using the method described at https://fontawesome.com/how-to-use/on-the-web/using-with/sass I believe I will end up accumulating almost 2.8MB of web fonts in the src folder of my React project. I need to use CSS to add icons to a calendar style, but won't that affect tree shaking? In other words, won't I end up with a huge package size just for using a single icon?
The method @Mike Poole presented is the most correct one for tree shaking. If you use the webfont method, you have no option but to load the entire set. But if you need to use just a few icons, and can't load 'em via js for some reason, you can simply get the svg files you need and add them directly, as either <img> tags or background-images.