聚合物“reflectToAttribute”和“notify”的确切区别是什么？

class MyElement extends HTMLElement {
  static get observedAttributes() {
    return ['my-attribute'];
  }

  constructor() {
    super();
    this._myAttribute = '';
  }

  get myAttribute() {
    return this._myAttribute;
  }

  set myAttribute(value) {
    const oldValue = this._myAttribute;
    this._myAttribute = value;
    this.setAttribute('my-attribute', value);
    this.dispatchEvent(new CustomEvent('my-attribute-changed', {
      detail: { oldValue }
    }));
  }

  attributeChangedCallback(name, oldValue, newValue) {
    if (name === 'my-attribute') {
      this._myAttribute = newValue;
    }
  }
}

customElements.define('my-element', MyElement);

class MyElement extends HTMLElement {
  static get observedAttributes() {
    return ['my-attribute'];
  }

  constructor() {
    super();
    this._myAttribute = '';
  }

  get myAttribute() {
    return this._myAttribute;
  }

  set myAttribute(value) {
    const oldValue = this._myAttribute;
    this._myAttribute = value;
    this.setAttribute('my-attribute', value);
    this.dispatchEvent(new CustomEvent('my-attribute-changed', {
      detail: { oldValue }
    }));
  }

  attributeChangedCallback(name, oldValue, newValue) {
    if (name === 'my-attribute') {
      this._myAttribute = newValue;
    }
  }
}

customElements.define('my-element', MyElement);