Class CustomRefImpl

packages/reactivity/src/ref.ts:296–320

}

class CustomRefImpl<T, S = T> {
  public dep: Dep

  private readonly _get: ReturnType<CustomRefFactory<T, S>>['get']
  private readonly _set: ReturnType<CustomRefFactory<T, S>>['set']

  public readonly [ReactiveFlags.IS_REF] = true

  public _value: T = undefined!

  constructor(factory: CustomRefFactory<T, S>) {
    const dep = (this.dep = new Dep())
    const { get, set } = factory(dep.track.bind(dep), dep.trigger.bind(dep))
    this._get = get
    this._set = set
  }

  get value(): T {
    return (this._value = this._get())
  }

  set value(newVal: S) {
    this._set(newVal)
  }
}

/**
 * Creates a customized ref with explicit control over its dependency tracking