Its worth remembering that the conflict might not be to the company's activities, but rather, to activities performed for a client. Some clients may be substant

Its worth remembering that the conflict might not be to the company's activities, but rather, to activities performed for a client. Some clients may be substantially upset if they feel that they have paid for development, to have that development later released as open-source. Of course there would be no reason to assume Chart.js reuses client's code, and the developer not have even worked on any projects with the company yet, but the challenges of convincing a client might not be worth the stress.