春节拍照环境往往复杂，我有三招必杀技救急——合照时人脸黑了，别急着删，用「局部」功能在脸上点一下，这是一种更容易上手的蒙版，用两指缩放控制好蒙版覆盖范围，就可以单独调整面部的曝光、色温；
HTMLMediaElement: srcObject property — MDN Web Docs
。业内人士推荐爱思助手下载最新版本作为进阶阅读
Displays some info about the element, including the tag name, class, id and size.
Alexey Milovidov Co-founder & CTO, ClickHouse
computer technology had advanced to such a state that it was obviously possible