I have found this Q&A.
I have tried to get the version from the package.json using:
import { version } from './package.json';
but it results in:
package.json' has unsupported extension. The only supported extensions are '.ts',
'.tsx', '.d.ts'.
If you are are in a commonJS environment, why not simply use
const pj = require('./package.json')
console.log(pj.version)
EDIT
Since you seem to be using webpack, just add the appropriate loader
module: {
loaders: [
...
{test: /\.json$/, loader: 'json-loader'},
....
which obviously you need to install using npm install