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development Dependency

如果一个模块在运行的时候并不需要，仅仅在开发时才需要，就可以放到devDependencies中。 这样，正式打包发布时，devDependencies的包不会被包含进来。 If a module is not needed at runtime, but only at development time, it can be placed in devDependencies. This way, packages from devDependencies will not be included in the official package release.

show modules installed in global

npm list -g --depth=0

npx command

  1. 首先搜索当前目录下的node_modules
  2. 然后在全局进行搜索
  3. 临时下载一个模块，最后卸载掉

NPM NRM NVM CNPM N NPX definition

NPM node package manager NRM node registry manager NVM node version manager commen useful command: xxx --help

about nrm

npm config lsIf the node is win32 program, Then try to change a file(See the error information) const NRMRC = path.join(process.env.HOME, '.nrmrc')(Delete); const NRMRC = path.join(process.env.USERPROFILE, '.nrmrc')(New);

NVM relative command

nvm proxy http://example.com:8080 set the proxy

uninstall node.js and relative package

here is the link

remove the node_modules in current project

npm install rimraf -g rimraf node_modules

npm install

npm i [-g] [-d] [-s] i indicates install g means --global s is --save It will write the package name to the dependency in package.json d means --save-dev It will write the pacjage name to the dependency in package.json The package will be added to the node_modules dir.If there is no parameter(d|s|g)

get the command line parameter

process.argv[index] in genereal,index is greater than 1.

About package.json file

npm package name: major.minor.patch

major: New architechure.And in general, it mot be compatible with the old version minor: Add some new features as planed patch: fix some bugs

npm run script

In VUE, you can customize .env.name file to indicate the profile. So you can configure multiple environments.For instance, you can set a dev-mock file for simulation data.

yarn upgrade-interactive --latest

upgrade the package

npm package

eslint

eslint is a format tool

There is an article about the tool

prettier

format tool

tsx

Not a file format. It is a useful tool to execute the ts directly.

fp-ts

support Option syntax like Rust.

zx

Write more powerful script in commad line. But you must verify that your env support wsl.