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Prettier removes all original styling and ensures that all outputted code conforms to a consistent style.

Prettier takes your code and reprints it from scratch by taking the line length into account.


For example, take the following code:

foo(arg1, arg2, arg3, arg4);

It fits in a single line so it’s going to stay as is. However, we’ve all run into this situation:##

foo(reallyLongArg(), omgSoManyParameters(), IShouldRefactorThis(), isThereSeriouslyAnotherOne());

Suddenly our previous format for calling function breaks down because this is too long. Prettier is going to do the painstaking work of reprinting it like that for you:


Prettier enforces a consistent code style (i.e. code formatting that won’t affect the AST) across your entire codebase because it disregards the original styling* by parsing it away and re-printing the parsed AST with its own rules that take the maximum line length into account, wrapping code when necessary.

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