Yarn Introduction

Yarn by Facebook, Google, Exponent and Tilde jointly launched a new JS package management tool, it is mainly to make up for some shortcomings of the emergence of npm. And npm, it has the following characteristics:

Speed: mainly from the following two aspects:

Parallel installation: parallel execution of all tasks, improving performance.
Offline mode: directly from the cache if a package has been previously installed, install again.

Installation unified version: Every time when pulling the same project dependencies, module versions are the same use.
More concise output: the Yarn combines intuitive and emoji directly print out the necessary information, but also provides commands for developers to query additional installation information.
Multi-source registration process: all dependencies, when no matter how many times he was quoted indirectly associated with different libraries, install this package, only from a registered source to install either npm either bower, to prevent inconsistencies confusion.
Better semantics: the Yarn command npm changed some names, such as yarn add / remove, to feel more clearly than the original npm install / uninstall.

Installation Yarn

In the case of the npm installed, it can be used directly to install npm yarn

npm install -g yarn

Enter yarn -v, correctly displays the version number of the installation was successful. If you want to manually install, you can refer directly to the official document: https://yarnpkg.com/zh-Hans/docs/install

In addition, because Fangxiao Zhang divinity, leading to foreign websites may from time to time drifted on Mars. At this point you can use Taobao to accelerate download mirror:

yarn config set registry https://registry.npm.taobao.org

Use Yarn

yarn and command npm almost, specifically refer to the official documentation: https://yarnpkg.com/zh-Hans/docs . Here is a list about common commands.

asl	Yarn	Explanation
nPM heat	yarn init	Initialization package development environment
npm install	yarn install	Installation package definition file all dependent
npm install xxx —save	yarn add xxx	Install a dependent, saved by default in the package
npm uninstall xxx —save	yarn remove xxx	Remove a dependent project
npm install xxx —save-dev	yarn add xxx —dev	When you install a development project relies
npm update xxx —save	yarn upgrade xxx	Update a dependent project
npm install xxx --global	yarn global add xxx	The installation of a global dependency project
Elevation run / test	yarn run/test	Run a command

Reprinted from: https: //www.cnblogs.com/TianFang/p/10106458.html

Speed: mainly from the following two aspects:

Parallel installation: parallel execution of all tasks, improving performance.
Offline mode: directly from the cache if a package has been previously installed, install again.

Installation unified version: Every time when pulling the same project dependencies, module versions are the same use.
More concise output: the Yarn combines intuitive and emoji directly print out the necessary information, but also provides commands for developers to query additional installation information.
Multi-source registration process: all dependencies, when no matter how many times he was quoted indirectly associated with different libraries, install this package, only from a registered source to install either npm either bower, to prevent inconsistencies confusion.
Better semantics: the Yarn command npm changed some names, such as yarn add / remove, to feel more clearly than the original npm install / uninstall.