What sets apart `tsc --build --clean` from `rm -rf *.js` command?

I'm curious about the tsc command with the arguments --build --clean, which is used to clean/remove the generated .js files from the Transpiler (tsc).

What makes this command special or significant? If I simply need to delete all the .js files, I can easily do so using rm -rf *.js or del *.js in the directory.

Is there anything important missing from my understanding that someone could explain?

Answer №1

One key distinction is that the rm command will delete any files, regardless of whether or not they were created through transpiling TypeScript.

Note:

When using tsc --build --clean, only .js files associated with existing .ts files will be deleted. This means that renaming, deleting, or adding new .ts files and then running tsc --build --clean may result in older .js files without corresponding .ts files not being removed .

If you wish to clean up before a build, especially after modifying the set of .ts files, it is recommended to delete your output folder using alternative methods. For instance, you could use rm -rf dist/ in a Unix shell or rm -r -fo dist/ in Windows PowerShell. Alternatively, if you are working with Node.js alongside TypeScript, consider utilizing a cross-platform tool like rimraf for deleting your output folder.

Answer №2

In most cases, using --clean is not effective. Whenever you change the name, location, or delete a source file, the clean option will not properly remove the transpiled output.

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