Abstract: This disclosure relates to systems and methods for preloading content on a user device before a user requests the content from a web service provider. The preloaded content may be selected based, at least in part, upon the user's browsing and purchasing history. The web service provider may preload the content to minimize user idle time when interfacing with a web site. The web service provider may determine when to send the preloaded content based, at least in part, on when the user device is likely to connect to the network and/or when the user is likely to use the device to interface with the web service provider.

Abstract: An asynchronous dependency resolution system receives a request to store a first application component in an application repository, stores a first dependency map for the first application component in a dependency repository, and generates a first executable bundle for the first application component. The asynchronous dependency resolution system determines that the dependency repository comprises a first association between the first application component and a second application component, where the first application component is a dependency of a second application component, obtains source code for the second application component, and generates a second executable bundle for the second application component using the source code for the first and second application components.

Abstract: Described herein are systems and methods for automatically verifying layout of content such as web pages, e-books, and so forth which comprise a markup language. The content is rendered in a headless browser without presentation to a display to generate a document object model (“DOM”) for the content. The DOM is used to generate a DOM vector array which may be analyzed to determine layout errors such as blocks of content overlaying one another, improper placement of critical elements, and so forth.

Abstract: This disclosure relates to systems and methods for preloading content on a user device before a user requests the content from a web service provider. The preloaded content may be selected based, at least in part, upon the user's browsing and purchasing history. The web service provider may preload the content to minimize user idle time when interfacing with a web site. The web service provider may determine when to send the preloaded content based, at least in part, on when the user device is likely to connect to the network and/or when the user is likely to use the device to interface with the web service provider.