Beginning Drupal 8

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Chapter 18 ■ Creating a Responsive Site Figure 18-1. Normal laptop screen resolution Open that same page on an iPhone and the columns shrink to 33% of 320 pixels, or approximately 106 pixels. The columns become narrow and long, and the text within the columns becomes unreadable— or at best the viewer has to scroll left and right to see very small columns of very small text and images (see Figure 18-2). Figure 18-2. Normal iPhone 4 screen resolution A better approach would be to detect that the user is viewing the site on a device that is 320 pixels wide and, instead of offering three columns horizontally spread across the page, make each column 320 pixels wide (or 100% of the width) and stack the columns on top of each other. At 320 pixels wide, each column is nearly as wide as viewing that column on a 15-inch laptop screen, still very readable on an iPhone 4 (see Figure 18-3). 194
Chapter 18 ■ Creating a Responsive Site Figure 18-3. Stacked columns Media Queries is a CSS tool that, in conjunction with the browser reporting the width of the screen, allows you to write CSS specifically for devices of a given width. The general format of a media query is @media (max-width: 600px) { } .body { font-size: .9em; } The query begins with @media and max-width: 600px specifies that the CSS within the { } should only be applied when the width of the browser window is 600px or smaller. You can also specify ranges of widths within your query, such as: @media (min-width: 321px) and (max-width: 599px) { } .body { font-size: .7em; } In this case any device with a screen width of 321px or greater and less than or equal to 599px will have the CSS contained within the { } applied. In the previous two examples, any body text on a device that is up to 600px wide will have a font size of .9em, whereas devices that are between 321px and 599px will have a font size of .7em (em units are explained in the section “Common CSS Changes to Address Responsiveness” later in the chapter). 195
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Beginning Drupal 8 Todd Tomlinson
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There are so many people to thank f
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■ Contents at a Glance ■Chapter
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■ Contents Authoring Information
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■ Contents ■Chapter ■ 8: Drup
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■ Contents ■Chapter ■ 13: Mul
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■ Contents Updating the Article C
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■ Contents Moving the Drupal Dist
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About the Technical Reviewer Clive
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Introduction In its relatively shor
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Chapter 1 ■ Introduction to Drupa
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Chapter 2 Creating and Managing Con
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Chapter 2 ■ Creating and Managing
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Chapter 3 Creating and Managing Use
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Chapter 4 ■ Taxonomy “individua
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Chapter 4 ■ Taxonomy Figure 4-3.
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Chapter 4 ■ Taxonomy Clicking the
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Chapter 4 ■ Taxonomy If you happe
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Chapter 5 ■ Content Types • Hav
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Chapter 5 ■ Content Types The fir
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Chapter 6 ■ Using Drupal Themes S
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Chapter 6 ■ Using Drupal Themes O
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Chapter 7 ■ Creating Menus Figure
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Chapter 7 ■ Creating Menus Clicki
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Chapter 7 ■ Creating Menus At thi
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Chapter 7 ■ Creating Menus Click
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Chapter 8 ■ Drupal Blocks Figure
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Chapter 8 ■ Drupal Blocks appear
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Chapter 8 ■ Drupal Blocks Using B
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Chapter 9 ■ Views Figure 9-1. Ver
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Chapter 9 ■ Views Figure 9-3. The
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Chapter 9 ■ Views 4. The Show par
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Chapter 9 ■ Views 14. If your vie
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Chapter 9 ■ Views 6. In the Filte
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Chapter 9 ■ Views Figure 9-7. Ren
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Chapter 9 ■ Views Figure 9-9. Fil
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Chapter 9 ■ Views Figure 9-11. Ta
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Chapter 9 ■ Views Summary I’ve
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Chapter 10 ■ Creating Pages Figur
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Chapter 10 ■ Creating Pages We ca
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Chapter 10 ■ Creating Pages The f
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Chapter 10 ■ Creating Pages 6. Th
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Chapter 11 Drupal Modules Drupal is
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Chapter 11 ■ Drupal Modules on yo
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Chapter 11 ■ Drupal Modules 2. On
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Configuring Modules and Setting Per
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Chapter 11 ■ Drupal Modules Figur
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Chapter 22 ■ Building a Commerce
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Appendix A ■ Installing Drupal Se
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Appendix A ■ Installing Drupal Ne
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Appendix A ■ Installing Drupal Co
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Appendix A ■ Installing Drupal Fi
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Appendix B Additional Resources As
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Video Tutorials Appendix B ■ Addi
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■ index Blog site (cont.) theme,
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■ index Drupal users groups (cont
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■ index • S Security patches,
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