Rete.js 
JavaScript framework for visual programming
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#RussiaInvadedUkraine on 24 of February 2022, at 5.00 AM the armed forces of the Russian Federation attacked Ukraine. Please, Stand with Ukraine, stay tuned for updates on Ukraine’s official sources and channels in English and support Ukraine in its fight for freedom and democracy in Europe.
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Introduction
Rete is a modular framework for visual programming. Rete allows you to create node-based editor directly in the browser. You can define nodes and workers that allow users to create instructions for processing data in your editor without a single line of code.
Documentation
Check the docs and learn about the components and capabilities.