{"author_url":"https://blog.hatena.ne.jp/gakki-uec15/","provider_name":"Hatena Blog","provider_url":"https://hatena.blog","description":"\u306a\u306b\u304c\u3042\u3063\u305f \u300cFileReader\u3067\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u307f(IndexedDB\u306b)\u4fdd\u5b58\u300d\u2192 \u300c\u4fdd\u5b58\u3055\u308c\u305f\u30d5\u30a1\u30a4\u30eb\u3092\u53d6\u308a\u51fa\u3057\u300d\u3068\u3044\u3046\u51e6\u7406\u3092\u3057\u305f\u3044\u306e\u306b\u3001 \u305d\u306e\u307e\u307e\u306e\u9806\u756a\u3067\u66f8\u304f\u3068\u300c\u53d6\u308a\u51fa\u3057\u300d\u2192\u300c\u4fdd\u5b58\u300d\u306b\u306a\u3063\u3066\u3057\u307e\u3063\u305f\u3002 \u539f\u56e0 FileReader\u306f\u975e\u540c\u671f\u3067\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080\u3089\u3057\u3044\u3002\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u8fbc\u307f\u306f\u6642\u9593\u304c\u304b\u304b\u308b\u51e6\u7406\u306a\u306e\u3067\u3001\u300c\u7a7a\u3044\u3066\u308b\u6642\u9593\u3067\u6b21\u306e\u3053\u3068\u3084\u3063\u3066\u3044\u3044\u3088\u30fc\u300d\u3068\u3059\u308b\u3089\u3057\u3044\u3002\u3042\u308a\u304c\u305f\u8ff7\u60d1\u3060\u3002 \u5bfe\u7b56 FileReader.onload \u306b\u53d6\u308a\u51fa\u3057\u51e6\u7406\u3092\u66f8\u3051\u3070\u3044\u3044\u3002 Before var reader = new FileReader(); // \u30d5\u30a1\u30a4\u30eb\u3092ArrayBuffer\u3067\u4fdd\u5b58 reader.r\u2026","title":"javascript\u306eFileReader\u3067\u306f\u307e\u3063\u305f\u8a71","author_name":"gakki-uec15","height":"190","blog_url":"https://gakki-uec15.hatenablog.com/","image_url":null,"type":"rich","categories":[],"version":"1.0","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fgakki-uec15.hatenablog.com%2Fentry%2F2019%2F09%2F19%2F234833\" title=\"javascript\u306eFileReader\u3067\u306f\u307e\u3063\u305f\u8a71 - \u305f\u3060\u306e\u96d1\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","published":"2019-09-19 23:48:33","blog_title":"\u305f\u3060\u306e\u96d1\u8a18","url":"https://gakki-uec15.hatenablog.com/entry/2019/09/19/234833","width":"100%"}