December 2018
Intermediate to advanced
642 pages
15h 5m
English
Content preview from Modern JavaScript Web Development Cookbook
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Working with libraries
Today, it's highly likely that any project you create will depend on third-party libraries, and it's very likely that those weren't written with Flow. By default, Flow will ignore these libraries and won't do any type checking. This means that any data type errors you might commit when using the library will be unrecognized, and you'll have to deal with them in the old-fashioned way, through testing and debugging—a throwback to worse times!
To solve this problem, Flow lets you work with library definitions (libdefs) (see https://flow.org/en/docs/libdefs/) that describe the data types, interfaces, or classes for a library, separately from the library itself, like header files in C++ and other languages. Libdefs are
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.