We present PolyChrome, an application framework for creating web-based collaborative visualizations that can span multiple devices. The framework supports (1) co-browsing new web applications as well as legacy websites with no migration costs (i.e., a distributed web browser); (2) an API to develop new web applications that can synchronize the UI state on multiple devices to support synchronous and asynchronous collaboration; and (3) maintenance of state and input events on a server to handle common issues with distributed applications such as consistency management, conflict resolution, and undo operations. We describe PolyChrome's general design, architecture, and implementation followed by application examples showcasing collaborative web visualizations created using the framework. Finally, we present performance results that suggest that PolyChrome adds minimal overhead compared to single-device applications.
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Badam et al. (2014) studied this question.
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