Inside Wijmo 5, a Large-scale JavaScript Product

Inside Wijmo 5
A Large-scale JavaScript Product

Chris Bannon
Product Manager, Wijmo

What is Wijmo 5?
 JavaScript UI Controls
 Zero dependencies
 Specialize in data grids and charts
 Includes the famous FlexGrid control
 Focus on performance
 Small core controls and extensible
 Offer additional features as optional extensions

Wijmo Stats
 Distributed Team
 US, Brazil, Canada, Russia, China, India, Myanmar, Japan
 Over 100,000 lines of code (just in Wijmo 5, millions company-wide)
 Over 25 years of experience (first control written in VB)
 Our FlexGrid control can data-bind 1,000,000 records in under 1 second

What Makes Wijmo 5 Special?
 True Controls (Control Classes like in .NET)
 Not Widgets
Control
//Initialize
var myFlexGrid = new wijmo.grid.FlexGrid('#myFlexGrid');
//Show Row Headers
myFlexGrid.headersVisibility = wijmo.grid.HeadersVisibility.All;
Widget
//Initialize
$('#mywijgrid').wijgrid();
//Show Row Headers
$('#mywijgrid').wijgrid('option', 'showRowHeader', true);

Wijmo 5: Architecture
Core
wijmo.js/css
FlexGrid
wijmo.grid.js
FlexChart
wijmo.chart.js
Gauge
wijmo.gauge.js
Input
wijmo.input.js
More to come...
Interop
wijmo.angular.js
Event
CollectionView
Control
Globalize
Styles
Directives
<wj-flex-grid>
<wj-flex-grid-column>
…
FlexGrid Filter
wijmo.grid.filter.js
FlexGrid GroupPanel
wijmo.grid.groupanel.js
FlexGrid DetailRow
wijmo.grid.detail.js
Extensions
FlexChart Analytics
wijmo.chart.analytics.js
FlexChart Annotation
wijmo.chart.annotation.js
FlexChart Interaction
wijmo.chart.interaction.js

Our Tools
 Visual Studio
 TypeScript
 AngularJS
 Bootstrap
 Browser Dev Tools
 BrowserStack

Visual Studio Project Setup
 Visual Studio Project for Control Library
 Folders for Namespaces
 TypeScript files for Classes
 Builds like a standard VS PRoject

Sample Setup
 Each Sample has a VS Solution and Project
 Solution contains
 Sample Project
 Wijmo 5 Project
 Wijmo 5 source is compiled when sample is
run
 Wijmo 5 source can be debugged when
running samples

Debugging Source Code in Visual Studio

Builds
 TFS used for Source Control
 Nightly Builds
 Use MSBuild tasks
 Compile TypeScript
 Add headers/license/copyright to files
 Run Unit Tests
 Build passes/fails based on Unit Tests

TypeScript
 Language from Microsoft
 Created by Anders Hejlsberg, the creator of C#
 Object-oriented with Classes etc.
 Compiles to JavaScript (ES5 or ES6)
 Offers C#-like syntax and features
 Inheritance
 Type safety, design-time error checking
 Based on ECMAScript standards (ES 6)
 Adopted by Google in Angular 2

Wijmo Uses TypeScript
 Our Source Code is all written in TypeScript
 Our developers can apply their C# experience and skill to JS
 We can structure our control library like we would in C#
 Base Control Class
 UI Controls that inherit Base Control Class
 We get C# features when developing
 IntelliSense (autocomplete) in Visual Studio
 Error warnings while programming (no need to wait until runtime to see errors)
 Our controls are extensible
 We can extend our controls easily to add features as extension Classes (like FlexGridFilter)

AngularJS
 MVVM Framework
 Similar to .NET/XAML in JavaScript
 Two-way binding
 Components

Wijmo Supports AngularJS
 We create AngularJS directives for each of our JavaScript Controls
 Our directives support two-way bindings for properties that benefit from it
 We offer templates to make declaring controls even richer (like Cell Templates in
FlexGrid)
 Many of our samples are created with AngularJS
 It is really nice to declare Controls using markup

Bootstrap
 Mobile-first UI framework
 Building blocks for UI
 Forms (Input, Buttons, etc.)
 Navigation
 Layout (Responsive)
 Icons
 Easy way to jump-start UI for an application

Wijmo Likes Bootstrap
 Our default theme matches Bootstrap
 We use Bootstrap in our Samples
 Layout
 Navigation
 Simple UI (buttons, tabs, etc.)
 Using Bootstrap for simple stuff allows us to focus
on the complicated UI controls like Grids/Charts

Browser Dev Tools
 Spend a lot of our time in Dev Tools
 Inspecting Elements
 Stepping through code
 Profiling for performance
 Memory profiling (for leaks)
 FPS monitoring (preventing jank)
 Emulating devices

Browser Stack
 Web-based Cross-device testing
 Test any browser, on any device, running any
OS
 Ideal to quickly confirm issues/fixes in
environments you don’t have setup
 Can also easily connect to localhost (with perf
cost)
 Covers most needs for testing
 Not ideal for debugging
 Not ideal for testing performance issues since
it is an emulation across web

Thanks
 http://wijmo.com
 https://www.visualstudio.com/en-us/visual-studio-homepage-vs.aspx
 http://www.typescriptlang.org/
 https://angularjs.org/
 http://getbootstrap.com/
 https://developer.mozilla.org/en-US/Learn/Discover_browser_developer_tools
 https://www.browserstack.com/

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