javascript

One reason I considered picking bun over deno was bun shell. Bun shell allows one to write cross-platform JavaScript & TypeScript scripts with bash-like interop. Bun shell has a growing set of built in commands: cd, ls, rm, echo, pwd, bun, cat, touch, mkdir, which, mv, exit, true, false, yes, seq, dirname, basename. When these are encountered in a statement like $`echo hi` a cross-platform execution is used. If a command is not recognized, like $`sd world planet helloWorld.ts`, the local system command is executed. This allows for writing simple cross-platform scripts and breaking out when needed.