTML validation errors, which are benign and are a necessary part of the framework.

How does the JavaScript validation report work?

When a solution is submitted, we use eslint to run an automated check on the JavaScript code.

The report picks out common JavaScript issues such as not using semicolons and using var instead of let or const, among others.

The report will audit all JS and JSX files in your repository. We currently do not support Typescript or other frontend frameworks.

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