CSS • Chapter 28 • Foundations to Production
Text Wrapping and Hyphenation
Every topic includes a CSS/HTML coding example, ten focused teaching examples, code explanation, expected result, practice, and responsive/translated-layout checks.
28.1 overflow-wrap
overflow-wrap is part of the CSS system covered in Chapter 28. The key is to understand what box, selector, cascade rule, layout algorithm, or user preference the declaration affects, then test the result at more than one viewport size. The goal is to connect the syntax to the browser's layout and cascade decisions rather than memorize a property name.
For overflow-wrap in Chapter 28, inspect the matched selector, computed value, containing block or formatting context, intrinsic size, and any min/max constraints. When translation is enabled, also inspect whether longer text or RTL direction changes the available inline space.
Start with one small example for overflow-wrap, resize the viewport, increase text size, translate the label, and add a competing rule. This shows whether the technique remains predictable under real content rather than only in a fixed desktop mockup. This explanation is specific to Chapter 28, topic 1.
Concept in plain language
overflow-wrap is part of the CSS system covered in Chapter 28. The key is to understand what box, selector, cascade rule, layout algorithm, or user preference the declaration affects, then test the result at more than one viewport size.
10 teaching examples
Example 1: Smallest useful case
Build a minimal search form for overflow-wrap. Keep only the declarations needed to see the behavior clearly, then inspect the computed styles. Chapter 28, topic 1, example 1.
Example 2: Change one value
Change one important CSS value in the dashboard example for overflow-wrap. Predict the visual difference before reloading the page. Chapter 28, topic 1, example 2.
Example 3: Narrow-screen test
Test overflow-wrap in the photo gallery at 320px, 375px, and tablet width. Watch for min-content sizing, unwrapped text, and elements that refuse to shrink. Chapter 28, topic 1, example 3.
Example 4: Translated-text test
Translate the pricing table into a language with longer labels while using overflow-wrap. Confirm buttons, headings, and navigation wrap without widening the page. Chapter 28, topic 1, example 4.
Example 5: Arabic/Persian test
Switch the lesson sidebar to Arabic or Persian. Verify logical spacing, start/end alignment, sidebar direction, and LTR code islands. Chapter 28, topic 1, example 5.
Example 6: Accessibility test
Check overflow-wrap in the contact form with keyboard focus, zoom, reduced motion, forced colors, and high text scaling where relevant. Chapter 28, topic 1, example 6.
Example 7: Cascade test
Add a competing rule to the button group and determine why the declaration for overflow-wrap wins or loses using the browser's Styles and Computed panels. Chapter 28, topic 1, example 7.
Example 8: Content-stress test
Fill the data table with very long words, URLs, translated text, images, and nested controls. Adjust overflow-wrap without hiding meaningful content. Chapter 28, topic 1, example 8.
Example 9: Refactoring test
Rewrite the media player so overflow-wrap uses reusable tokens, logical properties, or a component class while preserving the same behavior. Chapter 28, topic 1, example 9.
Example 10: Production review
Review overflow-wrap in the notification for browser support, fallback behavior, RTL, small screens, print, motion preferences, and maintainability. Chapter 28, topic 1, example 10.
CSS/HTML coding example
<!-- HTML -->
<button class="translated-label">A very long translated label can wrap safely</button>
<style>
.translated-label { overflow-wrap:anywhere; min-width:0; }
</style>Step-by-step code explanation
- Identify the selector and declaration that demonstrate overflow-wrap.
- Read the HTML structure first so you know which box or relationship the CSS is styling.
- overflow-wrap:anywhere permits emergency line breaks in long translated text.
- Resize the viewport and test long translated content. Confirm that flex/grid items use min-width:0 where needed and that only code or genuinely wide content scrolls locally.
- Switch to Arabic or Persian and verify logical start/end spacing, text alignment, sidebar direction, and LTR isolation for code.
Expected result: The browser visibly demonstrates overflow-wrap without requiring the page to exceed the viewport width. If the example contains wide code, only the code block scrolls horizontally. This expected result belongs to Chapter 28, topic 1.
Practice exercise
Build a fresh example for overflow-wrap from Chapter 28. Change one value, inspect the computed styles, test at 320px and tablet width, translate the visible text, switch the page to RTL, and explain why the final declaration or layout behavior occurs.
28.2 word-break
word-break is part of the CSS system covered in Chapter 28. The key is to understand what box, selector, cascade rule, layout algorithm, or user preference the declaration affects, then test the result at more than one viewport size. The goal is to connect the syntax to the browser's layout and cascade decisions rather than memorize a property name.
For word-break in Chapter 28, inspect the matched selector, computed value, containing block or formatting context, intrinsic size, and any min/max constraints. When translation is enabled, also inspect whether longer text or RTL direction changes the available inline space.
Start with one small example for word-break, resize the viewport, increase text size, translate the label, and add a competing rule. This shows whether the technique remains predictable under real content rather than only in a fixed desktop mockup. This explanation is specific to Chapter 28, topic 2.
Concept in plain language
word-break is part of the CSS system covered in Chapter 28. The key is to understand what box, selector, cascade rule, layout algorithm, or user preference the declaration affects, then test the result at more than one viewport size.
10 teaching examples
Example 1: Smallest useful case
Build a minimal pricing table for word-break. Keep only the declarations needed to see the behavior clearly, then inspect the computed styles. Chapter 28, topic 2, example 1.
Example 2: Change one value
Change one important CSS value in the lesson sidebar example for word-break. Predict the visual difference before reloading the page. Chapter 28, topic 2, example 2.
Example 3: Narrow-screen test
Test word-break in the contact form at 320px, 375px, and tablet width. Watch for min-content sizing, unwrapped text, and elements that refuse to shrink. Chapter 28, topic 2, example 3.
Example 4: Translated-text test
Translate the button group into a language with longer labels while using word-break. Confirm buttons, headings, and navigation wrap without widening the page. Chapter 28, topic 2, example 4.
Example 5: Arabic/Persian test
Switch the data table to Arabic or Persian. Verify logical spacing, start/end alignment, sidebar direction, and LTR code islands. Chapter 28, topic 2, example 5.
Example 6: Accessibility test
Check word-break in the media player with keyboard focus, zoom, reduced motion, forced colors, and high text scaling where relevant. Chapter 28, topic 2, example 6.
Example 7: Cascade test
Add a competing rule to the notification and determine why the declaration for word-break wins or loses using the browser's Styles and Computed panels. Chapter 28, topic 2, example 7.
Example 8: Content-stress test
Fill the language selector with very long words, URLs, translated text, images, and nested controls. Adjust word-break without hiding meaningful content. Chapter 28, topic 2, example 8.
Example 9: Refactoring test
Rewrite the course card so word-break uses reusable tokens, logical properties, or a component class while preserving the same behavior. Chapter 28, topic 2, example 9.
Example 10: Production review
Review word-break in the navigation bar for browser support, fallback behavior, RTL, small screens, print, motion preferences, and maintainability. Chapter 28, topic 2, example 10.
CSS/HTML coding example
<!-- HTML -->
<p class="text" lang="en">A long paragraph demonstrates the typography rule in a real content block.</p>
<style>
.text{word-break:break-word}
</style>Step-by-step code explanation
- Identify the selector and declaration that demonstrate word-break.
- Read the HTML structure first so you know which box or relationship the CSS is styling.
- The declaration demonstrates word-break on paragraph text.
- Resize the viewport and test long translated content. Confirm that flex/grid items use min-width:0 where needed and that only code or genuinely wide content scrolls locally.
- Switch to Arabic or Persian and verify logical start/end spacing, text alignment, sidebar direction, and LTR isolation for code.
Expected result: The browser visibly demonstrates word-break without requiring the page to exceed the viewport width. If the example contains wide code, only the code block scrolls horizontally. This expected result belongs to Chapter 28, topic 2.
Practice exercise
Build a fresh example for word-break from Chapter 28. Change one value, inspect the computed styles, test at 320px and tablet width, translate the visible text, switch the page to RTL, and explain why the final declaration or layout behavior occurs.
28.3 hyphens
hyphens is part of the CSS system covered in Chapter 28. The key is to understand what box, selector, cascade rule, layout algorithm, or user preference the declaration affects, then test the result at more than one viewport size. The goal is to connect the syntax to the browser's layout and cascade decisions rather than memorize a property name.
For hyphens in Chapter 28, inspect the matched selector, computed value, containing block or formatting context, intrinsic size, and any min/max constraints. When translation is enabled, also inspect whether longer text or RTL direction changes the available inline space.
Start with one small example for hyphens, resize the viewport, increase text size, translate the label, and add a competing rule. This shows whether the technique remains predictable under real content rather than only in a fixed desktop mockup. This explanation is specific to Chapter 28, topic 3.
Concept in plain language
hyphens is part of the CSS system covered in Chapter 28. The key is to understand what box, selector, cascade rule, layout algorithm, or user preference the declaration affects, then test the result at more than one viewport size.
10 teaching examples
Example 1: Smallest useful case
Build a minimal button group for hyphens. Keep only the declarations needed to see the behavior clearly, then inspect the computed styles. Chapter 28, topic 3, example 1.
Example 2: Change one value
Change one important CSS value in the data table example for hyphens. Predict the visual difference before reloading the page. Chapter 28, topic 3, example 2.
Example 3: Narrow-screen test
Test hyphens in the media player at 320px, 375px, and tablet width. Watch for min-content sizing, unwrapped text, and elements that refuse to shrink. Chapter 28, topic 3, example 3.
Example 4: Translated-text test
Translate the notification into a language with longer labels while using hyphens. Confirm buttons, headings, and navigation wrap without widening the page. Chapter 28, topic 3, example 4.
Example 5: Arabic/Persian test
Switch the language selector to Arabic or Persian. Verify logical spacing, start/end alignment, sidebar direction, and LTR code islands. Chapter 28, topic 3, example 5.
Example 6: Accessibility test
Check hyphens in the course card with keyboard focus, zoom, reduced motion, forced colors, and high text scaling where relevant. Chapter 28, topic 3, example 6.
Example 7: Cascade test
Add a competing rule to the navigation bar and determine why the declaration for hyphens wins or loses using the browser's Styles and Computed panels. Chapter 28, topic 3, example 7.
Example 8: Content-stress test
Fill the article with very long words, URLs, translated text, images, and nested controls. Adjust hyphens without hiding meaningful content. Chapter 28, topic 3, example 8.
Example 9: Refactoring test
Rewrite the profile panel so hyphens uses reusable tokens, logical properties, or a component class while preserving the same behavior. Chapter 28, topic 3, example 9.
Example 10: Production review
Review hyphens in the search form for browser support, fallback behavior, RTL, small screens, print, motion preferences, and maintainability. Chapter 28, topic 3, example 10.
CSS/HTML coding example
<!-- HTML -->
<p class="text" lang="en">A long paragraph demonstrates the typography rule in a real content block.</p>
<style>
.text{hyphens:auto}
</style>Step-by-step code explanation
- Identify the selector and declaration that demonstrate hyphens.
- Read the HTML structure first so you know which box or relationship the CSS is styling.
- The declaration demonstrates hyphens on paragraph text.
- Resize the viewport and test long translated content. Confirm that flex/grid items use min-width:0 where needed and that only code or genuinely wide content scrolls locally.
- Switch to Arabic or Persian and verify logical start/end spacing, text alignment, sidebar direction, and LTR isolation for code.
Expected result: The browser visibly demonstrates hyphens without requiring the page to exceed the viewport width. If the example contains wide code, only the code block scrolls horizontally. This expected result belongs to Chapter 28, topic 3.
Practice exercise
Build a fresh example for hyphens from Chapter 28. Change one value, inspect the computed styles, test at 320px and tablet width, translate the visible text, switch the page to RTL, and explain why the final declaration or layout behavior occurs.
28.4 text-wrap
text-wrap is part of the CSS system covered in Chapter 28. The key is to understand what box, selector, cascade rule, layout algorithm, or user preference the declaration affects, then test the result at more than one viewport size. The goal is to connect the syntax to the browser's layout and cascade decisions rather than memorize a property name.
For text-wrap in Chapter 28, inspect the matched selector, computed value, containing block or formatting context, intrinsic size, and any min/max constraints. When translation is enabled, also inspect whether longer text or RTL direction changes the available inline space.
Start with one small example for text-wrap, resize the viewport, increase text size, translate the label, and add a competing rule. This shows whether the technique remains predictable under real content rather than only in a fixed desktop mockup. This explanation is specific to Chapter 28, topic 4.
Concept in plain language
text-wrap is part of the CSS system covered in Chapter 28. The key is to understand what box, selector, cascade rule, layout algorithm, or user preference the declaration affects, then test the result at more than one viewport size.
10 teaching examples
Example 1: Smallest useful case
Build a minimal notification for text-wrap. Keep only the declarations needed to see the behavior clearly, then inspect the computed styles. Chapter 28, topic 4, example 1.
Example 2: Change one value
Change one important CSS value in the language selector example for text-wrap. Predict the visual difference before reloading the page. Chapter 28, topic 4, example 2.
Example 3: Narrow-screen test
Test text-wrap in the course card at 320px, 375px, and tablet width. Watch for min-content sizing, unwrapped text, and elements that refuse to shrink. Chapter 28, topic 4, example 3.
Example 4: Translated-text test
Translate the navigation bar into a language with longer labels while using text-wrap. Confirm buttons, headings, and navigation wrap without widening the page. Chapter 28, topic 4, example 4.
Example 5: Arabic/Persian test
Switch the article to Arabic or Persian. Verify logical spacing, start/end alignment, sidebar direction, and LTR code islands. Chapter 28, topic 4, example 5.
Example 6: Accessibility test
Check text-wrap in the profile panel with keyboard focus, zoom, reduced motion, forced colors, and high text scaling where relevant. Chapter 28, topic 4, example 6.
Example 7: Cascade test
Add a competing rule to the search form and determine why the declaration for text-wrap wins or loses using the browser's Styles and Computed panels. Chapter 28, topic 4, example 7.
Example 8: Content-stress test
Fill the dashboard with very long words, URLs, translated text, images, and nested controls. Adjust text-wrap without hiding meaningful content. Chapter 28, topic 4, example 8.
Example 9: Refactoring test
Rewrite the photo gallery so text-wrap uses reusable tokens, logical properties, or a component class while preserving the same behavior. Chapter 28, topic 4, example 9.
Example 10: Production review
Review text-wrap in the pricing table for browser support, fallback behavior, RTL, small screens, print, motion preferences, and maintainability. Chapter 28, topic 4, example 10.
CSS/HTML coding example
<!-- HTML -->
<p class="text" lang="en">A long paragraph demonstrates the typography rule in a real content block.</p>
<style>
.text{text-wrap:pretty}
</style>Step-by-step code explanation
- Identify the selector and declaration that demonstrate text-wrap.
- Read the HTML structure first so you know which box or relationship the CSS is styling.
- The declaration demonstrates text-wrap on paragraph text.
- Resize the viewport and test long translated content. Confirm that flex/grid items use min-width:0 where needed and that only code or genuinely wide content scrolls locally.
- Switch to Arabic or Persian and verify logical start/end spacing, text alignment, sidebar direction, and LTR isolation for code.
Expected result: The browser visibly demonstrates text-wrap without requiring the page to exceed the viewport width. If the example contains wide code, only the code block scrolls horizontally. This expected result belongs to Chapter 28, topic 4.
Practice exercise
Build a fresh example for text-wrap from Chapter 28. Change one value, inspect the computed styles, test at 320px and tablet width, translate the visible text, switch the page to RTL, and explain why the final declaration or layout behavior occurs.
28.5 line-clamp
line-clamp is part of the CSS system covered in Chapter 28. The key is to understand what box, selector, cascade rule, layout algorithm, or user preference the declaration affects, then test the result at more than one viewport size. The goal is to connect the syntax to the browser's layout and cascade decisions rather than memorize a property name.
For line-clamp in Chapter 28, inspect the matched selector, computed value, containing block or formatting context, intrinsic size, and any min/max constraints. When translation is enabled, also inspect whether longer text or RTL direction changes the available inline space.
Start with one small example for line-clamp, resize the viewport, increase text size, translate the label, and add a competing rule. This shows whether the technique remains predictable under real content rather than only in a fixed desktop mockup. This explanation is specific to Chapter 28, topic 5.
Concept in plain language
line-clamp is part of the CSS system covered in Chapter 28. The key is to understand what box, selector, cascade rule, layout algorithm, or user preference the declaration affects, then test the result at more than one viewport size.
10 teaching examples
Example 1: Smallest useful case
Build a minimal navigation bar for line-clamp. Keep only the declarations needed to see the behavior clearly, then inspect the computed styles. Chapter 28, topic 5, example 1.
Example 2: Change one value
Change one important CSS value in the article example for line-clamp. Predict the visual difference before reloading the page. Chapter 28, topic 5, example 2.
Example 3: Narrow-screen test
Test line-clamp in the profile panel at 320px, 375px, and tablet width. Watch for min-content sizing, unwrapped text, and elements that refuse to shrink. Chapter 28, topic 5, example 3.
Example 4: Translated-text test
Translate the search form into a language with longer labels while using line-clamp. Confirm buttons, headings, and navigation wrap without widening the page. Chapter 28, topic 5, example 4.
Example 5: Arabic/Persian test
Switch the dashboard to Arabic or Persian. Verify logical spacing, start/end alignment, sidebar direction, and LTR code islands. Chapter 28, topic 5, example 5.
Example 6: Accessibility test
Check line-clamp in the photo gallery with keyboard focus, zoom, reduced motion, forced colors, and high text scaling where relevant. Chapter 28, topic 5, example 6.
Example 7: Cascade test
Add a competing rule to the pricing table and determine why the declaration for line-clamp wins or loses using the browser's Styles and Computed panels. Chapter 28, topic 5, example 7.
Example 8: Content-stress test
Fill the lesson sidebar with very long words, URLs, translated text, images, and nested controls. Adjust line-clamp without hiding meaningful content. Chapter 28, topic 5, example 8.
Example 9: Refactoring test
Rewrite the contact form so line-clamp uses reusable tokens, logical properties, or a component class while preserving the same behavior. Chapter 28, topic 5, example 9.
Example 10: Production review
Review line-clamp in the button group for browser support, fallback behavior, RTL, small screens, print, motion preferences, and maintainability. Chapter 28, topic 5, example 10.
CSS/HTML coding example
<!-- HTML -->
<h1 class="title">Fluid title</h1>
<style>
.title { font-size:clamp(1.75rem,4vw,3.5rem); }
</style>Step-by-step code explanation
- Identify the selector and declaration that demonstrate line-clamp.
- Read the HTML structure first so you know which box or relationship the CSS is styling.
- clamp() provides a fluid preferred value with minimum and maximum limits.
- Resize the viewport and test long translated content. Confirm that flex/grid items use min-width:0 where needed and that only code or genuinely wide content scrolls locally.
- Switch to Arabic or Persian and verify logical start/end spacing, text alignment, sidebar direction, and LTR isolation for code.
Expected result: The browser visibly demonstrates line-clamp without requiring the page to exceed the viewport width. If the example contains wide code, only the code block scrolls horizontally. This expected result belongs to Chapter 28, topic 5.
Practice exercise
Build a fresh example for line-clamp from Chapter 28. Change one value, inspect the computed styles, test at 320px and tablet width, translate the visible text, switch the page to RTL, and explain why the final declaration or layout behavior occurs.
Chapter 28 review — 10 questions and answers
1. What should you inspect first when overflow-wrap does not work as expected?
Answer: Inspect the matched rules, computed value, box size, layout context, and inherited values for overflow-wrap. Then reduce the example until the winning declaration is clear.
2. How should overflow-wrap be checked before publishing?
Answer: Test overflow-wrap on narrow and wide screens, with long translated text, at increased zoom, and in RTL where direction can affect layout. Add a fallback if browser support or user preferences require one.
3. What should you inspect first when word-break does not work as expected?
Answer: Inspect the matched rules, computed value, box size, layout context, and inherited values for word-break. Then reduce the example until the winning declaration is clear.
4. How should word-break be checked before publishing?
Answer: Test word-break on narrow and wide screens, with long translated text, at increased zoom, and in RTL where direction can affect layout. Add a fallback if browser support or user preferences require one.
5. What should you inspect first when hyphens does not work as expected?
Answer: Inspect the matched rules, computed value, box size, layout context, and inherited values for hyphens. Then reduce the example until the winning declaration is clear.
6. How should hyphens be checked before publishing?
Answer: Test hyphens on narrow and wide screens, with long translated text, at increased zoom, and in RTL where direction can affect layout. Add a fallback if browser support or user preferences require one.
7. What should you inspect first when text-wrap does not work as expected?
Answer: Inspect the matched rules, computed value, box size, layout context, and inherited values for text-wrap. Then reduce the example until the winning declaration is clear.
8. How should text-wrap be checked before publishing?
Answer: Test text-wrap on narrow and wide screens, with long translated text, at increased zoom, and in RTL where direction can affect layout. Add a fallback if browser support or user preferences require one.
9. What should you inspect first when line-clamp does not work as expected?
Answer: Inspect the matched rules, computed value, box size, layout context, and inherited values for line-clamp. Then reduce the example until the winning declaration is clear.
10. How should line-clamp be checked before publishing?
Answer: Test line-clamp on narrow and wide screens, with long translated text, at increased zoom, and in RTL where direction can affect layout. Add a fallback if browser support or user preferences require one.