7. Dart and JavaScript Interoperation | Mastering DART

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Mastering DART

By : Sergey Akopkokhyants

4.6 (5)

Mastering DART

4.6 (5)

By: Sergey Akopkokhyants

Overview of this book

If you are an application developer who has experience with Dart and want to develop reusable and robust code in Dart, then this book is for you. You are expected to have a basic knowledge of core elements and applications.

Preface

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

1. Beyond Dart's Basics

1. Beyond Dart's Basics

Modularity and a namespace

Functions and closures in different scopes

Classes and mixins

Methods and operators

Summary

2. Advanced Techniques and Reflection

2. Advanced Techniques and Reflection

Generics

Errors versus exceptions

Annotations

Reflection

Summary

3. Object Creation

3. Object Creation

Creating an object

Summary

4. Asynchronous Programming

4. Asynchronous Programming

Call-stack architectures versus event-driven architectures

Future

Zones

Isolates

Summary

5. The Stream Framework

5. The Stream Framework

Why you should use streams

Single-subscription streams versus broadcast streams

An overview of the stream framework API

Summary

6. The Collection Framework

6. The Collection Framework

A Dart collection framework

Ordering of elements

Collections and generics

The collection class hierarchy

The Iterable interface

The Iterable interface

BidirectionalIterator

The collection classes

Unmodifiable collections

Choosing the right collection

Summary

7. Dart and JavaScript Interoperation

7. Dart and JavaScript Interoperation

Interoperation at a glance

The dart:js library

Type conversion

JsObject and instantiation

JsFunction and the this keyword

Dart with jQuery

Summary

8. Internalization and Localization

8. Internalization and Localization

The key principles

The Intl library

Internationalizing your web application

Extracting messages

Using Google Translator Toolkit

Using translated messages

Summary

9. Client-to-server Communication

9. Client-to-server Communication

Communication at a glance

Hypertext Transfer Protocol

AJAX polling request

AJAX long polling request

WebSocket

Summary

10. Advanced Storage

10. Advanced Storage

Cookies

Web Storage

Web SQL

IndexedDB

Summary

11. Supporting Other HTML5 Features

11. Supporting Other HTML5 Features

The notification APIs

The native drag-and-drop APIs

The geolocation APIs

Canvas

Summary

12. Security Aspects

12. Security Aspects

Web security

Securing a server

Securing a client

Security best practices

Summary

Index

Index

Dart with jQuery

There is no doubt that jQuery has become very popular among developers because of its simplicity. Let's try to combine the simplicity of jQuery and the power of Dart in a real example. For demonstration purposes, we created the js_proxy package to help the Dart code to communicate with jQuery. It is available on the pub manager at https://pub.dartlang.org/packages/js_proxy. This package is layered on dart:js and has a library of the same name and sole class JProxy. An instance of the JProxy class can be created via the generative constructor where we can specify the optional reference on the proxied JsObject:

JProxy([this._object]);

We can create an instance of JProxy with a named constructor and provide the name of the JavaScript object accessible through the dart:js context as follows:

JProxy.fromContext(String name) {
  _object = js.context[name];
  }

The JProxy instance keeps the reference on the proxied JsObject class and makes all the manipulation on it, as shown in the...

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