Well, modern react is pushing folks to use the hooks model which jettisons the whole componentDidMount and other class functions. Now you use a side effect hoo

Well, modern react is pushing folks to use the hooks model which jettisons the whole componentDidMount and other class functions. Now you use a side effect hook: https://reactjs.org/docs/hooks-effect.html https://reactjs.org/docs/hooks-effect.html This is a little more clear that it's for side effects of the component being put in the DOM, but it does require a bit more knowledge of react and hooks.