{"id":3203,"date":"2024-11-10T10:47:12","date_gmt":"2024-11-10T02:47:12","guid":{"rendered":"https:\/\/fwq.ai\/blog\/3203\/"},"modified":"2024-11-10T10:47:12","modified_gmt":"2024-11-10T02:47:12","slug":"js-%e5%a6%82%e4%bd%95%e8%8e%b7%e5%8f%96file","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/3203\/","title":{"rendered":"js \u5982\u4f55\u83b7\u53d6file"},"content":{"rendered":"<blockquote><p>\n  \u5728 javascript \u4e2d\u83b7\u53d6\u6587\u4ef6\u6709\u4ee5\u4e0b\u65b9\u6cd5\uff1a\u4ece\u672c\u5730\u9009\u62e9\u6587\u4ef6\uff1a\u521b\u5efa input \u6807\u7b7e\uff08type \u4e3a file\uff09\u5e76\u76d1\u542c change \u4e8b\u4ef6\u3002\u4ece\u670d\u52a1\u5668\u83b7\u53d6\u6587\u4ef6\uff1a\u4f7f\u7528 xmlhttprequest \u5bf9\u8c61\u6253\u5f00\u6587\u4ef6\u8bf7\u6c42\uff0c\u8bbe\u7f6e\u54cd\u5e94\u7c7b\u578b\u4e3a\u4e8c\u8fdb\u5236\u6570\u636e\u3002\u4ece\u62d6\u62fd\u4e8b\u4ef6\u83b7\u53d6\u6587\u4ef6\uff1a\u76d1\u542c\u9875\u9762\u4e0a\u7684\u62d6\u62fd\u4e8b\u4ef6\uff0c\u83b7\u53d6\u62d6\u62fd\u7684\u6587\u4ef6\u5217\u8868\u3002\u4f7f\u7528 filereader \u89e3\u6790\u6587\u4ef6\uff1a\u521b\u5efa filereader \u5bf9\u8c61\uff0c\u76d1\u542c\u6587\u4ef6\u52a0\u8f7d\u4e8b\u4ef6\uff0c\u89e3\u6790\u6587\u4ef6\u5185\u5bb9\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/08\/2024110806574068115.jpg\" class=\"aligncenter\" title=\"js \u5982\u4f55\u83b7\u53d6file\u63d2\u56fe\" alt=\"js \u5982\u4f55\u83b7\u53d6file\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u5728 JS \u4e2d\u83b7\u53d6\u6587\u4ef6<\/strong><\/p>\n<p>\u5728 JavaScript \u4e2d\uff0c\u6709\u51e0\u79cd\u65b9\u6cd5\u53ef\u4ee5\u83b7\u53d6\u6587\u4ef6\uff0c\u5177\u4f53\u53d6\u51b3\u4e8e\u6587\u4ef6\u7684\u4f4d\u7f6e\u548c\u83b7\u53d6\u65b9\u5f0f\u3002<\/p>\n<p><strong>\u4ece\u672c\u5730\u9009\u62e9\u6587\u4ef6<\/strong><\/p>\n<pre>\/\/ \u521b\u5efa\u4e00\u4e2a input \u6807\u7b7e\uff0c\u7c7b\u578b\u4e3a\u6587\u4ef6\nconst input = document.createElement('input');\ninput.type = 'file';\n\n\/\/ \u76d1\u542c\u8f93\u5165\u7684 change \u4e8b\u4ef6\uff0c\u83b7\u53d6\u9009\u4e2d\u7684\u6587\u4ef6\ninput.addEventListener('change', (e) =&gt; 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