Catching hydration errors in Lit

my-element.ts

class MyElement extends LitElement {
  protected update(changedProperties: PropertyValues<this>): void {
    try {
      super.update(changedProperties)
    } catch (e) {
      // We should probably check the contents of the message since this could error on a regular update??
      // I really dont know. Its hacky, but it works.
      const event = new Event("lit-hydration-error", { bubbles: true, composed: true, cancelable: false })
      // @ts-expect-error leave me alone TS.
      event.error = e
      this.dispatchEvent(event)
      throw e
    }
  }
}