Layout and responsive · Lesson 13 of 14 · 7 minutes

Layout and responsive: Overflow prevention

Shrinkable tracks and wrapping text solve causes of overflow without hiding inaccessible content.

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Your objectives

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1
Build overflow prevention
Build this first target: .layout with display: grid, grid-template-columns: minmax(0,1fr). Keep the selector relationships intact and inspect the preview.
Hint & worked example
Shrinkable tracks and wrapping text solve causes of overflow without hiding inaccessible content.
The requested selectors and declarations exist outside comments.
```
.layout { display: grid; grid-template-columns: minmax(0, 1fr); }
```
Common mistake to avoid: If the page fits one desktop viewport, no narrower viewport needs checking.
2
Extend the overflow prevention example
Extend your file to include: .layout with display: grid, grid-template-columns: minmax(0,1fr); .layout>* with min-width: 0. Keep the selector relationships intact and inspect the preview.
Hint & worked example
Shrinkable tracks and wrapping text solve causes of overflow without hiding inaccessible content.
The requested selectors and declarations exist outside comments.
```
.layout { display: grid; grid-template-columns: minmax(0, 1fr); }
.layout > * { min-width: 0; }
```
Common mistake to avoid: Hiding all overflow always makes content accessible.
3
Verify the complete overflow prevention pattern
Finish the pattern with: .layout with display: grid, grid-template-columns: minmax(0,1fr); .layout>* with min-width: 0; p with overflow-wrap: anywhere. Keep the selector relationships intact and inspect the preview.
Hint & worked example
Shrinkable tracks and wrapping text solve causes of overflow without hiding inaccessible content.
The requested selectors and declarations exist outside comments.
```
.layout { display: grid; grid-template-columns: minmax(0, 1fr); }
.layout > * { min-width: 0; }
p { overflow-wrap: anywhere; }
```
Common mistake to avoid: If the page fits one desktop viewport, no narrower viewport needs checking.

Understand the pattern

Shrinkable tracks and wrapping text solve causes of overflow without hiding inaccessible content.

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

.layout { display: grid; grid-template-columns: minmax(0, 1fr); }
.layout > * { min-width: 0; }
p { overflow-wrap: anywhere; }

Shrinkable tracks and wrapping text solve causes of overflow without hiding inaccessible content.

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 overflow prevention?Shrinkable tracks and wrapping text solve causes of overflow without hiding inaccessible content.If the page fits one desktop viewport, no narrower viewport needs checking.Hiding all overflow always makes content accessible.

Apply it elsewhere

You reuse overflow prevention 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: Responsive layout checkpoint Try an incident drill

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MDN: CSS styling