Layout and responsive · Lesson 9 of 14 · 7 minutes

Layout and responsive: Responsive images

A percentage width responds to the containing block; automatic height preserves aspect ratio.

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Your objectives

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1
Build responsive images
Build this first target: img with width: 100%. Keep the selector relationships intact and inspect the preview.
Hint & worked example
A percentage width responds to the containing block; automatic height preserves aspect ratio.
The requested selectors and declarations exist outside comments.
```
img { width: 100%; }
```
Common mistake to avoid: If the page fits one desktop viewport, no narrower viewport needs checking.
2
Extend the responsive images example
Extend your file to include: img with width: 100%; img with height: auto. Keep the selector relationships intact and inspect the preview.
Hint & worked example
A percentage width responds to the containing block; automatic height preserves aspect ratio.
The requested selectors and declarations exist outside comments.
```
img { width: 100%; }
img { height: auto; }
```
Common mistake to avoid: Hiding all overflow always makes content accessible.
3
Verify the complete responsive images pattern
Finish the pattern with: img with width: 100%; img with height: auto; img with max-width: 40rem. Keep the selector relationships intact and inspect the preview.
Hint & worked example
A percentage width responds to the containing block; automatic height preserves aspect ratio.
The requested selectors and declarations exist outside comments.
```
img { width: 100%; }
img { height: auto; }
img { max-width: 40rem; }
```
Common mistake to avoid: If the page fits one desktop viewport, no narrower viewport needs checking.

Understand the pattern

A percentage width responds to the containing block; automatic height preserves aspect ratio.

Misconceptions to reject

If the page fits one desktop viewport, no narrower viewport needs checking.
Hiding all overflow always makes content accessible.

The preview is a sanitized subset, not a full browser compatibility test.

Worked example and expected result

img { width: 100%; }
img { height: auto; }
img { max-width: 40rem; }

A percentage width responds to the containing block; automatic height preserves aspect ratio.

Try a variation

Adapt the final example to a different project name while retaining its structure and relationships. A different context still needs a real browser and accessibility check.

Explain it

Which statement correctly explains responsive images?Hiding all overflow always makes content accessible.A percentage width responds to the containing block; automatic height preserves aspect ratio.If the page fits one desktop viewport, no narrower viewport needs checking.

Apply it elsewhere

You reuse responsive images in a different project. What must still be verified?The resulting layout, focus behavior, and readability at the target viewport sizes.Nothing; passing a single exercise guarantees every future use.Only whether the source code has the same number of lines.

Keep the momentum.

Complete the lab, then explain and apply the pattern.

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