npm -v
    node -v

    cd desktop
    cd part5

    npm init

    npm install --save-dev babel-cli

    "build": babel entry.js"

npm run build

    npm i babel-cli -g

    npm i -D babel-preset-env

{
    presets": [
        [                
            env,{
                targets:{
                    browsers":[last 1 version]
                }
            }
        ]
    ]
}

babel entry.js -o index.js -w"

npm i -D babel-plugin-transform-class-properties

]
                }
            }
        ]
    ],pluginstransform-class-properties]
}