Book Image

Visualforce Development Cookbook - Second Edition

By : Keir Bowden
Book Image

Visualforce Development Cookbook - Second Edition

By: Keir Bowden

Overview of this book

Visualforce is a framework that allows developers to build sophisticated, custom user interfaces that can be hosted natively on the Force.com platform. The Visualforce framework includes a tag-based markup language, similar to HTML that is used to write the Visualforce pages and a set of controllers that are used to write business logic to the Visualforce pages. Visualforce Development Cookbook provides solutions to a variety of challenges faced by Salesforce developers and demonstrates how easy it is to build rich, interactive pages using Visualforce. Whether you are looking to make a minor addition to the standard page functionality or override it completely, this book will provide you with the help you require throughout. You will start by learning about the simple utilities and will build up to more advanced techniques for data visualization and to reuse functionality. You will learn how to perform various tasks such as creating multiple records from a single page, visualizing data as charts, using JavaScript to enhance client-side functionality, building a public website, and making data available to a mobile device. With an interesting chapter on tackling common issues faced while developing Visualforce pages, the book provides lots of practical examples to enhance and extend your Salesforce user interface.
Table of Contents (16 chapters)
Visualforce Development Cookbook - Second Edition
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface

Lightning forms


Visualforce applications that maintain state across multiple requests to the server utilize the viewstate, which may be up to 135 Kb in size. The viewstate can be a significant resource for mobile devices to manage as they typically have a reduced memory footprint compared to desktop devices. The viewstate must also be sent with every HTTP request to the server, which over a 3G/4G network can be slow and expensive in terms of data plan usage.

Visualforce pages intended for Salesforce1 should make use of JavaScript remoting, as detailed in the JavaScript remoting recipe in Chapter 7, Enhancing the Client with JavaScript. These server calls are stateless (so the request only contains the data items that the server needs for the specific action), and take place via AJAX, which is a more performant protocol and doesn't require a full page reload for the server response.

Using Visualforce remoting is not without its downsides though - JavaScript code must be developed to extract...