Differences and relationships among NPM, Yran and NPX

npm And yarn The difference between

difference	npm	yran
Installation mode	You need to wait for the end of the previous installation task before executing the next	Perform multiple installation tasks at the same time
Offline installation	Download again from the network	If the package has been installed , Will take priority from it
edition	Download the latest and most stable from the network by default , Version locking can be achieved through commands	There is one by default yarn.lock File lock version , Make sure the environment is unified
Install the output	Output information redundancy	Output less information
Download and install	stay  node.js Recommended on the official website LTS ( Long term support ) edition	npm install -g yarn
View version	Command line node -v see node Installation version of . incidentally  npm -v  see npm Version number of .	yarn --version

summary

1,npm Slow download speed , Even if it's new install Yes, the speed is still slow ,yarn Be quick

2,npm The packages installed by the same project cannot be consistent ,yarn Version lock

3,npm When downloading multiple packages, the download error of a single package will be thrown out and continue to download the next package ,yran Intuitive print installation information

npx?

npx yes npm Advanced version of , With more powerful functions

• Run instructions directly in the project , Direct operation node_modules An instruction in , There is no need to enter the file path

  node-modules/.bin/babel.js --version
  npx babel --version

• Avoid global installation of modules ：npx Temporarily install a module , Delete this module after use ( The following two modules do not need to be installed globally )

  npx babel my-react-app
  npx [email protected] main.js -o ./dist/main.js

• Use different versions of commands , Use local or downloaded commands

  npx --no-install http-server #  Must use local  http-server（ If there is no local error report ）
  npx --ignore-existing create-react-app my-react-app #  Ignore locally installed packages , Directly use the downloaded package 
  npx [email protected] -v # Commands for using a specific version of the package 

  Parameters

• -p After downloading a module , Run the command （ The command must be downloaded , Similar to channel character ）

  npx -p [email protected] node -v 
  npx -p A -p B [command]

  github

• You can execute the code in the warehouse , The remote code must be a module , That is, it must contain package.json And entry scripts

  npx github:piuccio/cowsay hello