Layout and responsive · Lesson 7 of 14 · 7 minutes

Layout and responsive: Intrinsic sizing

A flexible image can use its natural ratio while fitting its container.

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Your objectives

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1
Build intrinsic sizing
Build this first target: img with max-width: 100%. Keep the selector relationships intact and inspect the preview.
Hint & worked example
A flexible image can use its natural ratio while fitting its container.
The requested selectors and declarations exist outside comments.
```
img { max-width: 100%; }
```
Common mistake to avoid: If the page fits one desktop viewport, no narrower viewport needs checking.
2
Extend the intrinsic sizing example
Extend your file to include: img with max-width: 100%; img with height: auto. Keep the selector relationships intact and inspect the preview.
Hint & worked example
A flexible image can use its natural ratio while fitting its container.
The requested selectors and declarations exist outside comments.
```
img { max-width: 100%; }
img { height: auto; }
```
Common mistake to avoid: Hiding all overflow always makes content accessible.
3
Verify the complete intrinsic sizing pattern
Finish the pattern with: img with max-width: 100%; img with height: auto; img with display: block. Keep the selector relationships intact and inspect the preview.
Hint & worked example
A flexible image can use its natural ratio while fitting its container.
The requested selectors and declarations exist outside comments.
```
img { max-width: 100%; }
img { height: auto; }
img { display: block; }
```
Common mistake to avoid: If the page fits one desktop viewport, no narrower viewport needs checking.

Understand the pattern

A flexible image can use its natural ratio while fitting its container.

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 { max-width: 100%; }
img { height: auto; }
img { display: block; }

A flexible image can use its natural ratio while fitting its container.

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 intrinsic sizing?A flexible image can use its natural ratio while fitting its container.If the page fits one desktop viewport, no narrower viewport needs checking.Hiding all overflow always makes content accessible.

Apply it elsewhere

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

Keep the momentum.

Complete the lab, then explain and apply the pattern.

Next: Layout and responsive: Content-width constraints Try an incident drill

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