NPM ---- install yarn

The premise of installing yarn is that npm needs to be installed first, and the environment variables are configured before it can be used.

1. Download and install

npm install yarn -g

Check the version after installation is complete:

yarn --version // 1.22.17

Second, configure Yarn

Configuration Source:

yarn config set registry https://registry.npm.taobao.org -gyarn config set sass_binary_site http://cdn.npm.taobao.org/dist/node-sass -g

Check source:

yarn config get registry // https://registry.npm.taobao.orgyarn config get sass_binary_site // http://cdn.npm.taobao.org/dist/node-sass

Three, the advantages of Yarn

yarn is a npm package management tool released by Facebook, which I personally feel very comfortable to use:

1. Security
   Yarn algorithmically checks the integrity of each package before executing code.
2. Fast speed
   Yarn caches every downloaded package, so you don't need to download it again when you use it again.Also takes advantage of parallel downloads to maximize resource utilization, so installations are faster.
3. Reliable
   Due to the mechanism of yarn.lock, the versions of dependencies in the project will be locked, so there is no need to worry about version inconsistencies during collaborative development.And npm will always download the latest dependency version for you, which is very bloody.

Fourth, some commonly used Yarn commands

yarn init // Generate package.json fileyarn install // Install all dependencies of yarn.lockyarn install --force // reinstall dependenciesyarn remove moduleName // remove dependenciesyarn add moduleName // install a dependencyyarn add moduleName --dev/-D // Install to development environmentyarn run scriptName // Execute the script command named by package.json

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