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详谈JavaScript 二进制家族：Blob、File、FileReader、ArrayBuffer、Base64：https://blog.csdn.net/weixin_43025151/article/details/129743443?ops_request_misc=&request_id=&biz_id=102&utm_term=JavaScript%E4%B8%AD%E7%9A%84Blob%E4%BD%A0%E7%9F%A5%E9%81%93%E5%A4%9A%E5%B0%91&utm_medium=distribute.pc_search_result.none-task-blog-2~all~sobaiduweb~default-5-129743443.142^v100^pc_search_result_base5&spm=1018.2226.3001.4187