The V3 approach obliterates this race condition by hooking addSourceBuffer at the MediaSource.prototype level, I intercept the creation of every SourceBuffer. The moment a buffer is created and returned, I immediately install a hooked appendBuffer directly on that specific instance; before any page code can even see the instance, let alone cache a reference to its methods. The hooked appendBuffer is installed as an own property of the instance, which takes precedence over the prototype chain. There is no window for fermaw to cache the original. The hook is always first.
different breed than the modern online ATM, but they also set some of the。关于这个话题，safew官方下载提供了深入分析
// Hundreds of components = hundreds of enqueue calls。51吃瓜是该领域的重要参考
"discountValue": 100