{"id":3412,"date":"2021-07-26T13:29:15","date_gmt":"2021-07-26T04:29:15","guid":{"rendered":"https:\/\/taitan916.info\/blog\/?p=3412"},"modified":"2024-01-12T19:45:24","modified_gmt":"2024-01-12T10:45:24","slug":"post-3412","status":"publish","type":"post","link":"https:\/\/taitan916.info\/blog\/archives\/3412","title":{"rendered":"FileReader API\u3092\u7528\u3044\u3066\u753b\u50cf\u3092\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u305b\u305a\u306b\u30b5\u30e0\u30cd\u30a4\u30eb\u8868\u793a"},"content":{"rendered":"<p>\u4ee5\u524d\u306b<a href=\"https:\/\/taitan916.info\/blog\/archives\/3394\" target=\"_blank\" rel=\"noopener\">File API\u3092\u7528\u3044\u3066\u30d5\u30a1\u30a4\u30eb\u540d\u3084\u30b5\u30a4\u30ba\u3001\u5f62\u5f0f(\u62e1\u5f35\u5b50)\u3092\u53d6\u5f97\u3059\u308b\u30e1\u30e2<\/a>\u3092\u66f8\u3044\u305f\u304c\u3001\u3053\u306e\u5fdc\u7528\u3067\u753b\u50cf\u3092\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u305b\u305a\u306b\u30b5\u30e0\u30cd\u30a4\u30eb\u8868\u793a\u3067\u304d\u308b\u3093\u3058\u3083\u306a\u3044\u304b\u3068\u601d\u3063\u305f\u3002\u8abf\u3079\u3066\u307f\u305f\u3068\u3053\u308dFileReader API\u3092\u7528\u3044\u308b\u3053\u3068\u3067\u5bfe\u5fdc\u3067\u304d\u305f\u3002\u4ee5\u4e0b\u306b\u5b9f\u88c5\u65b9\u6cd5\u3092\u30e1\u30e2\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>FileReader API\u306e\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9<\/h2>\n<p><a href=\"https:\/\/developer.mozilla.org\/ja\/docs\/Web\/API\/FileReader\" target=\"_blank\" rel=\"noopener\">https:\/\/developer.mozilla.org\/ja\/docs\/Web\/API\/FileReader<\/a><\/p>\n<p>&nbsp;<\/p>\n<h2>\u30b5\u30f3\u30d7\u30eb<\/h2>\n<p><a href=\"https:\/\/taitan916.info\/sample\/fileapi\/index2.php\" target=\"_blank\" rel=\"noopener\">https:\/\/taitan916.info\/sample\/fileapi\/index2.php<\/a><\/p>\n<p>\u4e0a\u8a18\u30da\u30fc\u30b8\u3067\u753b\u50cf\u3092\u9078\u629e\u3059\u308b\u3068\u30b5\u30e0\u30cd\u30a4\u30eb\u304c\u8868\u793a\u3055\u308c\u308b\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9<\/h2>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"default\" data-enlighter-title=\"\">&lt;html lang=&quot;ja&quot;&gt;\r\n&lt;head&gt;\r\n&lt;meta http-equiv=&quot;Content-Type&quot; content=&quot;text\/html; charset=UTF-8&quot;&gt;\r\n&lt;title&gt;File API\u3067\u30b5\u30e0\u30cd\u30a4\u30eb\u8868\u793a&lt;\/title&gt;\r\n&lt;\/head&gt;\r\n&lt;style&gt;\r\n.thumb img{\r\n\tmax-width: 150px;\r\n\tmargin-bottom: 10px;\r\n}\r\n&lt;\/style&gt;\r\n&lt;body&gt;\r\n\r\n&lt;input type=&quot;file&quot; name=&quot;img_1&quot; id=&quot;img_1&quot; class=&quot;img&quot;&gt;\r\n&lt;div id=&quot;thumb_1&quot; class=&quot;thumb&quot;&gt;&lt;\/div&gt;\r\n\r\n&lt;input type=&quot;file&quot; name=&quot;img_2&quot; id=&quot;img_2&quot; class=&quot;img&quot;&gt;\r\n&lt;div id=&quot;thumb_2&quot; class=&quot;thumb&quot;&gt;&lt;\/div&gt;\r\n\r\n&lt;script type=&quot;text\/javascript&quot; src=&quot;\/\/code.jquery.com\/jquery-3.5.1.js&quot;&gt;&lt;\/script&gt;\r\n&lt;script type=&quot;text\/javascript&quot;&gt;\r\n$(function(){\r\n\t$(&#039;.img&#039;).change(function(){\r\n\r\n\t\t\/\/ID\u53d6\u5f97\r\n\t\tlet tmp_id = $(this).attr(&#039;id&#039;);\r\n\t\ttmp_id = tmp_id.split(&#039;_&#039;);\r\n\t\tconst id = tmp_id[1];\r\n\r\n\t\t\/\/\u753b\u50cf\u53d6\u5f97\r\n\t\tconst img = $(&#039;#img_&#039; + id).prop(&#039;files&#039;)[0];\r\n\t\tconst type = img.type;\r\n\r\n\t\t\/\/\u753b\u50cf\u304b\u3069\u3046\u304b\u30c1\u30a7\u30c3\u30af\r\n\t\tif( !type.match(\/^image\/) ){\r\n\t\t\talert(&#039;\u753b\u50cf\u3092\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044&#039;);\r\n\t\t\t$(this).val(&#039;&#039;);\r\n\t\t\treturn false;\r\n\t\t}\r\n\r\n\t\t\/\/FileReader\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\r\n\t\tlet reader = new FileReader();\r\n\r\n\t\t\/\/\u753b\u50cf\u306e\u8aad\u307f\u8fbc\u307f\r\n\t\treader.readAsDataURL(img);\r\n\r\n\t\t\/\/\u8aad\u307f\u8fbc\u307f\u5931\u6557\u6642\r\n\t\treader.onerror = function(){\r\n\t\t\talert(&#039;\u30d5\u30a1\u30a4\u30eb\u8aad\u307f\u53d6\u308a\u306b\u5931\u6557\u3057\u307e\u3057\u305f&#039;);\r\n\t\t\t$(this).val(&#039;&#039;);\r\n\t\t\treturn false;\r\n\t\t}\r\n\r\n\t\t\/\/\u753b\u50cf\u3092\u8868\u793a\r\n\t\treader.onload = function() {\r\n\t\t\t$(&#039;#thumb_&#039; + id).html(&#039;&lt;img src=&quot;&#039; + reader.result + &#039;&quot;&gt;&#039;)\r\n\t\t}\r\n\r\n\t});\r\n})\r\n&lt;\/script&gt;\r\n&lt;\/body&gt;\r\n&lt;\/html&gt;<\/pre>\n<p>&nbsp;<\/p>\n<h2>\u5bfe\u5fdc\u30d6\u30e9\u30a6\u30b6<\/h2>\n<p>\u4ee5\u4e0b\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u3092\u78ba\u8a8d\u3057\u305f\u3068\u3053\u308d\u3001\u304a\u304a\u3088\u305d\u306ePC \/ SP\u30d6\u30e9\u30a6\u30b6\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u6a21\u69d8\u3002<\/p>\n<p><a href=\"https:\/\/developer.mozilla.org\/ja\/docs\/Web\/API\/FileReader#browser_compatibility\" target=\"_blank\" rel=\"noopener\">https:\/\/developer.mozilla.org\/ja\/docs\/Web\/API\/FileReader#browser_compatibility<\/a><\/p>\n<p>&nbsp;<\/p>\n<h2>\u6240\u611f<\/h2>\n<p>\u753b\u50cf\u3092\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3059\u308b\u3053\u3068\u306a\u304f\u30b5\u30e0\u30cd\u30a4\u30eb\u8868\u793a\u3067\u304d\u308b\u306e\u306f\u975e\u5e38\u306b\u4fbf\u5229\u304b\u3082\u3057\u308c\u306a\u3044\u3002\u3055\u3089\u306b\u304a\u304a\u3088\u305d\u306e\u30d6\u30e9\u30a6\u30b6\u306b\u3082\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u3088\u3046\u306a\u306e\u3067\u5b9f\u7528\u6027\u304c\u3042\u308a\u305d\u3046\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>\u53c2\u8003\u30b5\u30a4\u30c8<\/h2>\n<p><a href=\"http:\/\/tech.innovation.co.jp\/2017\/02\/25\/image-File-Reader.html\" target=\"_blank\" rel=\"noopener\">http:\/\/tech.innovation.co.jp\/2017\/02\/25\/image-File-Reader.html<\/a><\/p>\n<p><a href=\"https:\/\/cly7796.net\/blog\/javascript\/use-the-file-api-to-display-a-thumbnail-of-the-image-that-is-referenced-from-the-local\/\" target=\"_blank\" rel=\"noopener\">https:\/\/cly7796.net\/blog\/javascript\/use-the-file-api-to-display-a-thumbnail-of-the-image-that-is-referenced-from-the-local\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4ee5\u524d\u306bFile API\u3092\u7528\u3044\u3066\u30d5\u30a1\u30a4\u30eb\u540d\u3084\u30b5\u30a4\u30ba\u3001\u5f62\u5f0f(\u62e1\u5f35\u5b50)\u3092\u53d6\u5f97\u3059\u308b\u30e1\u30e2\u3092 ... <\/p>\n","protected":false},"author":1,"featured_media":1069,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4,9],"tags":[91],"class_list":["post-3412","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-javascript","category-html","tag-image"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u4ee5\u524d\u306bFile API\u3092\u7528\u3044\u3066\u30d5\u30a1\u30a4\u30eb\u540d\u3084\u30b5\u30a4\u30ba\u3001\u5f62\u5f0f(\u62e1\u5f35\u5b50)\u3092\u53d6\u5f97\u3059\u308b\u30e1\u30e2\u3092\u66f8\u3044\u305f\u304c\u3001\u3053\u306e\u5fdc\u7528\u3067\u753b\u50cf\u3092\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u305b\u305a\u306b\u30b5\u30e0\u30cd\u30a4\u30eb\u8868\u793a\u3067\u304d\u308b\u3093\u3058\u3083\u306a\u3044\u304b\u3068\u601d\u3063\u305f\u3002\u8abf\u3079\u3066\u307f\u305f\u3068\u3053\u308dFileReader API\u3092\u7528\u3044\u308b\u3053\u3068\u3067\u5bfe\u5fdc\u3067\u304d\u305f\u3002\u4ee5\u4e0b\u306b\u5b9f\u88c5\u65b9\u6cd5\u3092\u30e1\u30e2\u3002\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"taitan\"\/>\n\t<meta name=\"keywords\" content=\"\u753b\u50cf\u95a2\u9023\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/taitan916.info\/blog\/archives\/3412\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"ja_JP\" \/>\n\t\t<meta property=\"og:site_name\" content=\"\u52c9\u5f37\u3057\u305f\u3053\u3068\u306e\u30e1\u30e2\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"FileReader API\u3092\u7528\u3044\u3066\u753b\u50cf\u3092\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u305b\u305a\u306b\u30b5\u30e0\u30cd\u30a4\u30eb\u8868\u793a | \u52c9\u5f37\u3057\u305f\u3053\u3068\u306e\u30e1\u30e2\" \/>\n\t\t<meta property=\"og:description\" content=\"\u4ee5\u524d\u306bFile API\u3092\u7528\u3044\u3066\u30d5\u30a1\u30a4\u30eb\u540d\u3084\u30b5\u30a4\u30ba\u3001\u5f62\u5f0f(\u62e1\u5f35\u5b50)\u3092\u53d6\u5f97\u3059\u308b\u30e1\u30e2\u3092\u66f8\u3044\u305f\u304c\u3001\u3053\u306e\u5fdc\u7528\u3067\u753b\u50cf\u3092\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u305b\u305a\u306b\u30b5\u30e0\u30cd\u30a4\u30eb\u8868\u793a\u3067\u304d\u308b\u3093\u3058\u3083\u306a\u3044\u304b\u3068\u601d\u3063\u305f\u3002\u8abf\u3079\u3066\u307f\u305f\u3068\u3053\u308dFileReader API\u3092\u7528\u3044\u308b\u3053\u3068\u3067\u5bfe\u5fdc\u3067\u304d\u305f\u3002\u4ee5\u4e0b\u306b\u5b9f\u88c5\u65b9\u6cd5\u3092\u30e1\u30e2\u3002\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/taitan916.info\/blog\/archives\/3412\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/taitan916.info\/blog\/wp-content\/uploads\/2014\/05\/110126-HTML5_Logo.png\" \/>\n\t\t<meta property=\"og:image:secure_url\" 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API\u3092\u7528\u3044\u3066\u30d5\u30a1\u30a4\u30eb\u540d\u3084\u30b5\u30a4\u30ba\u3001\u5f62\u5f0f(\u62e1\u5f35\u5b50)\u3092\u53d6\u5f97\u3059\u308b\u30e1\u30e2\u3092\u66f8\u3044\u305f\u304c\u3001\u3053\u306e\u5fdc\u7528\u3067\u753b\u50cf\u3092\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u305b\u305a\u306b\u30b5\u30e0\u30cd\u30a4\u30eb\u8868\u793a\u3067\u304d\u308b\u3093\u3058\u3083\u306a\u3044\u304b\u3068\u601d\u3063\u305f\u3002\u8abf\u3079\u3066\u307f\u305f\u3068\u3053\u308dFileReader API\u3092\u7528\u3044\u308b\u3053\u3068\u3067\u5bfe\u5fdc\u3067\u304d\u305f\u3002\u4ee5\u4e0b\u306b\u5b9f\u88c5\u65b9\u6cd5\u3092\u30e1\u30e2\u3002\" \/>\n\t\t<meta name=\"twitter:image\" content=\"https:\/\/taitan916.info\/blog\/wp-content\/uploads\/2014\/05\/110126-HTML5_Logo.png\" \/>\n\t\t<script type=\"application\/ld+json\" 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