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  • Book Overview & Buying Ext JS Application Development Blueprints
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Ext JS Application Development Blueprints

Ext JS Application Development Blueprints

By : Colin Ramsay
4 (1)
Buy this Book
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Ext JS Application Development Blueprints

Ext JS Application Development Blueprints

4 (1)
By: Colin Ramsay
Buy this Book

Overview of this book

If you are a developer who has knowledge of Ext JS but would like to expand it to encompass the bigger picture of application development, then this book is ideal for you.
Table of Contents (13 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
Lock Free Chapter
1
1. Introduction
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1. Introduction
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Humble beginnings
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What is application architecture?
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Ext JS
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Getting ready
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In safe hands
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Summary
2
2. MVC and MVVM
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2. MVC and MVVM
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Diary of always
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Bringing MVC to the Web
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Ext JS and MVC
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How does it help your application
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MVC and the illusion of choice
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Introducing MVVM
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An event domain example
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Summary
3
3. Application Structure
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3. Application Structure
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Ideas for structure
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Getting to know your application
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Cultivating your code
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The solution to pollution
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Summary – mind your own beeswax
4
4. Sencha Cmd
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4. Sencha Cmd
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What is Sencha Cmd?
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Why is it important?
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Setting up your application
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The generation game
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Develop in style
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Care for the environment
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Before the build
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Code complete
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The best of the rest
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Summary
5
5. Practical – a CMS Application
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5. Practical – a CMS Application
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A content-managed system
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The requirements
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Starting at the bottom
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Work your way up
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Where the wild things are
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The real deal
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Creating a structure
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Data-driven design
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A room with a view
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Summary
6
6. Practical – Monitoring Dashboard
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6. Practical – Monitoring Dashboard
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Application design
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Requirements
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Data structure
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The view from the top
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Flexibility and pragmatism
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Does this hurt?
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Onwards and upwards
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Data first
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Storing the data
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With a view to a controller
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The main view controller
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The dashboard
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The dashboard view model
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The dashboard view controller
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Web logs subpage
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A view on the Web
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Controlling the Web
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More and more subpages
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Summary
7
7. Practical – an E-mail Client
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7. Practical – an E-mail Client
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Form factors
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Application design
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I require to admire
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Responding to the situation
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Input required
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A view to a thrill
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Application state
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A binding agreement
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An eventful application
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Coding – it's been a long time
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It's under control
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Login view
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Main force
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The head of the family
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Unravel the thread
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I am the best message
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A composed finish
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Deciding on a theme
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Summary
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8. Practical – Questionnaire Component
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8. Practical – Questionnaire Component
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Application design – my way
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Data structure
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Data flow
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Sketchy sketching
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Get set
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The data layer
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The payload
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The wizard component
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One step forward
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Making progress
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Step by step
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Questionnaire command and control
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The wizard model
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A delightful host
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Mixin the night away
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Summary
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9. A Shopping Application
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9. A Shopping Application
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About the app
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Back to Ext JS
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The data layer
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Component interaction
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The simplicity of view models
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Code, code, and more code
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Interface in your face
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Categorically speaking
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Product placement
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A basket case
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The account window
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Summary
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10. Debugging and Performance
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10. Debugging and Performance
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In-browser debugging
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Breaking and busting
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Performance in Ext JS
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Quick on the draw
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Analyzing performance
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Summary
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11. Application Testing
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11. Application Testing
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Total testing
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Testing tool time with Jasmine
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Testing with robots
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Testability
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Faking it with mocks
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Continuous coverage
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Summary
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Index
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Index

Analyzing performance

Dealing with performance issues is initially a problem of intelligence gathering. There can be multiple reasons why an application feels slow, and the feedback of users often doesn't help. Describing a part of the app as "sticky" just isn't a great way to diagnose the root cause. We need to get firm facts and figures in front of us before we can hope to find a solution. While we'll look at metrics such as rendering and response times, there are many considerations that must be taken into account, such as memory usage and user perception. These topics are left as an exercise for the reader.

The Chrome Developer Tools come to the rescue again. This time, we'll look at two main features that help diagnose performance problems: profiles and the timeline.

Note

In general, there are two situations in which Ext JS applications feel slow: poor design decisions and over-complicated apps. Having said that, these techniques are invaluable when the problem...

CONTINUE READING
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Programming languages
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