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Dynamically Modify the Query, Initial Selection, and Widgets with Bindings
Compared to facets, bindings are more programmatic, and provide more ways to specify interactions. Bindings can dynamically modify a query, set an initial filter selection, or change a widget’s appearance. For example, you can change the measure in a query based on a selection in a custom query. You can initially filter a region-based dashboard based on the country of the logged-in user. Or, you can change the color of the metric in a number widget based on whether its value is high, medium, or low. Each binding is unidirectional, meaning it affects other queries, but other queries don’t affect it.
For more information about bindings, see Analytics Interactions Developer Guide

