CSS • Chapter 57 • Foundations to Production
Print CSS
Every topic includes a CSS/HTML coding example, ten focused teaching examples, code explanation, expected result, practice, and responsive/translated-layout checks.
57.1 @media print
@media print is part of the CSS system covered in Chapter 57. 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 @media print in Chapter 57, 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 @media print, 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 57, topic 1.
Concept in plain language
@media print is part of the CSS system covered in Chapter 57. 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 media player for @media print. Keep only the declarations needed to see the behavior clearly, then inspect the computed styles. Chapter 57, topic 1, example 1.
Example 2: Change one value
Change one important CSS value in the notification example for @media print. Predict the visual difference before reloading the page. Chapter 57, topic 1, example 2.
Example 3: Narrow-screen test
Test @media print in the language selector at 320px, 375px, and tablet width. Watch for min-content sizing, unwrapped text, and elements that refuse to shrink. Chapter 57, topic 1, example 3.
Example 4: Translated-text test
Translate the course card into a language with longer labels while using @media print. Confirm buttons, headings, and navigation wrap without widening the page. Chapter 57, topic 1, example 4.
Example 5: Arabic/Persian test
Switch the navigation bar to Arabic or Persian. Verify logical spacing, start/end alignment, sidebar direction, and LTR code islands. Chapter 57, topic 1, example 5.
Example 6: Accessibility test
Check @media print in the article with keyboard focus, zoom, reduced motion, forced colors, and high text scaling where relevant. Chapter 57, topic 1, example 6.
Example 7: Cascade test
Add a competing rule to the profile panel and determine why the declaration for @media print wins or loses using the browser's Styles and Computed panels. Chapter 57, topic 1, example 7.
Example 8: Content-stress test
Fill the search form with very long words, URLs, translated text, images, and nested controls. Adjust @media print without hiding meaningful content. Chapter 57, topic 1, example 8.
Example 9: Refactoring test
Rewrite the dashboard so @media print uses reusable tokens, logical properties, or a component class while preserving the same behavior. Chapter 57, topic 1, example 9.
Example 10: Production review
Review @media print in the photo gallery for browser support, fallback behavior, RTL, small screens, print, motion preferences, and maintainability. Chapter 57, topic 1, example 10.
CSS/HTML coding example
<!-- HTML -->
<article class="article">Printable lesson</article>
<style>
@media print{nav,button{display:none}.article{max-width:none;color:#000;background:#fff}}
</style>Step-by-step code explanation
- Identify the selector and declaration that demonstrate @media print.
- Read the HTML structure first so you know which box or relationship the CSS is styling.
- Print media rules remove controls and simplify presentation for paper/PDF.
- 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 @media print 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 57, topic 1.
Practice exercise
Build a fresh example for @media print from Chapter 57. 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.
57.2 Hiding Controls
Hiding Controls is part of the CSS system covered in Chapter 57. 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 Hiding Controls in Chapter 57, 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 Hiding Controls, 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 57, topic 2.
Concept in plain language
Hiding Controls is part of the CSS system covered in Chapter 57. 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 course card for Hiding Controls. Keep only the declarations needed to see the behavior clearly, then inspect the computed styles. Chapter 57, topic 2, example 1.
Example 2: Change one value
Change one important CSS value in the navigation bar example for Hiding Controls. Predict the visual difference before reloading the page. Chapter 57, topic 2, example 2.
Example 3: Narrow-screen test
Test Hiding Controls in the article at 320px, 375px, and tablet width. Watch for min-content sizing, unwrapped text, and elements that refuse to shrink. Chapter 57, topic 2, example 3.
Example 4: Translated-text test
Translate the profile panel into a language with longer labels while using Hiding Controls. Confirm buttons, headings, and navigation wrap without widening the page. Chapter 57, topic 2, example 4.
Example 5: Arabic/Persian test
Switch the search form to Arabic or Persian. Verify logical spacing, start/end alignment, sidebar direction, and LTR code islands. Chapter 57, topic 2, example 5.
Example 6: Accessibility test
Check Hiding Controls in the dashboard with keyboard focus, zoom, reduced motion, forced colors, and high text scaling where relevant. Chapter 57, topic 2, example 6.
Example 7: Cascade test
Add a competing rule to the photo gallery and determine why the declaration for Hiding Controls wins or loses using the browser's Styles and Computed panels. Chapter 57, topic 2, example 7.
Example 8: Content-stress test
Fill the pricing table with very long words, URLs, translated text, images, and nested controls. Adjust Hiding Controls without hiding meaningful content. Chapter 57, topic 2, example 8.
Example 9: Refactoring test
Rewrite the lesson sidebar so Hiding Controls uses reusable tokens, logical properties, or a component class while preserving the same behavior. Chapter 57, topic 2, example 9.
Example 10: Production review
Review Hiding Controls in the contact form for browser support, fallback behavior, RTL, small screens, print, motion preferences, and maintainability. Chapter 57, topic 2, example 10.
CSS/HTML coding example
<!-- HTML -->
<button class="screen-only">Interactive control</button>
<style>
@media print{.screen-only{display:none!important}}
</style>Step-by-step code explanation
- Identify the selector and declaration that demonstrate Hiding Controls.
- Read the HTML structure first so you know which box or relationship the CSS is styling.
- Screen-only controls can be hidden in print output.
- 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 Hiding Controls 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 57, topic 2.
Practice exercise
Build a fresh example for Hiding Controls from Chapter 57. 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.
57.3 Page Break Control
Page Break Control is part of the CSS system covered in Chapter 57. 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 Page Break Control in Chapter 57, 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 Page Break Control, 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 57, topic 3.
Concept in plain language
Page Break Control is part of the CSS system covered in Chapter 57. 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 profile panel for Page Break Control. Keep only the declarations needed to see the behavior clearly, then inspect the computed styles. Chapter 57, topic 3, example 1.
Example 2: Change one value
Change one important CSS value in the search form example for Page Break Control. Predict the visual difference before reloading the page. Chapter 57, topic 3, example 2.
Example 3: Narrow-screen test
Test Page Break Control in the dashboard at 320px, 375px, and tablet width. Watch for min-content sizing, unwrapped text, and elements that refuse to shrink. Chapter 57, topic 3, example 3.
Example 4: Translated-text test
Translate the photo gallery into a language with longer labels while using Page Break Control. Confirm buttons, headings, and navigation wrap without widening the page. Chapter 57, topic 3, example 4.
Example 5: Arabic/Persian test
Switch the pricing table to Arabic or Persian. Verify logical spacing, start/end alignment, sidebar direction, and LTR code islands. Chapter 57, topic 3, example 5.
Example 6: Accessibility test
Check Page Break Control in the lesson sidebar with keyboard focus, zoom, reduced motion, forced colors, and high text scaling where relevant. Chapter 57, topic 3, example 6.
Example 7: Cascade test
Add a competing rule to the contact form and determine why the declaration for Page Break Control wins or loses using the browser's Styles and Computed panels. Chapter 57, topic 3, example 7.
Example 8: Content-stress test
Fill the button group with very long words, URLs, translated text, images, and nested controls. Adjust Page Break Control without hiding meaningful content. Chapter 57, topic 3, example 8.
Example 9: Refactoring test
Rewrite the data table so Page Break Control uses reusable tokens, logical properties, or a component class while preserving the same behavior. Chapter 57, topic 3, example 9.
Example 10: Production review
Review Page Break Control in the media player for browser support, fallback behavior, RTL, small screens, print, motion preferences, and maintainability. Chapter 57, topic 3, example 10.
CSS/HTML coding example
<!-- HTML -->
<section class="chapter"><h2>New chapter</h2></section>
<style>
@media print{h2{break-after:avoid}.chapter{break-before:page}}
</style>Step-by-step code explanation
- Identify the selector and declaration that demonstrate Page Break Control.
- Read the HTML structure first so you know which box or relationship the CSS is styling.
- break properties help control pagination.
- 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 Page Break Control 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 57, topic 3.
Practice exercise
Build a fresh example for Page Break Control from Chapter 57. 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.
57.4 Print-Friendly Links
Print-Friendly Links is part of the CSS system covered in Chapter 57. 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 Print-Friendly Links in Chapter 57, 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 Print-Friendly Links, 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 57, topic 4.
Concept in plain language
Print-Friendly Links is part of the CSS system covered in Chapter 57. 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 photo gallery for Print-Friendly Links. Keep only the declarations needed to see the behavior clearly, then inspect the computed styles. Chapter 57, topic 4, example 1.
Example 2: Change one value
Change one important CSS value in the pricing table example for Print-Friendly Links. Predict the visual difference before reloading the page. Chapter 57, topic 4, example 2.
Example 3: Narrow-screen test
Test Print-Friendly Links in the lesson sidebar at 320px, 375px, and tablet width. Watch for min-content sizing, unwrapped text, and elements that refuse to shrink. Chapter 57, topic 4, example 3.
Example 4: Translated-text test
Translate the contact form into a language with longer labels while using Print-Friendly Links. Confirm buttons, headings, and navigation wrap without widening the page. Chapter 57, topic 4, example 4.
Example 5: Arabic/Persian test
Switch the button group to Arabic or Persian. Verify logical spacing, start/end alignment, sidebar direction, and LTR code islands. Chapter 57, topic 4, example 5.
Example 6: Accessibility test
Check Print-Friendly Links in the data table with keyboard focus, zoom, reduced motion, forced colors, and high text scaling where relevant. Chapter 57, topic 4, example 6.
Example 7: Cascade test
Add a competing rule to the media player and determine why the declaration for Print-Friendly Links wins or loses using the browser's Styles and Computed panels. Chapter 57, topic 4, example 7.
Example 8: Content-stress test
Fill the notification with very long words, URLs, translated text, images, and nested controls. Adjust Print-Friendly Links without hiding meaningful content. Chapter 57, topic 4, example 8.
Example 9: Refactoring test
Rewrite the language selector so Print-Friendly Links uses reusable tokens, logical properties, or a component class while preserving the same behavior. Chapter 57, topic 4, example 9.
Example 10: Production review
Review Print-Friendly Links in the course card for browser support, fallback behavior, RTL, small screens, print, motion preferences, and maintainability. Chapter 57, topic 4, example 10.
CSS/HTML coding example
<!-- HTML -->
<a href="https://example.com">Reference</a>
<style>
@media print{a[href^="http"]::after{content:" (" attr(href) ")"}}
</style>Step-by-step code explanation
- Identify the selector and declaration that demonstrate Print-Friendly Links.
- Read the HTML structure first so you know which box or relationship the CSS is styling.
- Printed pages can expose external link destinations.
- 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 Print-Friendly Links 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 57, topic 4.
Practice exercise
Build a fresh example for Print-Friendly Links from Chapter 57. 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.
57.5 Print Typography
Print Typography is part of the CSS system covered in Chapter 57. 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 Print Typography in Chapter 57, 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 Print Typography, 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 57, topic 5.
Concept in plain language
Print Typography is part of the CSS system covered in Chapter 57. 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 contact form for Print Typography. Keep only the declarations needed to see the behavior clearly, then inspect the computed styles. Chapter 57, topic 5, example 1.
Example 2: Change one value
Change one important CSS value in the button group example for Print Typography. Predict the visual difference before reloading the page. Chapter 57, topic 5, example 2.
Example 3: Narrow-screen test
Test Print Typography in the data table at 320px, 375px, and tablet width. Watch for min-content sizing, unwrapped text, and elements that refuse to shrink. Chapter 57, topic 5, example 3.
Example 4: Translated-text test
Translate the media player into a language with longer labels while using Print Typography. Confirm buttons, headings, and navigation wrap without widening the page. Chapter 57, topic 5, example 4.
Example 5: Arabic/Persian test
Switch the notification to Arabic or Persian. Verify logical spacing, start/end alignment, sidebar direction, and LTR code islands. Chapter 57, topic 5, example 5.
Example 6: Accessibility test
Check Print Typography in the language selector with keyboard focus, zoom, reduced motion, forced colors, and high text scaling where relevant. Chapter 57, topic 5, example 6.
Example 7: Cascade test
Add a competing rule to the course card and determine why the declaration for Print Typography wins or loses using the browser's Styles and Computed panels. Chapter 57, topic 5, example 7.
Example 8: Content-stress test
Fill the navigation bar with very long words, URLs, translated text, images, and nested controls. Adjust Print Typography without hiding meaningful content. Chapter 57, topic 5, example 8.
Example 9: Refactoring test
Rewrite the article so Print Typography uses reusable tokens, logical properties, or a component class while preserving the same behavior. Chapter 57, topic 5, example 9.
Example 10: Production review
Review Print Typography in the profile panel for browser support, fallback behavior, RTL, small screens, print, motion preferences, and maintainability. Chapter 57, topic 5, example 10.
CSS/HTML coding example
<!-- HTML -->
<article><h1>Printed title</h1><p>Printed text</p></article>
<style>
@media print{body{font:11pt/1.45 Georgia,serif}h1{font-size:20pt}}
</style>Step-by-step code explanation
- Identify the selector and declaration that demonstrate Print Typography.
- Read the HTML structure first so you know which box or relationship the CSS is styling.
- Print-specific typography can improve paper readability.
- 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 Print Typography 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 57, topic 5.
Practice exercise
Build a fresh example for Print Typography from Chapter 57. 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 57 review — 10 questions and answers
1. What should you inspect first when @media print does not work as expected?
Answer: Inspect the matched rules, computed value, box size, layout context, and inherited values for @media print. Then reduce the example until the winning declaration is clear.
2. How should @media print be checked before publishing?
Answer: Test @media print 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 Hiding Controls does not work as expected?
Answer: Inspect the matched rules, computed value, box size, layout context, and inherited values for Hiding Controls. Then reduce the example until the winning declaration is clear.
4. How should Hiding Controls be checked before publishing?
Answer: Test Hiding Controls 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 Page Break Control does not work as expected?
Answer: Inspect the matched rules, computed value, box size, layout context, and inherited values for Page Break Control. Then reduce the example until the winning declaration is clear.
6. How should Page Break Control be checked before publishing?
Answer: Test Page Break Control 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 Print-Friendly Links does not work as expected?
Answer: Inspect the matched rules, computed value, box size, layout context, and inherited values for Print-Friendly Links. Then reduce the example until the winning declaration is clear.
8. How should Print-Friendly Links be checked before publishing?
Answer: Test Print-Friendly Links 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 Print Typography does not work as expected?
Answer: Inspect the matched rules, computed value, box size, layout context, and inherited values for Print Typography. Then reduce the example until the winning declaration is clear.
10. How should Print Typography be checked before publishing?
Answer: Test Print Typography 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.