Tell me why this works?

HTML-CSS
1

Tell us what’s happening:
I want to know why the posted “official” solution didn’t work, but my solution does.

official campbot solution.

<style>
.responsive-img {
  max-width: 100%;
  display: block;
  height: auto;
}

img {
  width: 600px;
}
</style>

Your code so far
vs my code


<style>
.responsive-img {
img {
  max-width: 100%;
  height: auto;
}
}

img {
max-width: 100%;
width: 600px;
}
</style>

<img class="responsive-img" src="https://s3.amazonaws.com/freecodecamp/FCCStickerPack.jpg" alt="freeCodeCamp stickers set">
<img src="https://s3.amazonaws.com/freecodecamp/FCCStickerPack.jpg" alt="freeCodeCamp stickers set">

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.116 Safari/537.36 OPR/67.0.3575.105.

Challenge: Make an Image Responsive

Link to the challenge:

2

I’ve tried both and got quite different results. While first code passed tests, second one didn’t…

3

The example problem asks you to only add rules to “responsive-img”. Your code won’t work given you nested an extra “img” inside “responsive-img”.
<.responsive-img { max-withd: 100px; height: auto; } img {width: 600px;>
The added: ‘display:center’ isn’t spoken in the example but implied.