"Mozilla splash page" assessment

willjhnsn · January 22, 2018, 9:37pm

Hello, I’m currently doing the “Mozilla Splash page” assessment. I can get everything to work except for the part with the responsive images. Here’s a snippet of my HTML doc:

>     <a href="https://www.mozilla.org/en-US/firefox/new/">  
>           <img srcset="images/dino120.png 120w,
>                        images/dino400.png 400w"
>                sizes="(max-width: 480px) 120px,
>                       (min-width: 481px) 400px"
>                src="images/dino400.png" alt="a red dinosaur head">
>         </a>

Is there anything wrong with my code? I can’t see any differences whenever I resize my browser.

chrisdavidmills · January 22, 2018, 9:19pm

I’ve not looked at this stuff for a while, but your code looks pretty reasonable.

Try comparing your code to the finished version here:

https://mdn.github.io/learning-area/html/multimedia-and-embedding/mdn-splash-page-finished/

github.com

mdn/learning-area/blob/master/html/multimedia-and-embedding/mdn-splash-page-finished/index.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width">
    <title>Mozilla splash page</title>
    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700' rel='stylesheet' type='text/css'>
    <style>
      /* header and body setup */

      html {
        font-family: 'Open Sans', sans-serif;
        background: url(pattern.png);
      }

      body {
        width: 100%;
        max-width: 1200px;
        min-width: 360px;
        margin: 0 auto;

This file has been truncated. show original

One reason that might be causing a problem is that if you are using a very hi res screen, the browser might load up the larger image even at the narrow width, so that it start looks sharp, and not fuzzy.

rakibul · January 22, 2018, 9:19pm

Thank you!
In my laptop, everytime I get the 400px picture.

Toster · January 22, 2018, 9:20pm

Hi,

I am doing a Mozilla splash page assignment and it seems like scrset/sizes works well in Firefox browser: 120px icons are downloaded when the screen width is 480px or lower, and 400px icons otherwise.

But in Google Chrome dev tools it keeps downloading 400px icons no matter how small the screen width is. At least that is what I see on a Network tab.
I tried to check finished assignment on MDN Github and there is the same issue.
Is this about Google Chrome not supporting this attributes or something else?

Thank you!

P.S. Red panda image changes work just fine

P.S.S. Nevermind, I just checked StackOverflow. It seems like a Chrome feature. It recognizes that my resolution is higher than I want it to think. Funny moment, its own tool can’t fool the browser =) Even after clearing and disabling cache it keeps getting 400px images.
Wrapping in the <picture> element still works, though

chrisdavidmills · January 22, 2018, 9:20pm

Cool, you found the answer I was going to give you

Apologies got not being faster to respond, but I was on vacation for 2 weeks. Back now!

rgamoji · January 22, 2018, 9:21pm

Hi @chrismills ,

Below is the body of the html page for the assessment: https://developer.mozilla.org/en-US/docs/Learn/HTML/Multimedia_and_embedding/Mozilla_splash_page
I would appreciate if you can go through the file and let me know if it is correct.

<body>
<header>
  <h1>Mozilla</h1>
  <!-- insert <img> element, link to the small
      version of the Firefox logo -->
  <img src="firefox_logo-only_RGB_400.png" alt="Firefox Logo">

</header>

<main>
  <article>
    <!-- insert iframe from youtube -->

    <iframe width="560" height="315" src="https://www.youtube.com/embed/p85rO57cWKM" frameborder="0" allowfullscreen></iframe>
    <h2>Rocking the free web</h2>

    <p>Mozilla are a global community of technologists, thinkers, and builders, working together to keep the Internet alive and accessible, so people worldwide can be informed contributors and creators of the Web. We believe this act of human collaboration across an open platform is essential to individual growth and our collective future.</p>

    <p>Click on the images below to find more information about the cool stuff Mozilla does. <a href="https://www.flickr.com/photos/mathiasappel/21675551065/">Red panda picture</a> by Mathias Appel.</p>
  </article>

  <div class="further-info">
    <!-- insert images with srcsets and sizes -->
    <a href="https://www.mozilla.org/en-US/firefox/new/">
      <img srcset="firefox_logo-only_RGB_Original.png 1200w,
	       firefox_logo-only_RGB_400.png 400w,
	       firefox_logo-only_RGB_120.png 120w"
       sizes="(max-width: 480px) 120px,
	      400px"
           src="firefox_logo-only_RGB_Original.png"
       alt="Firefox Logo"
  >
    </a>
    <a href="https://www.mozilla.org/">
      <img
	srcset="mozilla-dinosaur-head_Original.png 1200w,
	        mozilla-dinosaur-head_400.png 400w,
	        mozilla-dinosaur-head_120.png 120w"
	sizes="(max-width: 480px) 120px,
	       400px"
	src="mozilla-dinosaur-head_Original.png"
            alt="Mozilla Logo"
      >
    </a>
    <a href="https://addons.mozilla.org/">
      <img
	srcset="firefox-addons_120.png 120w,
	        firefox-addons_400.png 400w"
	sizes="(max-width: 480px) 120px,
	       400px"
	src="firefox-addons_400.png"
	alt="Mozilla Add-Ons"
      >
    </a>
    <a href="https://developer.mozilla.org/en-US/">
      <img src="developer_mozilla_dinosar_head.svg" alt="Mozilla Developer Network Logo" >
    </a>
    <div class="clearfix"></div>
  </div>

  <div class="red-panda">
    <!-- insert picture element -->
<picture>
   <source media="(max-width: 600px)" srcset="red-panda-closeup.png">
   <source media="(min-width: 601px)" srcset="red-panda-1200.jpeg">
   <img src="red-panda-Original.jpg" alt="The beautiful red panda">
</picture>
  </div>

</main>

wacoloo35 · January 22, 2018, 9:21pm

HI, I’ve just finished the assement “Mozilla Spash Page” so I would like to somwone nice can give me the marking guide
PS: Sorry for my bad english

chrisdavidmills · January 22, 2018, 9:21pm

Hello!

No problem at all. The marking guide is here:

github.com

mdn/learning-area/blob/master/html/multimedia-and-embedding/mdn-splash-page-finished/marking-guide.md

# Marking guide for "Mozilla splash page"
The following article outlines a marking guide for the MDN Learning Area HTML Assessment — [Mozilla splash page](https://developer.mozilla.org/en-US/Learn/HTML/Multimedia_and_embedding/Mozilla_splash_page). Each subtask detailed in the assessment is listed below, along with an explanation of how many marks the task is worth, and the mark breakdown.

Note: These are guidelines, not set in stone rules — you are of course free to use your judgement on mark awarding when you meet an edge case, or something that isn't clearly cut.

The overall mark awarded is out of 28. Work out their final mark, and then divide by 28 and multiply by 100 to give a percentage mark. For reference, you can find a [finished splash page](index.html) that would be awarded top marks.

## Preparing images

<dl>
<dt>A total of 6 marks should be awarded for this section</dt>
<ul>
  <li>1 for creating the 400px and 120px version of the Firefox logo.</li>
  <li>1 for creating the 400px and 120px version of the Addons image.</li>
  <li>1 for creating the 400px and 120px version of the Dinosaur logo.</li>
  <li>1 for leaving the MDN logo SVG as it is.</li>
  <li>1 for creating the 1200px and 600px version of the Red Panda image, but only if the former is landscape, and the latter is portrait and shows the panda close up.</li>
  <li>1 for optimizing them so they are nice and compact.</li>
  </ul>
</dd>

This file has been truncated. show original

And the finished example code can be found here:

github.com

mdn/learning-area/blob/master/html/multimedia-and-embedding/mdn-splash-page-finished/index.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width">
    <title>Mozilla splash page</title>
    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700' rel='stylesheet' type='text/css'>
    <style>
      /* header and body setup */

      html {
        font-family: 'Open Sans', sans-serif;
        background: url(pattern.png);
      }

      body {
        width: 100%;
        max-width: 1200px;
        min-width: 360px;
        margin: 0 auto;

This file has been truncated. show original

Let me know if you need any more help.

Thanks!

jswisher · January 22, 2018, 10:36pm

2 posts were merged into an existing topic: “Adding features to our bouncing balls demo” assessment

jswisher · January 22, 2018, 11:24pm

4 posts were split to a new topic: HTML validator error message

jswisher · January 22, 2018, 10:36pm

4 posts were merged into an existing topic: “Adding features to our bouncing balls demo” assessment

jswisher · January 22, 2018, 10:37pm

4 posts were merged into an existing topic: “Adding features to our bouncing balls demo” assessment

ciprian.danila · January 22, 2018, 9:21pm

Hello. Just finished “Mozilla splash page” assessment. Here is the link: https://cipdanila.github.io/splash-page/. Any suggestion, especially regarding the mobile version of my site? Thank you!

chrisdavidmills · January 22, 2018, 9:21pm

This looks pretty good to me, having compared it to our finished version: https://mdn.github.io/learning-area/html/multimedia-and-embedding/mdn-splash-page-finished/

If you want to check it out further, I’d recommend comparing your source code to our source code: https://github.com/mdn/learning-area/blob/master/html/multimedia-and-embedding/mdn-splash-page-finished/index.html

You can also find the marking guide here: https://github.com/mdn/learning-area/blob/master/html/multimedia-and-embedding/mdn-splash-page-finished/marking-guide.md

Let me know if you have any specific questions about it.

Best regards.

jswisher · January 22, 2018, 10:07pm

2 posts were merged into an existing topic: “Typesetting a community school home page” assessment

jswisher · January 22, 2018, 10:24pm

4 posts were merged into an existing topic: “Silly story generator” assessment

jswisher · January 22, 2018, 10:38pm

A post was merged into an existing topic: “Adding features to our bouncing balls demo” assessment

jswisher · January 22, 2018, 11:25pm

A post was merged into an existing topic: “Image gallery” assessment

jswisher · January 22, 2018, 11:27pm

8 posts were split to a new topic: Array module active learning “Printing those products!”

jswisher · January 22, 2018, 9:44pm

2 posts were split to a new topic: Multiple HTML assessments