September 2017
Intermediate to advanced
450 pages
11h 24m
English
Angular 4 also depends on a number of other JavaScript libraries to function; some of those libraries are peerDependencies within Angular's own dependencies. That means that they must be fulfilled by your application in order for Angular to function. Some of these dependencies, such as TypeScript, were actually provided in the NPM install command; however, some of them, such as Zone.js, are not. These peerDependencies can vary even between minor version differences of Angular, so if you do see one of these warnings, your best bet is to manually update your package.json dependency for that library and try again:
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