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Course Library · Lesson 4 of 6
Digital · Guided lesson

Wrap Flex navigation and contain wide data

About 29 minutes · 7 reading + 22 practice and checks
Time includes reading, practice, and questions. Extra videos or further study are optional.
See this course’s project requirements

A local community schedule with Grid/Flexbox, long-label wrapping, narrow-screen source order, zoom checks and a four-case layout stress test.

Keep your working files in your own notebook or software. Save a private description, checklist, and work link in My Proof.

What to include

  • Deliver a repeatable overflow trigger and an observed element/viewport record.
  • Demonstrate and explain the combined track, item-minimum, and long-text wrapping repair.
  • Produce aligned source, visual, and keyboard-order evidence at a narrow viewport.
  • Verify wrapped navigation and an inspectable wide table without ordinary whole-page overflow.
  • Complete a four-condition rendered stress matrix or identify the exact unperformed conditions.
  • Deliver the fixed selected layout, failing baseline, source assertions, and honest rendered test record.

Review and revise

Use these criteria to check your work and choose what to improve.

  • The implementation or declared simulation follows the supplied contract and retains inspectable original inputs.
  • Normal, boundary and rejected cases are recorded with expected versus observed results.
  • The changed case has a correct explanation and does not rely on hidden state.
  • The project includes source, outputs, instructions and honest tool, privacy and verification limits.
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Before you begin

The idea in everyday life

Use schedule.html, fixed.css, broken.css and test-layout.py. Serve locally with python3 -m http.server 8765 --bind 127.0.0.1. The final source links fixed.css; switch that link temporarily to broken.css to reproduce the supplied narrow/long-content stress case.

The idea

Navigation can wrap onto another line; a genuinely wide table can scroll in a named, focusable region instead of forcing the entire page wider.

Follow along

Wrap Flex navigation and contain wide data — original worked practice

Navigation can wrap onto another line; a genuinely wide table can scroll in a named, focusable region instead of forcing the entire page wider.

Use schedule.html, fixed.css, broken.css and test-layout.py. Serve locally with python3 -m http.server 8765 --bind 127.0.0.1. The final source links fixed.css; switch that link temporarily to broken.css to reproduce the supplied narrow/long-content stress case.

  1. 1. Step 1

    Read nav display:flex, flex-wrap:wrap, and gap. Narrow the page while keeping every link and button.

    You should see: The navigation can wrap without deleting controls.

    Navigation can wrap onto another line; a genuinely wide table can scroll in a named, focusable region instead of forcing the entire page wider.

  2. 2. Step 2

    Locate the table-scroll region and its max-width:100% plus overflow-x:auto.

    You should see: Only the table region has intentional horizontal scrolling.

    Navigation can wrap onto another line; a genuinely wide table can scroll in a named, focusable region instead of forcing the entire page wider.

  3. 3. Step 3

    At 320 pixels Tab to the named table region and use available arrow-key scrolling. Record actual behavior.

    You should see: The table remains inspectable within its own region.

    Navigation can wrap onto another line; a genuinely wide table can scroll in a named, focusable region instead of forcing the entire page wider.

  4. 4. Step 4

    Check the whole document for accidental clipping and retained headers/caption.

    You should see: A navigation/table containment record.

    Navigation can wrap onto another line; a genuinely wide table can scroll in a named, focusable region instead of forcing the entire page wider.

Now change one thing

A table needs 560 pixels but its container is 320. Should overflow:hidden be used to discard the remaining columns?

Your work

What to finish

Verify wrapped navigation and an inspectable wide table without ordinary whole-page overflow.

Common mistake

Watch for this

Hiding overflowing columns or controls instead of preserving access in a scoped container.

How can I tell I understand it?

Demonstrate the rule: Navigation can wrap onto another line; a genuinely wide table can scroll in a named, focusable region instead of forcing the entire page wider. Use the supplied variant to distinguish a changed result from a broken implementation.

Try 3 questions

Quick knowledge check

Answer all 3 questions. Get at least 2 right and the lesson completes automatically.

Not yet passed

You’ll get an explanation for each answer. Signed in? Your results save to your account.

1Which Flex rule keeps narrow navigation controls available on multiple lines?
2What is the intended scope of horizontal table scrolling?
3Why keep the table caption and row/column headers?
0 of 3 answeredApply the lesson to a short question, then review the explanation.
4
Finish this lesson

Pass the check. We’ll save the progress.

Answer all 3 questions above and get at least 2 right. You can review the explanations and try again.

Go to the knowledge check
Tools, templates, and lesson sources

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Sources and further reading

Explore the references behind this lesson.

developer.mozilla.org — CSS_flexible_box_layout
Source & access notes · checked 2026-10-01

Relevant documented module/API behavior inspected during expansion authoring; actual execution evidence is recorded separately. No grant eligibility is established.

Access: Official page retrieved with the web reader on 2026-10-01. Documentation reading does not certify execution in every native tool or browser.

Reuse: Original local practice files, fictional data, worked examples and questions. Concepts paraphrased and linked; source exercises are not copied.

developer.mozilla.org — overflow wrap
Source & access notes · checked 2026-10-01

Relevant documented module/API behavior inspected during expansion authoring; actual execution evidence is recorded separately. No grant eligibility is established.

Access: Official page retrieved with the web reader on 2026-10-01. Documentation reading does not certify execution in every native tool or browser.

Reuse: Original local practice files, fictional data, worked examples and questions. Concepts paraphrased and linked; source exercises are not copied.

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