How to safely update your packages.json
A tip that could save us from unexpected issues in future: try to not manually touch or even delete yarn.lock AND package.json (in the ideal case)
- to add new dep:
yarn add foo | yarn add --dev foo | yarn add --peer foo - to remove:
yarn remove dep - to upgrade / bump to a new version:
yarn upgrade foo | yarn upgrade foo@1.2.3 - to see outdated stuff:
yarn outdated
Lockfile should be changed only through its "interface" to achieve the main point of Yarn – "deterministic builds".
Also in 99% of cases it's not necessary to rm -rf node_modules/ if you didn't do anything low-level like manually added symlinks inside, just yarn after switching to a new branch should be enough.
The easiest way to keep your Yarn up to date (it's important in some cases) is to have it installed with homebrew: brew install yarn --without-node and then brew update && brew upgrade from time to time.
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