Spreadsheet-style reactive web interfaces with Flare

In plain words

Flare is a UI library for PureScript that combines user interface design and program logic into single expressions. It is designed for developers building simple web applications who want to define interactive elements and their behavior simultaneously. The library enables spreadsheet-style reactive interfaces where inputs and outputs are tightly integrated, allowing for concise code that is easy to reason about.

written from the facts on this page · September 2026

From the sources

Flare is a special-purpose UI library for Purescript. The idea is to define the user interface and the logic of the program at the same time. On the one hand this approach somewhat limits the number of use cases, but on the other hand this allows for a remarkable expressiveness. Imagine you want to build a really simple web application that calculates the product a × b for two numbers a and b which can be entered by the user. Using Flare, we define the user interface and the program logic in a single expression: How does this work? Flare defines the function int that takes two arguments: a label and an initial value 2 . An expression like int "a" 6 serves two purposes. It creates the…from david-peter.de

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