UnrealBloomPass is not a constructor

Questions
,
1

I’m trying to apply a bloom filter to a simple 2d curve. I’ve installed the postprocessing package.

But I get _postprocessing.UnrealBloomPass is not a constructor error on the following code.

import * as THREE from "three";
import { BloomEffect, EffectComposer, EffectPass, RenderPass, UnrealBloomPass } from "postprocessing";

let camera;
let composer, renderer, mixer, clock;

const params = {
  exposure: 1,
  bloomStrength: 1.5,
  bloomThreshold: 0.3,
  bloomRadius: 0.5
};

const container = document.getElementById( 'app' );

clock = new THREE.Clock();

renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.toneMapping = THREE.ReinhardToneMapping;
container.appendChild( renderer.domElement );

const scene = new THREE.Scene();

camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 100 );
camera.position.set( - 5, 2.5, - 3.5 );
scene.add( camera );

scene.add( new THREE.AmbientLight( 0x404040 ) );

const pointLight = new THREE.PointLight( 0xffffff, 1 );
camera.add( pointLight );

const curve = new THREE.CubicBezierCurve3(
  new THREE.Vector3(-100, 0, 50),
  new THREE.Vector3(-5, 15, -10),
  new THREE.Vector3(20, 15, 20),
  new THREE.Vector3(10, 0, -0)
);

const points = curve.getPoints(50);

//create a blue LineBasicMaterial
const material = new THREE.LineBasicMaterial( { color: 0x0000ff } );
const geometry = new THREE.BufferGeometry().setFromPoints( points );
const line = new THREE.Line( geometry, material );

scene.add( line );

const renderScene = new RenderPass( scene, camera );

const bloomPass = new UnrealBloomPass( new THREE.Vector2( window.innerWidth, window.innerHeight ), 1.5, 0.4, 0.85 );
bloomPass.threshold = params.bloomThreshold;
bloomPass.strength = params.bloomStrength;
bloomPass.radius = params.bloomRadius;

composer = new EffectComposer( renderer );
composer.addPass( renderScene );
composer.addPass( bloomPass );

composer.render();

What am I doing wrong? Have I installed postprocessing incorrectly? I’d like to do it through npm/yarn ideally.

2 
import {

  UnrealBloomPass

} from 'three/examples/jsm/postprocessing/UnrealBloomPass.js';
3

Is there a way to do this through npm? Or do I have to include the entire source code of three and all the examples in my project?