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jQuery Cookbook

Cover of jQuery Cookbook by Cody Lindley Published by O'Reilly Media, Inc.
  1. jQuery Cookbook
    1. SPECIAL OFFER: Upgrade this ebook with O’Reilly
    2. A Note Regarding Supplemental Files
    3. Foreword
    4. Contributors
      1. Chapter Authors
      2. Tech Editors
    5. Preface
      1. Who This Book Is For
      2. What You’ll Learn
      3. jQuery Style and Conventions
      4. Other Options
      5. If You Have Problems Making Examples Work
      6. If You Like (or Don’t Like) This Book
      7. Conventions Used in This Book
      8. Using Code Examples
      9. Safari® Books Online
      10. How to Contact Us
    6. 1. jQuery Basics
      1. Introduction
      2. 1.1. Including the jQuery Library Code in an HTML Page
      3. 1.2. Executing jQuery/JavaScript Coded After the DOM Has Loaded but Before Complete Page Load
      4. 1.3. Selecting DOM Elements Using Selectors and the jQuery Function
      5. 1.4. Selecting DOM Elements Within a Specified Context
      6. 1.5. Filtering a Wrapper Set of DOM Elements
      7. 1.6. Finding Descendant Elements Within the Currently Selected Wrapper Set
      8. 1.7. Returning to the Prior Selection Before a Destructive Change
      9. 1.8. Including the Previous Selection with the Current Selection
      10. 1.9. Traversing the DOM Based on Your Current Context to Acquire a New Set of DOM Elements
      11. 1.10. Creating, Operating on, and Inserting DOM Elements
      12. 1.11. Removing DOM Elements
      13. 1.12. Replacing DOM Elements
      14. 1.13. Cloning DOM Elements
      15. 1.14. Getting, Setting, and Removing DOM Element Attributes
      16. 1.15. Getting and Setting HTML Content
      17. 1.16. Getting and Setting Text Content
      18. 1.17. Using the $ Alias Without Creating Global Conflicts
    7. 2. Selecting Elements with jQuery
      1. Introduction
      2. 2.1. Selecting Child Elements Only
      3. 2.2. Selecting Specific Siblings
      4. 2.3. Selecting Elements by Index Order
      5. 2.4. Selecting Elements That Are Currently Animating
      6. 2.5. Selecting Elements Based on What They Contain
      7. 2.6. Selecting Elements by What They Don’t Match
      8. 2.7. Selecting Elements Based on Their Visibility
      9. 2.8. Selecting Elements Based on Attributes
      10. 2.9. Selecting Form Elements by Type
      11. 2.10. Selecting an Element with Specific Characteristics
      12. 2.11. Using the Context Parameter
      13. 2.12. Creating a Custom Filter Selector
    8. 3. Beyond the Basics
      1. Introduction
      2. 3.1. Looping Through a Set of Selected Results
      3. 3.2. Reducing the Selection Set to a Specified Item
      4. 3.3. Convert a Selected jQuery Object into a Raw DOM Object
      5. 3.4. Getting the Index of an Item in a Selection
      6. 3.5. Making a Unique Array of Values from an Existing Array
      7. 3.6. Performing an Action on a Subset of the Selected Set
      8. 3.7. Configuring jQuery Not to Conflict with Other Libraries
      9. 3.8. Adding Functionality with Plugins
      10. 3.9. Determining the Exact Query That Was Used
    9. 4. jQuery Utilities
      1. Introduction
      2. 4.1. Detecting Features with jQuery.support
      3. 4.2. Iterating Over Arrays and Objects with jQuery.each
      4. 4.3. Filtering Arrays with jQuery.grep
      5. 4.4. Iterating and Modifying Array Entries with jQuery.map
      6. 4.5. Combining Two Arrays with jQuery.merge
      7. 4.6. Filtering Out Duplicate Array Entries with jQuery.unique
      8. 4.7. Testing Callback Functions with jQuery.isFunction
      9. 4.8. Removing Whitespace from Strings or Form Values with jQuery.trim
      10. 4.9. Attaching Objects and Data to DOM with jQuery.data
      11. 4.10. Extending Objects with jQuery.extend
    10. 5. Faster, Simpler, More Fun
      1. Introduction
      2. 5.1. That’s Not jQuery, It’s JavaScript!
      3. 5.2. What’s Wrong with $(this)?
      4. 5.3. Removing Redundant Repetition
      5. 5.4. Formatting Your jQuery Chains
      6. 5.5. Borrowing Code from Other Libraries
      7. 5.6. Writing a Custom Iterator
      8. 5.7. Toggling an Attribute
      9. 5.8. Finding the Bottlenecks
      10. 5.9. Caching Your jQuery Objects
      11. 5.10. Writing Faster Selectors
      12. 5.11. Loading Tables Faster
      13. 5.12. Coding Bare-Metal Loops
      14. 5.13. Reducing Name Lookups
      15. 5.14. Updating the DOM Faster with .innerHTML
      16. 5.15. Debugging? Break Those Chains
      17. 5.16. Is It a jQuery Bug?
      18. 5.17. Tracing into jQuery
      19. 5.18. Making Fewer Server Requests
      20. 5.19. Writing Unobtrusive JavaScript
      21. 5.20. Using jQuery for Progressive Enhancement
      22. 5.21. Making Your Pages Accessible
    11. 6. Dimensions
      1. Introduction
      2. 6.1. Finding the Dimensions of the Window and Document
      3. 6.2. Finding the Dimensions of an Element
      4. 6.3. Finding the Offset of an Element
      5. 6.4. Scrolling an Element into View
      6. 6.5. Determining Whether an Element Is Within the Viewport
      7. 6.6. Centering an Element Within the Viewport
      8. 6.7. Absolutely Positioning an Element at Its Current Position
      9. 6.8. Positioning an Element Relative to Another Element
      10. 6.9. Switching Stylesheets Based on Browser Width
    12. 7. Effects
      1. Introduction
      2. 7.1. Sliding and Fading Elements in and out of View
      3. 7.2. Making Elements Visible by Sliding Them Up
      4. 7.3. Creating a Horizontal Accordion
      5. 7.4. Simultaneously Sliding and Fading Elements
      6. 7.5. Applying Sequential Effects
      7. 7.6. Determining Whether Elements Are Currently Being Animated
      8. 7.7. Stopping and Resetting Animations
      9. 7.8. Using Custom Easing Methods for Effects
      10. 7.9. Disabling All Effects
      11. 7.10. Using jQuery UI for Advanced Effects
    13. 8. Events
      1. Introduction
      2. 8.1. Attaching a Handler to Many Events
      3. 8.2. Reusing a Handler Function with Different Data
      4. 8.3. Removing a Whole Set of Event Handlers
      5. 8.4. Triggering Specific Event Handlers
      6. 8.5. Passing Dynamic Data to Event Handlers
      7. 8.6. Accessing an Element ASAP (Before document.ready)
      8. 8.7. Stopping the Handler Execution Loop
      9. 8.8. Getting the Correct Element When Using event.target
      10. 8.9. Avoid Multiple hover() Animations in Parallel
      11. 8.10. Making Event Handlers Work for Newly Added Elements
    14. 9. Advanced Events
      1. Introduction
      2. 9.1. Getting jQuery to Work When Loaded Dynamically
      3. 9.2. Speeding Up Global Event Triggering
      4. 9.3. Creating Your Own Events
      5. 9.4. Letting Event Handlers Provide Needed Data
      6. 9.5. Creating Event-Driven Plugins
      7. 9.6. Getting Notified When jQuery Methods Are Called
      8. 9.7. Using Objects’ Methods as Event Listeners
    15. 10. HTML Form Enhancements from Scratch
      1. Introduction
      2. 10.1. Focusing a Text Input on Page Load
      3. 10.2. Disabling and Enabling Form Elements
      4. 10.3. Selecting Radio Buttons Automatically
      5. 10.4. (De)selecting All Checkboxes Using Dedicated Links
      6. 10.5. (De)selecting All Checkboxes Using a Single Toggle
      7. 10.6. Adding and Removing Select Options
      8. 10.7. Autotabbing Based on Character Count
      9. 10.8. Displaying Remaining Character Count
      10. 10.9. Constraining Text Input to Specific Characters
      11. 10.10. Submitting a Form Using Ajax
      12. 10.11. Validating Forms
    16. 11. HTML Form Enhancements with Plugins
      1. Introduction
      2. 11.1. Validating Forms
      3. 11.2. Creating Masked Input Fields
      4. 11.3. Autocompleting Text Fields
      5. 11.4. Selecting a Range of Values
      6. 11.5. Entering a Range-Constrained Value
      7. 11.6. Uploading Files in the Background
      8. 11.7. Limiting the Length of Text Inputs
      9. 11.8. Displaying Labels Above Input Fields
      10. 11.9. Growing an Input with Its Content
      11. 11.10. Choosing a Date
    17. 12. jQuery Plugins
      1. Introduction
      2. 12.1. Where Do You Find jQuery Plugins?
      3. 12.2. When Should You Write a jQuery Plugin?
      4. 12.3. Writing Your First jQuery Plugin
      5. 12.4. Passing Options into Your Plugin
      6. 12.5. Using the $ Shortcut in Your Plugin
      7. 12.6. Including Private Functions in Your Plugin
      8. 12.7. Supporting the Metadata Plugin
      9. 12.8. Adding a Static Function to Your Plugin
      10. 12.9. Unit Testing Your Plugin with QUnit
    18. 13. Interface Components from Scratch
      1. Introduction
      2. 13.1. Creating Custom Tool Tips
      3. 13.2. Navigating with a File-Tree Expander
      4. 13.3. Expanding an Accordion
      5. 13.4. Tabbing Through a Document
      6. 13.5. Displaying a Simple Modal Window
      7. 13.6. Building Drop-Down Menus
      8. 13.7. Cross-Fading Rotating Images
      9. 13.8. Sliding Panels
    19. 14. User Interfaces with jQuery UI
      1. Introduction
      2. 14.1. Including the Entire jQuery UI Suite
      3. 14.2. Including an Individual jQuery UI Plugin or Two
      4. 14.3. Initializing a jQuery UI Plugin with Default Options
      5. 14.4. Initializing a jQuery UI Plugin with Custom Options
      6. 14.5. Creating Your Very Own jQuery UI Plugin Defaults
      7. 14.6. Getting and Setting jQuery UI Plugin Options
      8. 14.7. Calling jQuery UI Plugin Methods
      9. 14.8. Handling jQuery UI Plugin Events
      10. 14.9. Destroying a jQuery UI Plugin
      11. 14.10. Creating a jQuery UI Music Player
    20. 15. jQuery UI Theming
      1. Introduction
      2. 15.1. Styling jQuery UI Widgets with ThemeRoller
      3. 15.2. Overriding jQuery UI Layout and Theme Styles
      4. 15.3. Applying a Theme to Non-jQuery UI Components
      5. 15.4. Referencing Multiple Themes on a Single Page
      6. 15.5. Appendix: Additional CSS Resources
    21. 16. jQuery, Ajax, Data Formats: HTML, XML, JSON, JSONP
      1. Introduction
      2. 16.1. jQuery and Ajax
      3. 16.2. Using Ajax on Your Whole Site
      4. 16.3. Using Simple Ajax with User Feedback
      5. 16.4. Using Ajax Shortcuts and Data Types
      6. 16.5. Using HTML Fragments and jQuery
      7. 16.6. Converting XML to DOM
      8. 16.7. Creating JSON
      9. 16.8. Parsing JSON
      10. 16.9. Using jQuery and JSONP
    22. 17. Using jQuery in Large Projects
      1. Introduction
      2. 17.1. Using Client-Side Storage
      3. 17.2. Saving Application State for a Single Session
      4. 17.3. Saving Application State Between Sessions
      5. 17.4. Using a JavaScript Template Engine
      6. 17.5. Queuing Ajax Requests
      7. 17.6. Dealing with Ajax and the Back Button
      8. 17.7. Putting JavaScript at the End of a Page
    23. 18. Unit Testing
      1. Introduction
      2. 18.1. Automating Unit Testing
      3. 18.2. Asserting Results
      4. 18.3. Testing Synchronous Callbacks
      5. 18.4. Testing Asynchronous Callbacks
      6. 18.5. Testing User Actions
      7. 18.6. Keeping Tests Atomic
      8. 18.7. Grouping Tests
      9. 18.8. Selecting Tests to Run
    24. Index
    25. Colophon
    26. SPECIAL OFFER: Upgrade this ebook with O’Reilly
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15.2. Overriding jQuery UI Layout and Theme Styles

Problem

The customized (or standard gallery) theme you created in ThemeRoller, downloaded, and referenced in your project is a partial match to your target design but doesn’t match exactly. You need to modify the styles, but at the same time you want to ensure that edits to these styles don’t make it difficult for you to upgrade to newer versions of jQuery UI scripts and CSS.

Solution

Create custom override styles, scoped to the components that need additional non-ThemeRoller styling, and structure them so that they don’t conflict with or overwrite any standard jQuery UI CSS files.

Note

The following recipe makes the following assumptions:

  • You have a basic knowledge of how CSS works and, specifically, how styles cascade, take precedence, and can be scoped using selector classes, IDs, or elements. (For our recommended resources, please refer to the Appendix at the end of this chapter.)

  • You’re already familiar with how to create and edit a theme using ThemeRoller. (If not, review Recipe 15.1, which describes in detail how to create a theme and apply it to your pages.)

Each jQuery UI widget is styled to work out of the box when you download the jQuery UI scripts and a theme stylesheet; no changes to the CSS are necessary to incorporate the widget or styles into your site. But it’s possible that the styling may not exactly match the design conventions established in your project. For example, you may want to reduce the padding or use a custom ...

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