primitive.js

const Primitives = {
  uint8: Uint8Array,
  uint16: Uint16Array,
  uint32: Uint32Array,
  int8: Int8Array,
  int16: Int16Array,
  int32: Int32Array,
  float32: Float32Array,
  float64: Float64Array,
};

export default class Primitive {
  static types = Primitives;

  #primitive;

  constructor(ctor, init = 0) {
    this.#primitive = new ctor(1);
    this.#primitive[0] = init;
  }

  get value() {
    return this.#primitive[0];
  }

  set value(v) {
    this.#primitive[0] = v;
  }
}

primitive.ts

const Primitives = {
  uint8: Uint8Array,
  uint16: Uint16Array,
  uint32: Uint32Array,
  int8: Int8Array,
  int16: Int16Array,
  int32: Int32Array,
  float32: Float32Array,
  float64: Float64Array,
};

type PrimitivesType = typeof Primitives[keyof typeof Primitives];

export default class Primitive {
  public static types = Primitives;

  #primitive: InstanceType<PrimitivesType>;

  public constructor(ctor: PrimitivesType, init = 0) {
    this.#primitive = new ctor(1);
    this.#primitive[0] = init;
  }

  public get value() {
    return this.#primitive[0];
  }

  public set value(v: number) {
    this.#primitive[0] = v;
  }
}