Gyumeijie

Assumme that we have already installed babel-cli command using `npm install --global babel-cli`.

1. Configuration .babelrc, the basic format of this file is shown as the following:

{
  "presets": [],
  "plugins": []
}

2. Install some plunins

Gyumeijie

npm run-script <command> [--silent] [-- <args>...] alias: npm run

Given the following package.json snippet:

  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "build": "babel src -d dist",
    "run": "node dist/main.js"
  }
  

Gyumeijie

# We first get a list of file with suffix 
# and then use `cut` utility to split the 
# full filename into a name and suffix using
# dot as delimiter.
cut -f1 -d'.' <<<$(ls *.*)

Gyumeijie

In most case, if a command takes a file name as a command line arg, we can also use the content of
the file as the standard input of a command, the two ways have the same effect.

For example, a directory contains the following files:

        example1.txt
        example2.txt
        example3.txt
        example4.txt
        example5.txt