BioJS is an open-source project whose main objective is the interactive visualization of biological data on the web using JavaScript. BioJS develops and provides a library of ready-to-use components designed to have a very simple configuration and installation. The components can be used as building blocks for more complex visualization applications. The JavaScript-based components are browser independent and easy to integrate in web applications regardless the programming language of the server side. Since its launch in 2013 BioJS has expanded its community and currently has hundreds of users coming from both industry and academia institutions. Some of the major contributors include Biosof, CALIPHO group at SIB Swiss Institute of Bioinformatics, eLife Sciences, EMBL-EBI, Florida State University, Intermine, Lewis Lab at Berkeley Lab, Max Planck Institute for Molecular Genetics, Max Planck Institute of Biochemistry, Bryn Mawr College, RostLab at TUM, The Cambridge Usability Group, The Genome Analysis Centre, University of Cape Town, Universidade de Caxias do Sul, Université de Lyon and University of Toronto.