Dash is an application framework for creating interactive analytical interfaces that run in a web browser. It is particularly useful where a conventional website needs to expose data, calculations or visualisations through a set of controls rather than through static reports.
Developers define the visible layout and separately describe how outputs respond to user input. This distinction makes interactive workflows easier to reason about, while leaving room to integrate existing data-processing code. Dash applications can range from focused internal tools to larger multipage portals used by teams and customers.
Unlike a general-purpose content framework, Dash makes the relationship between inputs and analytical outputs a first-class development concern. A filter, date selector or selected chart region can drive multiple other elements on the page, making it useful for exploratory reporting and operational monitoring.
This is free and open source software.
Key Features
- Declarative layout built from HTML elements, controls and reusable components.
- Callbacks connect component inputs and state to outputs without manually wiring browser events.
- Interactive Plotly charts support selections, zooming, hovering and filtering.
- Pattern-matching callbacks can respond to dynamically created components.
- Client-side callbacks support interactions that do not need a server round trip.
- Multipage applications use page registration and navigation facilities.
- Background callbacks accommodate tasks that take longer than an ordinary request.
- Data tables and third-party components extend analytical interfaces.
- Server-side endpoints and integration with existing services are available through its underlying web stack.
- Development tools help inspect callbacks and diagnose application behaviour.
- Callback state distinguishes values used by an operation from those that trigger it.
- Component loading states help users understand when analytical updates are pending.
- Persistence options can retain selected control values across sessions or refreshes.
Website: plotly.com/dash
Support:
Developer: Plotly
License: MIT License
Dash is written in Python. Learn Python with our recommended free books and free tutorials.
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