Application note: an open-source JavaScript library to simulate dairy cows and young stock, their growth, requirements and diets

A free open-source JavaScript library for dairy herd simulation was developed and is available in a public repository. The library called dairy.js is part of SOLID-DSS, a decision support system for low-input dairy farms, but can be used independently for any agricultural web-based decision support or modeling purposes. The library covers the most important routines to describe relevant properties of dairy cow herds and individual cows ranging from herd structure simulation to diet optimization. The library, examples and source code are available at https://github.com/jvail/dairy.js.