BoxFnOnce is used at run time in 53 crates (of which 8 optionally). It is a direct run-time dependency in 4 crates.

Depender (with downloads and own rev deps) BoxFnOnce version
800 15 web-view ^0.1
better-web-view ^0.1
tauri-web-view ^0.1
swear ^0.1.0