Method notify

packages/reactivity/src/dep.ts:173–204

(debugInfo?: DebuggerEventExtraInfo)

  }

  notify(debugInfo?: DebuggerEventExtraInfo): void {
    startBatch()
    try {
      if (__DEV__) {
        // subs are notified and batched in reverse-order and then invoked in
        // original order at the end of the batch, but onTrigger hooks should
        // be invoked in original order here.
        for (let head = this.subsHead; head; head = head.nextSub) {
          if (head.sub.onTrigger && !(head.sub.flags & EffectFlags.NOTIFIED)) {
            head.sub.onTrigger(
              extend(
                {
                  effect: head.sub,
                },
                debugInfo,
              ),
            )
          }
        }
      }
      for (let link = this.subs; link; link = link.prevSub) {
        if (link.sub.notify()) {
          // if notify() returns `true`, this is a computed. Also call notify
          // on its dep - it's called here instead of inside computed's notify
          // in order to reduce call stack depth.
          ;(link.sub as ComputedRefImpl).dep.notify()
        }
      }
    } finally {
      endBatch()
    }
  }
}

function addSub(link: Link) {