Now let’s revisit the selector wildcard examples from the beginning using BPatterns.
，这一点在雷电模拟器官方版本下载中也有详细论述
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For our purposes, we don’t even need to chase it all the way to raw PCM which is valid avenue albeit in the realm of WEBRips and not defacto “downloaders.” We just need to find the last point in the pipeline where data is still accessible to JavaScript and that point is the MediaSource Extensions API, specifically the SourceBuffer.appendBuffer() method.