console.log('Start app.');

console.log(process.argv);

> nodemon app.js add

Start app.
[ '/Users/jackson/.nvm/versions/node/v10.13.0/bin/node',
  '/Users/jackson/Desktop/compaign/app.js',
  'add' ]

> node app.js add list

[ '/Users/jackson/.nvm/versions/node/v10.13.0/bin/node',
  '/Users/jackson/Desktop/compaign/app.js',
  'add',
  'list' ]

//打印字符串
console.log('Start app.');

console.log(process.argv);

//獲取第三個參數
var command = process.argv[2];

//不同命令執行不同操作
if(command==='add'){
  console.log('Adding new note');
}else if(command === 'list'){
  console.log('Listing allnodes');

}else if(command =='read'){
  console.log('reading node');
}else if(command=='remove'){
  console.log('Remove node');
}else{
  console.log('command not find');
}

> node app.js remove --title="buy book"

Start app.
[ '/Users/jackson/.nvm/versions/node/v10.13.0/bin/node',
  '/Users/jackson/Desktop/compaign/app.js',
  'remove',
  '--title=buy book' ]
Remove node