client:75 [default] /Users/mateo/Desktop/app/client/node_modules/@angular/material/core/gestures/MdGestureConfig.d.ts:4:39
Cannot find name 'HammerManager'.

npm install @types/hammerjs --save-dev

"types": [
  "hammerjs"
]

System.config({
    path: {'npm:' : 'node_modules/'},
    map:  {'hammerjs': 'npm:hammerjs'},
    packages: {
        'hammerjs':  { main: './hammer.js', defaultExtension: 'js'}
    }
})