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Index
Opa: Up and Running Preface
What Is Opa? How Do I Work with Opa? Conventions Used in This Book Using Code Examples Safari® Books Online How to Contact Us Acknowledgments
I. Coding a Mini Wikipedia
1. First Steps: Getting to Know Opa
Installing Opa
Installing Node.js Auto-Installing MongoDB
Our First Program
Writing and Running the Code What localhost:8080 Means What the Code Means What Happens When We Run Your Application Details About the Opa Runtime
Toward Real Programs Battle Plan Summary
2. Opa Fundamentals
Primitive Values Dynamic Content Records Introduction to Types, and More About Records A Brief Introduction to Variants Functions: Building Blocks Functional Programming Functional + Typed Summary
3. Servers, Resources, and URLs
Web Resources Embedding (Static) Resources Serving Resources Constructing (Dynamic) Resources URL Dispatching Summary
4. Data Storage
CRUD (Create, Read, Update, and Delete) Maps (Dictionaries) Summary
5. Building the UI in HTML and CSS
HTML Markup
Tags and Attributes Inserts Event Handlers DOM Manipulation Example: A Guessing Game
The Wiki Interface (HTML)
HTML Plumbing Markdown Dynamically Updating the Page
Adding Style (CSS)
Explicit Style Attributes Opa-Powered Style External CSS Wiki with Style
Bootstrap: Nice, Out-of-the-Box Styling Working with Designers
How Should I Use the DOM Structure? Can You Describe Your Development Environment? How Should I Write CSS with Opa? Which Tools Should I Use to Write CSS? How Do I Improve the CSS Workflow in Opa? How Often Should Developers and Designers Interact? What Should Developers Know About CSS? What Should Designers Know About Opa? Can You Provide Some Tips for Quickly Customizing Your App’s Bootstrap-Based UI?
Summary
II. Coding a Mini-Twitter
6. The Web Chat App
Starting a New Project View: Building User Interface Model: Application Logic Connecting the Model and the View
Showing New Messages Broadcasting the Current User’s Messages Connecting Everything
Understanding Networks Exercises
Customizing the Display Saying “Hello” Distinguishing Messages Between Users User Customization And Beyond
7. More Advanced Features of Opa
Learning More About Types
Variant Types Pattern Matching Polymorphic Types Recursive Types
Recursive Functions What About Loops? Bigger Projects Packages Summary
8. User Management
Setting Up the View Bootstrap Widgets: Modal Windows Form Handling in Opa: Registration Form
Alerts
Modeling and Adding Users Account Creation Notification: Sending Emails Activating a User Account Without an Activation Email Account Activation: URL Data Handling Keeping Track of Logged-In User: Handling User Associated Data The User’s Top-Bar Menu Exercise Summary
9. Building Reactive UIs: New Messages with a Real-Time Preview
Parsing
Parsing Expressions
Modeling Messages Rendering Messages Reactive UI: Live Preview Summary
10. Data Storage and Querying: Storing and Fetching Relevant Messages
Collections in Opa: Lists, Sets, and Maps Declaring Data Inserting/Updating Data Reading (and Querying) Data
Projections
Data Manipulations in Birdy
Database Declaration Storing New Messages Fetching Relevant Messages User and Topic Pages Following Users and Topics Following Users Following Topics Follow Button
Exercise Summary
About the Authors Colophon Copyright
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