{"id":32532,"date":"2017-09-09T20:49:07","date_gmt":"2017-09-09T11:49:07","guid":{"rendered":"http:\/\/www.sejuku.net\/blog\/?p=32532"},"modified":"2024-06-18T13:30:38","modified_gmt":"2024-06-18T04:30:38","slug":"%e6%9c%80%e3%82%82%e7%b0%a1%e5%8d%98%e3%81%aajavascript%e3%81%ab%e3%82%88%e3%82%8b%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%81%ae%e8%aa%ad%e3%81%bf%e8%be%bc%e3%81%bf%e6%96%b9%e3%81%be%e3%81%a8%e3%82%81","status":"publish","type":"post","link":"https:\/\/www.sejuku.net\/blog\/32532","title":{"rendered":"JavaScript\u3067\u30d5\u30a1\u30a4\u30eb\u51e6\u7406! JSON\u3084CSV\u306a\u3069\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3082\u3046"},"content":{"rendered":"<p><div class=\"box_voice\"><b><br \/>\n\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080\u65b9\u6cd5\u304c\u5206\u304b\u3089\u306a\u3044<br \/>\n\u30c6\u30ad\u30b9\u30c8\u3001CSV\u3001JSON\u306a\u3069\u7a2e\u985e\u306e\u9055\u3046\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u307f\u305f\u3044<br \/>\n\u30c7\u30fc\u30bf\u3084\u30ed\u30b0\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u3080\u306b\u306f\u3069\u3046\u3057\u305f\u3089\u3044\u3044\u306e\uff1f<br \/>\n<\/b><\/div><\/p>\n<p>JavaScript\u3067\u306f\u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\u3092<b>\u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u3060\u3051\u3067\u51e6\u7406\u3059\u308b\u3053\u3068<\/b>\u304c\u3067\u304d\u308b\u306e\u3067\u3059\u304c\u3001\u3044\u3056\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u5206\u304b\u3089\u306a\u3044\u3053\u3068\u304c\u9014\u7aef\u306b\u591a\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u66f8\u304d\u3057\u305f\u308a\u3001\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3067\u304d\u308b\u3088\u3046\u306a\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u308b\u306b\u306f\u3069\u3053\u304b\u3089\u5b66\u7fd2\u3092\u59cb\u3081\u308c\u3070\u3044\u3044\u306e\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n<p>\u3053\u3093\u306b\u3061\u306f\uff01\u30e9\u30a4\u30bf\u30fc\u306e\u30de\u30b5\u30c8\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u521d\u5fc3\u8005\u3067\u3082\u4eca\u65e5\u304b\u3089<b>\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u66f8\u304d\u3084\u51fa\u529b\u65b9\u6cd5\u3092\u30de\u30b9\u30bf\u30fc\u3059\u308b\u65b9\u6cd5<\/b>\u306b\u3064\u3044\u3066\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u306e\u3067\u3001\u305c\u3072\u6700\u5f8c\u307e\u3067\u8aad\u3093\u3067\u7406\u89e3\u3092\u6df1\u3081\u3066\u9802\u3051\u308c\u3070\u5e78\u3044\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u306f\u3053\u3093\u306a\u4eba\u306e\u305f\u3081\u306b\u66f8\u304d\u307e\u3057\u305f\u3002<\/p>\n<div class=\"box01\">\n<ul>\n<li><b>\u591a\u5f69\u306a\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080\u65b9\u6cd5\u3092\u5b66\u7fd2\u3057\u305f\u3044\u65b9<\/b><\/li>\n<li><b>File API\u306e\u57fa\u790e\u3092\u7406\u89e3\u3057\u305f\u3044\u65b9<\/b><\/li>\n<li><b>\u30d5\u30a1\u30a4\u30eb\u306e\u66f8\u304d\u8fbc\u307f\u30fb\u4fdd\u5b58\u624b\u9806\u3092\u77e5\u308a\u305f\u3044\u65b9<\/b><\/li>\n<\/ul>\n<\/div>\n<h2>FileAPI\u3068\u306f\uff1f<\/h2>\n<p>\u305d\u308c\u3067\u306f\u3001\u307e\u305aJavaScript\u3092\u4f7f\u3063\u3066\u300c\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u8fbc\u307f\u300d\u306b\u5bfe\u5fdc\u3055\u305b\u308b\u57fa\u672c\u7684\u306a\u77e5\u8b58\u304b\u3089\u5b66\u7fd2\u3092\u9032\u3081\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n<p>\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u8fbc\u307f\u3092\u5b9f\u73fe\u3055\u305b\u308b\u305f\u3081\u306b\u306f\u3001\u4e00\u822c\u7684\u306bFile API\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u306f\u3001HTML5\u304b\u3089\u5229\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u6a5f\u80fd\uff08API\uff09\u306b\u306a\u308a\u307e\u3059\u3002JavaScript\u304b\u3089File API\u3067\u63d0\u4f9b\u3055\u308c\u3066\u3044\u308b\u30e1\u30bd\u30c3\u30c9\u3092\u7d44\u307f\u8fbc\u3080\u3053\u3068\u3067\u7c21\u5358\u306bPC\u306e\u30ed\u30fc\u30ab\u30eb\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u307e\u305b\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<p>\u30c6\u30ad\u30b9\u30c8\u30d5\u30a1\u30a4\u30eb\u3084CSV\u30fbJSON\u30fb\u753b\u50cf\u2026\u306a\u3069\u3001\u3055\u307e\u3056\u307e\u306a\u5f62\u5f0f\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u307e\u305b\u3066Web\u306b\u53cd\u6620\u3055\u305b\u308b\u3053\u3068\u304c\u51fa\u6765\u308b\u306e\u3067\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u306aWeb\u30da\u30fc\u30b8\u3092\u69cb\u7bc9\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>File API\u3092\u5229\u7528\u3059\u308b\u30e1\u30ea\u30c3\u30c8\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\uff01<\/p>\n<div class=\"box01\">\n<ul>\n<li><b>JavaScript\u304b\u3089\u30ed\u30fc\u30ab\u30eb\u30d5\u30a1\u30a4\u30eb\u3092\u6271\u3048\u308b<\/b><\/li>\n<li><b>CSV,JSON,\u30c6\u30ad\u30b9\u30c8,\u753b\u50cf\u306a\u3069\u591a\u5f69\u306a\u5f62\u5f0f\u3092\u6271\u3048\u308b<\/b><\/li>\n<li><b>\u30c7\u30fc\u30bf\u3092\u4efb\u610f\u306e\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u51fa\u3057\u30fb\u4fdd\u5b58\u3067\u304d\u308b<\/b><\/li>\n<\/ul>\n<\/div>\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u6a5f\u80fd\u3092\u3059\u3079\u3066\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u306e\u3067\u3001\u305c\u3072\u53c2\u8003\u306b\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n<h2>FileAPI\u306e\u4f7f\u3044\u65b9<\/h2>\n<p>\u3053\u306e\u7ae0\u3067\u306f\u3001JavaScript\u3067\u30d5\u30a1\u30a4\u30eb\u3092\u6271\u3046\u305f\u3081\u306eFile API\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01\u4e3b\u306b\u3001API\u306e\u6982\u8981\u3068\u30c6\u30ad\u30b9\u30c8\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u8fbc\u307f\u30fb\u8868\u793a\u65b9\u6cd5\u306b\u3064\u3044\u3066\u5b66\u3093\u3067\u3044\u304d\u307e\u3059\u3002<\/p>\n<h3>JavaScript\u3067\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080<\/h3>\n<p>\u3053\u3053\u304b\u3089\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080\u305f\u3081\u306e\u5b9f\u8df5\u7684\u306a\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u5b66\u7fd2\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01\u30d6\u30e9\u30a6\u30b6\u4e0a\u3067\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080\u305f\u3081\u306e\u4e00\u822c\u7684\u306a\u65b9\u6cd5\u3068\u3057\u3066\u306f\u3001input\u30bf\u30b0\u306e\u300ctype\u300d\u5c5e\u6027\u306b\u300cfile\u300d\u3092\u6307\u5b9a\u3059\u308b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"lang:html decode:true\">&lt;form&gt;\n\n      &lt;input type=\"file\" \/&gt;\n\n&lt;\/form&gt;<\/pre>\n<p>\u3053\u306e\u3088\u3046\u306b\u300ctype=&#8221;file&#8221;\u300d\u3068\u8a18\u8ff0\u3059\u308b\u3060\u3051\u3067\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30d5\u30a1\u30a4\u30eb\u3092\u9078\u629e\u3067\u304d\u308bUI\u304c\u8868\u793a\u3055\u308c\u308b\u306e\u304c\u5206\u304b\u308a\u307e\u3059\uff01<br \/>\n<img decoding=\"async\" class=\"alignnone size-full wp-image-32537\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/09\/javascript-file-api-tutorial-2.jpg\" alt=\"javascript-file-api-tutorial-2\" width=\"400\" height=\"200\" srcset=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/09\/javascript-file-api-tutorial-2.jpg 400w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/09\/javascript-file-api-tutorial-2-150x75.jpg 150w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/09\/javascript-file-api-tutorial-2-300x150.jpg 300w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><br \/>\n\u30dc\u30bf\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u300c\u30d5\u30a1\u30a4\u30eb\u30a8\u30af\u30b9\u30d7\u30ed\u30fc\u30e9\u30fc\u300d\u304c\u8868\u793a\u3055\u308c\u308b\u306e\u3067\u3001\u4efb\u610f\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u9078\u3076\u3053\u3068\u304c\u51fa\u6765\u308b\u308f\u3051\u3067\u3059\u3002<\/p>\n<p>\u305f\u3060\u3057\u3001\u3053\u306e\u307e\u307e\u3060\u3068\u30d5\u30a1\u30a4\u30eb\u3092\u9078\u3079\u308b\u3060\u3051\u3067\u3042\u308a\u3001\u306a\u3093\u306e\u51e6\u7406\u3082\u5b9f\u884c\u3055\u308c\u307e\u305b\u3093\u3002\u305d\u3053\u3067\u3001\u8aad\u307f\u8fbc\u3093\u3060\u30d5\u30a1\u30a4\u30eb\u3092JavaScript\u5074\u3067\u53d6\u5f97\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u6b21\u306e\u30b5\u30f3\u30d7\u30eb\u4f8b\u3092\u898b\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n<pre class=\"lang:html decode:true \">&lt;body&gt;\n  \n  &lt;form name=\"myform\"&gt;\n    &lt;input name=\"myfile\" type=\"file\" \/&gt;\n  &lt;\/form&gt;\n  \n  &lt;script&gt;\n    \n    \/\/Form\u8981\u7d20\u3092\u53d6\u5f97\u3059\u308b\n    var form = document.forms.myform;\n    \n    \/\/\u30d5\u30a1\u30a4\u30eb\u304c\u8aad\u307f\u8fbc\u307e\u308c\u305f\u6642\u306e\u51e6\u7406\n    form.myfile.addEventListener('change', function(e) {\n      \n      \/\/\u3053\u3053\u306b\u30d5\u30a1\u30a4\u30eb\u53d6\u5f97\u51e6\u7406\u3092\u66f8\u304f\n      \n    })\n  &lt;\/script&gt;\n  \n&lt;\/body&gt;<\/pre>\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001Form\u8981\u7d20\u306bname\u5c5e\u6027\u5024\u3092\u6307\u5b9a\u3057\u3066JavaScript\u304b\u3089\u53d6\u5f97\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>Form\u8981\u7d20\u3092\u53d6\u5f97\u3057\u305f\u3089\u3001input\u30bf\u30b0\u306e\u30a4\u30d9\u30f3\u30c8\u51e6\u7406\u3092\u4f5c\u6210\u3057change\u3092\u4f7f\u3063\u3066\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3093\u3060\u304b\u3069\u3046\u304b\u3092\u691c\u77e5\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3059\u308b\u3053\u3068\u3067\u3001JavaScript\u5074\u304b\u3089\u8aad\u307f\u8fbc\u3093\u3060\u30d5\u30a1\u30a4\u30eb\u3092\u53d6\u5f97\u3057\u3066\u64cd\u4f5c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u3067\u3059\uff01<\/p>\n<p>\u3061\u306a\u307f\u306b\u3001document\u3084name\u5c5e\u6027\u3092\u6d3b\u7528\u3057\u305fForm\u8981\u7d20\u306e\u53d6\u5f97\u65b9\u6cd5\u306b\u95a2\u3057\u3066\u306f\u3001\u6b21\u306e\u8a18\u4e8b\u3067\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u306e\u3067\u305c\u3072\u53c2\u8003\u306b\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\uff01<br \/>\n            <a href=\"https:\/\/www.sejuku.net\/blog\/30970\" class=\"blog-card-anchor\">\n                <div class=\"blog-card\">\n                <div class=\"blog-card-content\">\n                    <div class=\"blog-card-thumbnail\">\n                    <img decoding=\"async\" class=\"blog-card-thumbnail-img\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/07\/js_eye-150x86.jpg\">\n                    <\/div>\n                    <div class=\"blog-card-title-wrap\">\n                    <div class=\"blog-card-title\">HTML\u306e\u8981\u7d20\u3092\u53d6\u5f97\u3059\u308b! JavaScript\u306edocument\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u4f7f\u3044\u65b9<\/div>\n                    <div class=\"blog-card-update-date\">\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n                    <\/div>\n                <\/div>\n                <\/div>\n            <\/a>\n            <\/p>\n<h3>\u30c6\u30ad\u30b9\u30c8\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080<\/h3>\n<p>\u6b21\u306b\u3001\u65e9\u901f\u3067\u3059\u304c\u30c6\u30ad\u30b9\u30c8\u30d5\u30a1\u30a4\u30eb\u3092\u5b9f\u969b\u306b\u8aad\u307f\u8fbc\u3093\u3067\u307f\u307e\u3057\u3087\u3046\uff01\u57fa\u672c\u7684\u306b\u306f\u5148\u307b\u3069\u306e\u30b3\u30fc\u30c9\u4f8b\u3068\u307e\u3063\u305f\u304f\u540c\u3058\u306a\u306e\u3067\u3059\u304c\u3001\u30a4\u30d9\u30f3\u30c8\u51e6\u7406\u306e\u4e2d\u8eab\u3092\u6b21\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:js decode:true \">var form = document.forms.myform;\n\nform.myfile.addEventListener( 'change', function(e) {\n\n    \/\/\u8aad\u307f\u8fbc\u3093\u3060\u30d5\u30a1\u30a4\u30eb\u60c5\u5831\u3092\u53d6\u5f97\n    var result = e.target.files;\n\n    console.log( result );\n\n})<\/pre>\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001Form\u8981\u7d20\u3092\u53d6\u5f97\u3057\u3066input\u30bf\u30b0\u306e\u30a4\u30d9\u30f3\u30c8\u51e6\u7406\u3092change\u3092\u4f7f\u3063\u3066\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u30a4\u30d9\u30f3\u30c8\u51e6\u7406\u306e\u4e2d\u8eab\u3067\u3059\u304c\u3001\u300ce.target.files\u300d\u3067\u8aad\u307f\u8fbc\u3093\u3060\u30d5\u30a1\u30a4\u30eb\u306e\u60c5\u5831\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3001\u30b3\u30f3\u30bd\u30fc\u30eb\u753b\u9762\u306b\u306f\u6b21\u306e\u3088\u3046\u306a\u8868\u793a\u304c\u3055\u308c\u3066\u3044\u308b\u306f\u305a\u3067\u3059\uff01<br \/>\n<img decoding=\"async\" class=\"alignnone size-full wp-image-32538\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/09\/javascript-file-api-tutorial-3.jpg\" alt=\"javascript-file-api-tutorial-3\" width=\"500\" height=\"250\" srcset=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/09\/javascript-file-api-tutorial-3.jpg 500w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/09\/javascript-file-api-tutorial-3-150x75.jpg 150w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/09\/javascript-file-api-tutorial-3-300x150.jpg 300w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><br \/>\n\u300ce.target.files\u300d\u3067\u53d6\u5f97\u3057\u305f\u30d5\u30a1\u30a4\u30eb\u60c5\u5831\u306f\u914d\u5217\u306e\u3088\u3046\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306b\u306a\u3063\u3066\u304a\u308a\u30010\u756a\u76ee\u306e\u8981\u7d20\u306b\u8aad\u307f\u8fbc\u3093\u3060\u30d5\u30a1\u30a4\u30eb\u306e\u30c7\u30fc\u30bf\u304c\u8868\u793a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u30d5\u30a1\u30a4\u30eb\u306e\u4f5c\u6210\u65e5\u3084\u300c\u30d5\u30a1\u30a4\u30eb\u540d\u300d\u300c\u5bb9\u91cf\u300d\u300c\u30bf\u30a4\u30d7\u300d\u306a\u3069\u3001\u3044\u304f\u3064\u304b\u306e\u60c5\u5831\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n<h3>\u30d5\u30a1\u30a4\u30eb\u306e\u4e2d\u8eab\u3092\u51fa\u529b\u3059\u308b\u65b9\u6cd5<\/h3>\n<p>\u4eca\u5ea6\u306f\u3001\u53d6\u5f97\u3057\u305f\u30d5\u30a1\u30a4\u30eb\u306e\u4e2d\u8eab\u3092\u30d6\u30e9\u30a6\u30b6\u4e0a\u306b\u8868\u793a\u3057\u3066\u307f\u307e\u3057\u3087\u3046\uff01\u305d\u3053\u3067\u3001Form\u5185\u306btextarea\u30bf\u30b0\u3092\u8a2d\u7f6e\u3057\u3066\u3053\u306e\u4e2d\u306b\u30d5\u30a1\u30a4\u30eb\u306e\u4e2d\u8eab\u3092\u8868\u793a\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n<pre class=\"lang:html decode:true \">&lt;form name=\"myform\"&gt;\n\n    &lt;input name=\"myfile\" type=\"file\" \/&gt;&lt;br\/&gt;\n    &lt;textarea name=\"output\" cols=\"80\" rows=\"10\"&gt;&lt;\/textarea&gt;\n\n&lt;\/form&gt;<\/pre>\n<p>textarea\u306ename\u5c5e\u6027\u306f\u300coutput\u300d\u3068\u3057\u3001\u6b21\u306e\u3088\u3046\u306a\u8868\u793a\u306b\u306a\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<br \/>\n<img decoding=\"async\" class=\"alignnone size-full wp-image-32539\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/09\/javascript-file-api-tutorial-4.jpg\" alt=\"javascript-file-api-tutorial-4\" width=\"500\" height=\"250\" srcset=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/09\/javascript-file-api-tutorial-4.jpg 500w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/09\/javascript-file-api-tutorial-4-150x75.jpg 150w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/09\/javascript-file-api-tutorial-4-300x150.jpg 300w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><br \/>\n\u3042\u3068\u306fJavaScript\u5074\u306e\u51e6\u7406\u3067\u3059\u304c\u3001\u8aad\u307f\u8fbc\u3093\u3060\u30d5\u30a1\u30a4\u30eb\u306e\u4e2d\u8eab\u3092\u53d6\u5f97\u3059\u308b\u51e6\u7406\u3092\u8ffd\u8a18\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u6b21\u306e\u30b5\u30f3\u30d7\u30eb\u4f8b\u3092\u898b\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n<pre class=\"lang:js decode:true \">var form = document.forms.myform;\n\nform.myfile.addEventListener( 'change', function(e) {\n\n    var result = e.target.files[0];\n\n    \/\/FileReader\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3059\u308b\n    var reader = new FileReader();\n  \n    \/\/\u8aad\u307f\u8fbc\u3093\u3060\u30d5\u30a1\u30a4\u30eb\u306e\u4e2d\u8eab\u3092\u53d6\u5f97\u3059\u308b\n    reader.readAsText( result );\n  \n    \/\/\u30d5\u30a1\u30a4\u30eb\u306e\u4e2d\u8eab\u3092\u53d6\u5f97\u5f8c\u306b\u51e6\u7406\u3092\u884c\u3046\n    reader.addEventListener( 'load', function() {\n    \n        \/\/\u30d5\u30a1\u30a4\u30eb\u306e\u4e2d\u8eab\u3092textarea\u5185\u306b\u8868\u793a\u3059\u308b\n        form.output.textContent = reader.result;    \n    })\n\n})<\/pre>\n<p>\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u306e\u30dd\u30a4\u30f3\u30c8\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u4e2d\u8eab\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306b\u300cFileReader\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u300d\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3057\u3066\u3044\u308b\u70b9\u3067\u3059\u3002\u3053\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u3082\u3068\u306b\u3001\u300creadAsText()\u300d\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u3053\u3068\u3067\u8aad\u307f\u8fbc\u3093\u3060\u30d5\u30a1\u30a4\u30eb\u306e\u4e2d\u8eab\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u308b\u308f\u3051\u3067\u3059\u3002<\/p>\n<p>\u3042\u3068\u306f\u3001\u3061\u3083\u3093\u3068\u53d6\u5f97\u304c\u3067\u304d\u305f\u5f8c\u306b\u30d6\u30e9\u30a6\u30b6\u3078\u8868\u793a\u3057\u305f\u3044\u306e\u3067\u3001\u30a4\u30d9\u30f3\u30c8\u51e6\u7406\uff08load\uff09\u3092\u4f5c\u6210\u3057\u3066textarea\u5185\u306b\u8868\u793a\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002\uff08\u53d6\u5f97\u3057\u305f\u30d5\u30a1\u30a4\u30eb\u306e\u4e2d\u8eab\u306freader.result\u306b\u683c\u7d0d\u3055\u308c\u3066\u3044\u307e\u3059\uff09<\/p>\n<h2>\u7a2e\u985e\u306e\u9055\u3046\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080<\/h2>\n<p>\u3053\u306e\u7ae0\u3067\u306f\u3001\u3055\u307e\u3056\u307e\u306a\u5f62\u5f0f\u30fb\u30bf\u30a4\u30d7\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080\u65b9\u6cd5\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01\u4e3b\u306b\u3001CSV\u30fbJSON\u30fb\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080\u65b9\u6cd5\u306b\u3064\u3044\u3066\u5b66\u3093\u3067\u3044\u304d\u307e\u3059\u3002<\/p>\n<h3>CSV\u30d5\u30a1\u30a4\u30eb\u30921\u884c\u305a\u3064\u8aad\u307f\u8fbc\u3080<\/h3>\n<p>\u3055\u3066\u3001\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3081\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u304d\u305f\u3089\u3001\u3055\u307e\u3056\u307e\u306a\u5f62\u5f0f\u306e\u30d5\u30a1\u30a4\u30eb\u306b\u3082\u6311\u6226\u3057\u3066\u307f\u307e\u3057\u3087\u3046\uff01<\/p>\n<p>\u307e\u305a\u306f\u3001\u5229\u7528\u983b\u5ea6\u306e\u9ad8\u3044\u300cCSV\u300d\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3093\u3067\u307e\u3059\u3002\u3068\u2026\u8a00\u3063\u3066\u3082\u3001\u5b9f\u306f\u5148\u307b\u3069\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u666e\u901a\u306b\u8aad\u307f\u8fbc\u3080\u3053\u3068\u306f\u53ef\u80fd\u306a\u3093\u3067\u3059\u3002<\/p>\n<p>\u3057\u304b\u3057\u306a\u304c\u3089\u3001\u305b\u3063\u304b\u304fCSV\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080\u306e\u3067\u3059\u304b\u3089\u3001\u3042\u308b\u7a0b\u5ea6JavaScript\u5074\u3067\u7de8\u96c6\u3057\u305f\u65b9\u304c\u826f\u3044\u3067\u3057\u3087\u3046\u3002\u4f8b\u3048\u3070\u3001CSV\u30d5\u30a1\u30a4\u30eb\u30921\u884c\u305a\u3064\u8aad\u307f\u8fbc\u307f\u305f\u3044\u5834\u5408\u306b\u306f\u3001\u30a4\u30d9\u30f3\u30c8\u51e6\u7406\u5185\u306e\u8a18\u8ff0\u3092\u6b21\u306e\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:js decode:true \">reader.addEventListener( 'load', function() {\n    \n    \/\/CSV\u30921\u884c\u305a\u3064\u8aad\u307f\u8fbc\u3080\n    console.log( reader.result.split('n') );\n    \n})<\/pre>\n<p>\u5b9f\u884c\u7d50\u679c<\/p>\n<pre class=\"striped:false marking:false ranges:false nums:false nums-toggle:false lang:default decode:true \">[\"name,age,country\", \"taro,20,japan\", \"hanako,23,japan...]<\/pre>\n<p>\u30d5\u30a1\u30a4\u30eb\u306e\u4e2d\u8eab\u3092\u4fdd\u6301\u3057\u3066\u3044\u308b\u300creader.result\u300d\u306b\u3001\u6539\u884c\u30b3\u30fc\u30c9\u3092\u5bfe\u8c61\u306b\u3057\u3066\u300csplit(&#8216;n&#8217;)\u300d\u3092\u4f7f\u3046\u3053\u3068\u30671\u884c\u305a\u3064\u8aad\u307f\u8fbc\u3093\u3067\u914d\u5217\u306b\u683c\u7d0d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u308f\u3051\u3067\u3059\u3002\u540c\u3058\u8003\u3048\u65b9\u3067\u3001CSV\u306e\u5404\u30c7\u30fc\u30bf\u3092\u914d\u5217\u306b\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u306d\uff01<\/p>\n<pre class=\"lang:js decode:true \">reader.addEventListener( 'load', function() {\n    \n    \/\/CSV\u306e\u5404\u30c7\u30fc\u30bf\u6bce\u306b\u8aad\u307f\u8fbc\u3080\n    console.log( reader.result.split(',') );\n    \n})<\/pre>\n<p>\u5b9f\u884c\u7d50\u679c<\/p>\n<pre class=\"striped:false marking:false ranges:false nums:false nums-toggle:false lang:default decode:true \">[\"name\", \"age\", \"country\u201d, taro\", \"20\", \"japan\u201d...]<\/pre>\n<p>\u4eca\u5ea6\u306f\u300c,\uff08\u30ab\u30f3\u30de\uff09\u300d\u3092\u5bfe\u8c61\u306b\u3057\u3066\u3001\u300csplit(&#8216;,&#8217;)\u300d\u3092\u8a18\u8ff0\u3059\u308c\u30701\u3064\u305a\u3064\u306e\u30c7\u30fc\u30bf\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3066\u914d\u5217\u306b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u3067\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n<h3>JSON\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u8fbc\u307f<\/h3>\n<p>\u6b21\u306b\u3001JSON\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3093\u3067\u307f\u307e\u3057\u3087\u3046\uff01\u540c\u3058\u3088\u3046\u306b\u3001\u3053\u308c\u307e\u3067\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f7f\u3048\u3070\u666e\u901a\u306b\u8aad\u307f\u8fbc\u3081\u308b\u306e\u3067\u3059\u304c\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u4e2d\u8eab\u3092\u53d6\u5f97\u3059\u308b\u6642\u306b\u5c11\u3057\u30b3\u30c4\u304c\u3044\u308b\u306e\u3067\u3054\u7d39\u4ecb\u3057\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n<p>\u307e\u305a\u306f\u3001\u901a\u5e38\u901a\u308a\u30d5\u30a1\u30a4\u30eb\u306e\u4e2d\u8eab\u3092\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u8868\u793a\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"lang:js decode:true \">reader.addEventListener( 'load', function() {\n    \n    console.log( reader.result );\n    \n})<\/pre>\n<p>\u5b9f\u884c\u7d50\u679c<\/p>\n<pre class=\"striped:false marking:false ranges:false nums:false nums-toggle:false lang:default decode:true \">{\"\u30d5\u30eb\u30fc\u30c4\": [\"\u30a2\u30c3\u30d7\u30eb\", \"\u30d0\u30ca\u30ca\", \"\u30ea\u30f3\u30b4\"], \"\u4eba\u540d\": {\"\u30e1\u30f3\u30d0\u30fc1\":[\"\u592a\u90ce\", 30]...}}<\/pre>\n<p>\u300creader.result\u300d\u3092\u4f7f\u3048\u3070\u4e2d\u8eab\u3092\u53d6\u5f97\u3067\u304d\u308b\u308f\u3051\u3067\u3059\u304c\u3001\u5b9f\u884c\u7d50\u679c\u306b\u51fa\u529b\u3055\u308c\u3066\u3044\u308b\u306e\u306fJSON\u306e\u69cb\u9020\u3092\u3057\u305f\u30c6\u30ad\u30b9\u30c8\u6587\u5b57\u306b\u306a\u3063\u3066\u3044\u308b\u70b9\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\uff01\u305f\u3060\u306e\u6587\u5b57\u5217\u306a\u306e\u3067\u3001JavaScript\u3067\u6271\u3046\u306b\u306f\u5c11\u3057\u4e0d\u4fbf\u3067\u3059\u306d\u3002<\/p>\n<p>\u305d\u3053\u3067\u3001\u3053\u306e\u6587\u5b57\u5217\u3092JSON\u5f62\u5f0f\u306b\u5909\u63db\u3057\u3066\u3042\u3052\u308b\u5fc5\u8981\u304c\u3042\u308b\u308f\u3051\u3067\u3059\uff01<\/p>\n<pre class=\"lang:js decode:true \">reader.addEventListener( 'load', function() {\n\n    \/\/JSON\u5f62\u5f0f\u306b\u5909\u63db\u3059\u308b    \n    console.log( JSON.parse(reader.result) );\n    \n})<\/pre>\n<p>\u300cJSON.parse()\u300d\u3092\u4f7f\u3046\u3053\u3068\u3067JSON\u306e\u69cb\u9020\u3092\u3057\u305f\u6587\u5b57\u5217\u3092\u3001\u6271\u3044\u3084\u3059\u3044JSON\u5f62\u5f0f\u306e\u30c7\u30fc\u30bf\u3068\u3057\u3066\u5909\u63db\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u308b\u308f\u3051\u3067\u3059\u3002\u5b9f\u884c\u7d50\u679c\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\uff01<br \/>\n<img decoding=\"async\" class=\"alignnone size-full wp-image-32540\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/09\/javascript-file-api-tutorial-5.jpg\" alt=\"javascript-file-api-tutorial-5\" width=\"500\" height=\"250\" srcset=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/09\/javascript-file-api-tutorial-5.jpg 500w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/09\/javascript-file-api-tutorial-5-150x75.jpg 150w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/09\/javascript-file-api-tutorial-5-300x150.jpg 300w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><br \/>\n\u3053\u306e\u3088\u3046\u306bJSON\u30c7\u30fc\u30bf\u306b\u5909\u63db\u3067\u304d\u308c\u3070\u3001\u3042\u3068\u306ffor-in\u306a\u3069\u3067\u30eb\u30fc\u30d7\u51e6\u7406\u3082\u7c21\u5358\u306b\u3067\u304d\u308b\u306e\u3067\u3001JavaScript\u5074\u304b\u3089\u64cd\u4f5c\u3057\u3084\u3059\u304f\u306a\u308b\u3067\u3057\u3087\u3046\u3002JSON\u306e\u8a73\u3057\u3044\u4f7f\u3044\u65b9\u306f\u3053\u3061\u3089\u306e\u8a18\u4e8b\u3067\u89e3\u8aac\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u305c\u3072\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n            <a href=\"https:\/\/www.sejuku.net\/blog\/47716\" class=\"blog-card-anchor\">\n                <div class=\"blog-card\">\n                <div class=\"blog-card-content\">\n                    <div class=\"blog-card-thumbnail\">\n                    <img decoding=\"async\" class=\"blog-card-thumbnail-img\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/08\/javascript_json-re20180813-150x86.jpg\">\n                    <\/div>\n                    <div class=\"blog-card-title-wrap\">\n                    <div class=\"blog-card-title\">\u3010JavaScript\u5165\u9580\u3011JSON\u306e\u4f5c\u6210\u3068parse() \/ stringify()\u306e\u4f7f\u3044\u65b9\uff01<\/div>\n                    <div class=\"blog-card-update-date\">\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n                    <\/div>\n                <\/div>\n                <\/div>\n            <\/a>\n            \n<h3>\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u8fbc\u307f<\/h3>\n<p>\u30c6\u30ad\u30b9\u30c8\u30d5\u30a1\u30a4\u30eb\u3060\u3051\u3067\u306a\u304f\u3001\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u8fbc\u307f\u306b\u3082\u6311\u6226\u3057\u3066\u307f\u307e\u3057\u3087\u3046\uff01<\/p>\n<p>\u3053\u308c\u307e\u3067\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u4e2d\u8eab\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306b\u300creadAsText()\u300d\u3092\u4f7f\u3063\u3066\u3044\u307e\u3057\u305f\u304c\u3001\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u306e\u5834\u5408\u306b\u306f\u300creadAsDataURL()\u300d\u3092\u4f7f\u3046\u3053\u3068\u3067\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u57fa\u672c\u7684\u306b\u3001\u3053\u308c\u307e\u3067\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u4ee3\u7528\u53ef\u80fd\u306a\u306e\u3067\u3059\u304c\u3001\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u3092\u8868\u793a\u3057\u305f\u3044\u306e\u3067img\u30bf\u30b0\u3092\u3042\u3089\u304b\u3058\u3081\u8a18\u8ff0\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"lang:html decode:true \">&lt;form name=\"myform\"&gt;\n  &lt;input name=\"myfile\" type=\"file\" multiple\/&gt;&lt;br\/&gt;\n&lt;\/form&gt;\n\n&lt;img id=\"img\" \/&gt;<\/pre>\n<p>\u3042\u3068\u306f\u3001JavaScript\u3092\u6b21\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:js decode:true \">\/\/\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u306e\u4e2d\u8eab\u3092\u53d6\u5f97\u3059\u308b\nreader.readAsDataURL( result );\n  \nreader.addEventListener( 'load', function() {\n    \n    \/\/image\u30bf\u30b0\u306esrc\u5c5e\u6027\u306b\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u306e\u4e2d\u8eab\u3092\u5f53\u3066\u306f\u3081\u308b\n    img.src = reader.result;\n    \n})<\/pre>\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u300creadAsDataURL()\u300d\u3092\u4f7f\u3063\u3066\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u306e\u4e2d\u8eab\u3092\u53d6\u5f97\u3057\u3066\u3044\u308b\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n<p>\u30a4\u30d9\u30f3\u30c8\u51e6\u7406\u5185\u3067\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u53d6\u5f97\u5f8c\u306bimage\u30bf\u30b0\u306esrc\u5c5e\u6027\u306b\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u306e\u4e2d\u8eab\u3067\u3042\u308b\u300creader.result\u300d\u3092\u4ee3\u5165\u3059\u308c\u3070\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u753b\u50cf\u304c\u8868\u793a\u3067\u304d\u307e\u3059\u3002<br \/>\n<img decoding=\"async\" class=\"alignnone size-full wp-image-32541\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/09\/javascript-file-api-tutorial-6.jpg\" alt=\"javascript-file-api-tutorial-6\" width=\"500\" height=\"250\" srcset=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/09\/javascript-file-api-tutorial-6.jpg 500w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/09\/javascript-file-api-tutorial-6-150x75.jpg 150w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/09\/javascript-file-api-tutorial-6-300x150.jpg 300w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/p>\n<h2>\u8907\u6570\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080\u65b9\u6cd5<\/h2>\n<p>\u3053\u308c\u307e\u3067\u306e\u30b5\u30f3\u30d7\u30eb\u3067\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u30921\u3064\u3060\u3051\u8aad\u307f\u8fbc\u3093\u3067\u3044\u307e\u3057\u305f\u304c\u8907\u6570\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u540c\u6642\u306b\u8aad\u307f\u8fbc\u307e\u305b\u308b\u3053\u3068\u3082\u3067\u304d\u308b\u306e\u3067\u3054\u7d39\u4ecb\u3057\u3066\u304a\u304d\u307e\u3059\uff01<\/p>\n<p>\u307e\u305a\u3001input\u30bf\u30b0\u306e\u5c5e\u6027\u306b\u300cmultiple\u300d\u3092\u4ed8\u3051\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"lang:js decode:true \">&lt;form name=\"myform\"&gt;\n  &lt;input name=\"myfile\" type=\"file\" multiple\/&gt;\n&lt;\/form&gt;<\/pre>\n<p>\u5b9f\u306f\u3001\u3053\u308c\u3060\u3051\u3067\u8907\u6570\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u8fbc\u307f\u306b\u5bfe\u5fdc\u3055\u305b\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\uff01<\/p>\n<p>\u3057\u304b\u3057\u306a\u304c\u3089\u3001JavaScript\u5074\u3067\u9806\u756a\u306b\u8907\u6570\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u307e\u305b\u306a\u3051\u308c\u3070\u3044\u3051\u306a\u3044\u306e\u3067\u3001\u3053\u308c\u307e\u3067\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3068\u306f\u5c11\u3057\u9055\u3044\u307e\u3059\u3002\u4f55\u500b\u306e\u30d5\u30a1\u30a4\u30eb\u304c\u8aad\u307f\u8fbc\u307e\u308c\u308b\u304b\u5206\u304b\u3089\u306a\u3044\u306e\u3067\u3001for\u6587\u3067\u3059\u3079\u3066\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u53d6\u5f97\u3057\u3066\u3044\u304f\u306e\u304c\u6700\u3082\u7c21\u5358\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>\u6b21\u306e\u30b5\u30f3\u30d7\u30eb\u4f8b\u3092\u898b\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n<pre class=\"lang:js decode:true \">var results = e.target.files;         \/\/\u8907\u6570\u30d5\u30a1\u30a4\u30eb\u306e\u30c7\u30fc\u30bf\nvar end = e.target.files.length; \/\/\u30d5\u30a1\u30a4\u30eb\u6570\n  \n    \n\/\/\u3059\u3079\u3066\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080\nfor(var i=0; i&lt;end; i++) {\n      var reader = new FileReader();\n   \n      reader.readAsText( results[i] );\n    \n      reader.addEventListener('load', function(e) {\n\n            console.log( e.target.result );\n\n      })\n}<\/pre>\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u8907\u6570\u306e\u30d5\u30a1\u30a4\u30eb\u30c7\u30fc\u30bf\u3092\u300cresults\u300d\u306b\u4ee3\u5165\u3057\u3001\u305d\u308c\u3092\u9806\u756a\u306bfor\u6587\u3067\u8aad\u307f\u8fbc\u3093\u3067\u3044\u308b\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n<p>\u5c11\u3057\u9055\u3046\u306e\u306f\u3001\u30a4\u30d9\u30f3\u30c8\u51e6\u7406\u5185\u3067\u30d5\u30a1\u30a4\u30eb\u306e\u4e2d\u8eab\u3092\u51fa\u529b\u3059\u308b\u305f\u3081\u306b\u300creader.result\u300d\u3092\u4f7f\u3046\u306e\u3067\u306f\u306a\u304f\u3001\u300ce.target.result\u300d\u3092\u4f7f\u3063\u3066\u3044\u308b\u70b9\u3067\u3059\u3002\u3053\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u3066\u304a\u304b\u306a\u3044\u3068\u4e0a\u624b\u304f\u51fa\u529b\u3055\u308c\u306a\u3044\u306e\u3067\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2>\u30c7\u30fc\u30bf\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u3080<\/h2>\n<p>\u3053\u306e\u7ae0\u3067\u306f\u3001<b>\u30c7\u30fc\u30bf\u3092\u4efb\u610f\u306e\u30d5\u30a1\u30a4\u30eb\u3078\u66f8\u304d\u8fbc\u3080\u57fa\u672c\u7684\u306a\u65b9\u6cd5<\/b>\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01\u4e3b\u306b\u3001\u30c6\u30ad\u30b9\u30c8\u30c7\u30fc\u30bf\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u3080\u65b9\u6cd5\u3084\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3059\u308b\u624b\u6cd5\u306b\u3064\u3044\u3066\u5b66\u3093\u3067\u3044\u304d\u307e\u3059\u3002<\/p>\n<h3>\u30c6\u30ad\u30b9\u30c8\u30c7\u30fc\u30bf\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u3080\u65b9\u6cd5<\/h3>\n<p>JavaScript\u3092\u4f7f\u3063\u3066\u4efb\u610f\u306e\u30d5\u30a1\u30a4\u30eb\u3078\u30c7\u30fc\u30bf\u3092\u66f8\u304d\u8fbc\u3080\u624b\u9806\u3068\u3057\u3066\u306f\u3001\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u306b\u5909\u63db\u3059\u308b\u65b9\u6cd5\u304c\u3082\u3063\u3068\u3082\u7c21\u5358\u3067\u3059\u3002<\/p>\n<p>\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u306b\u5909\u63db\u3059\u308b\u3053\u3068\u3067\u3001\u30c6\u30ad\u30b9\u30c8\u3067\u3082\u753b\u50cf\u3067\u3082\u6570\u5024\u30c7\u30fc\u30bf\u306b\u3067\u304d\u308b\u306e\u3067JavaScript\u304b\u3089\u6271\u3044\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u3092\u4f5c\u6210\u3059\u308b\u306b\u306fBlob\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"lang:js decode:true\">var blob = new Blob(\u30c7\u30fc\u30bf\u914d\u5217, \u30d5\u30a1\u30a4\u30eb\u30bf\u30a4\u30d7);\n<\/pre>\n<p>\u7b2c1\u5f15\u6570\u306b\u30c7\u30fc\u30bf\u3092\u914d\u5217\u3067\u683c\u7d0d\u3057\u3001\u4efb\u610f\u306e\u30d5\u30a1\u30a4\u30eb\u30bf\u30a4\u30d7\u3092\u8a2d\u5b9a\u3059\u308c\u3070\u3044\u3044\u308f\u3051\u3067\u3059\u306d<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u30c6\u30ad\u30b9\u30c8\u3060\u3051\u306e\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u3092\u4f5c\u6210\u3059\u308b\u306b\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"lang:js decode:true\">var blob = new Blob(['\u3053\u3093\u306b\u3061\u306f'], { \"type\" : \"text\/plain\" });\n<\/pre>\n<p>\u3053\u308c\u3067\u6587\u5b57\u5217\u306e\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u304c\u4f5c\u6210\u3055\u308c\u307e\u3057\u305f\u3002\u3042\u3068\u306f\u3001\u3053\u306e\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u3092\u4efb\u610f\u306e\u30d5\u30a1\u30a4\u30eb\u5f62\u5f0f\u3067\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3067\u304d\u308b\u3088\u3046\u306b\u51e6\u7406\u3059\u308c\u3070\u3001\u30d5\u30a1\u30a4\u30eb\u3078\u306e\u66f8\u304d\u8fbc\u307f\u304c\u5b9f\u73fe\u3059\u308b\u308f\u3051\u3067\u3059\u3002<\/p>\n<p>\u3061\u306a\u307f\u306b\u3001\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u3084Blob\u306e\u6982\u8981\u3084\u57fa\u672c\u7684\u306a\u6271\u3044\u65b9\u306b\u3064\u3044\u3066\u306f\u6b21\u306e\u8a18\u4e8b\u3067\u8a73\u3057\u304f\u307e\u3068\u3081\u3066\u3044\u308b\u306e\u3067\u305c\u3072\u53c2\u8003\u306b\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n            <a href=\"https:\/\/www.sejuku.net\/blog\/67735\" class=\"blog-card-anchor\">\n                <div class=\"blog-card\">\n                <div class=\"blog-card-content\">\n                    <div class=\"blog-card-thumbnail\">\n                    <img decoding=\"async\" class=\"blog-card-thumbnail-img\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/08\/javascript-tutorial-top-150x86.png\">\n                    <\/div>\n                    <div class=\"blog-card-title-wrap\">\n                    <div class=\"blog-card-title\">\u3010JavaScript\u5165\u9580\u3011Blob\u306e\u4f7f\u3044\u65b9\u3068\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u30fb\u4fdd\u5b58\u65b9\u6cd5\u307e\u3068\u3081\uff01<\/div>\n                    <div class=\"blog-card-update-date\">\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n                    <\/div>\n                <\/div>\n                <\/div>\n            <\/a>\n            \n<h3>\u30d5\u30a1\u30a4\u30eb\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3059\u308b\u65b9\u6cd5<\/h3>\n<p>\u4efb\u610f\u306e\u30c7\u30fc\u30bf\u3092\u30d5\u30a1\u30a4\u30eb\u3068\u3057\u3066\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3059\u308b\u306b\u306f\u3001\u5148\u307b\u3069\u8aac\u660e\u3057\u305f\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u3092\u5229\u7528\u3057\u307e\u3059\u3002\u307e\u305a\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u30dc\u30bf\u30f3\u3092\u6b21\u306e\u3088\u3046\u306b\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:js decode:true\"><a id=\"btn\" download=\"sample.txt\"><\/a>\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\n<\/pre>\n<p><b>a\u30bf\u30b0\u3067\u4f5c\u6210\u3059\u308b<\/b>\u3068\u3044\u3046\u70b9\u306b\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002\u7406\u7531\u3068\u3057\u3066\u306f\u3001download\u5c5e\u6027\u306b\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3059\u308b\u30d5\u30a1\u30a4\u30eb\u540d\u3068\u5f62\u5f0f\u3092\u8a2d\u5b9a\u3067\u304d\u308b\u305f\u3081\u3067\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001href\u5c5e\u6027\u304c\u7a7a\u6587\u5b57\u306b\u306a\u3063\u3066\u3044\u308b\u306e\u3067\u3059\u304c\u3001\u3053\u308c\u306f\u6b21\u306eJavaScript\u304b\u3089\u52d5\u7684\u306b\u4f5c\u6210\u3059\u308b\u306e\u3067\u5b89\u5fc3\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u5b9f\u969b\u306e\u30d5\u30a1\u30a4\u30eb\u3078\u306e\u66f8\u304d\u8fbc\u307f\u51e6\u7406\u3068\u3057\u3066\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"lang:js decode:true\">const btn = document.getElementById('btn');\n\nbtn.addEventListener('click', function() {\n      const blob = new Blob(['\u3053\u3093\u306b\u3061\u306f'], { \"type\" : \"text\/plain\" });\n\n      btn.href = window.URL.createObjectURL(blob);   \n})\n<\/pre>\n<p>a\u30bf\u30b0\u306e\u30af\u30ea\u30c3\u30af\u30a4\u30d9\u30f3\u30c8\u51e6\u7406\u5185\u306b\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u3092\u4f5c\u6210\u3059\u308b\u51e6\u7406\u3092\u8a18\u8ff0\u3057\u3066\u3044\u307e\u3059\u3002createObjectURL\u3092\u4f7f\u3046\u3068\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u306eURL\u3092\u53d6\u5f97\u3067\u304d\u308b\u306e\u3067\u3001\u3053\u308c\u3092a\u30bf\u30b0\u306ehref\u5c5e\u6027\u306b\u8a2d\u5b9a\u3059\u308b\u308f\u3051\u3067\u3059\u3002<\/p>\n<p>\u3042\u3068\u306f\u3001a\u30bf\u30b0\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3060\u3051\u3067\u6587\u5b57\u5217\u3092\u66f8\u304d\u8fbc\u3093\u3060\u30d5\u30a1\u30a4\u30eb\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u4eca\u56de\u306f\u3001\u3055\u307e\u3056\u307e\u306a\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u8fbc\u307f\u65b9\u6cd5\u306b\u3064\u3044\u3066\u5b66\u7fd2\u3092\u3057\u307e\u3057\u305f\uff01\u6700\u5f8c\u306b\u3001\u30dd\u30a4\u30f3\u30c8\u3060\u3051\u3092\u3082\u30461\u5ea6\u307e\u3068\u3081\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<div class=\"box01\">\n<ul>\n<li><b>HTML5\u304b\u3089\u5229\u7528\u53ef\u80fd\u306b\u306a\u3063\u305fFile API\u3092\u4f7f\u3046\u3053\u3068\u3067\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3081\u308b<\/b><\/li>\n<li><b>\u30c6\u30ad\u30b9\u30c8, CSV, JSON, \u753b\u50cf\u306a\u3069\u3001\u3055\u307e\u3056\u307e\u306a\u5f62\u5f0f\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u64cd\u4f5c\u53ef\u80fd<\/b><\/li>\n<li><b>\u30c6\u30ad\u30b9\u30c8\u306f\u300creadAsText()\u300d\u3092\u4f7f\u3044\u3001\u753b\u50cf\u306f\u300creadAsDataURL()\u300d\u3092\u4f7f\u3046<\/b><\/li>\n<li><b>input\u30bf\u30b0\u306b\u300cmultiple\u300d\u5c5e\u6027\u3092\u8a18\u8ff0\u3059\u308b\u3053\u3068\u3067\u8907\u6570\u30d5\u30a1\u30a4\u30eb\u306b\u5bfe\u5fdc\u3067\u304d\u308b<\/b><\/li>\n<\/ul>\n<\/div>\n<p>\u4e0a\u8a18\u5185\u5bb9\u3092\u8e0f\u307e\u3048\u3066\u3001\u305c\u3072\u81ea\u5206\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306b\u3082\u7a4d\u6975\u7684\u306b\u53d6\u308a\u5165\u308c\u3089\u308c\u308b\u3088\u3046\u306b\u5b66\u7fd2\u3092\u9032\u3081\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080\u65b9\u6cd5\u304c\u5206\u304b\u3089\u306a\u3044 \u30c6\u30ad\u30b9\u30c8\u3001CSV\u3001JSON\u306a\u3069\u7a2e\u985e\u306e\u9055\u3046\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u307f\u305f\u3044 \u30c7\u30fc\u30bf\u3084\u30ed\u30b0\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u3080\u306b\u306f\u3069\u3046\u3057\u305f\u3089\u3044\u3044\u306e\uff1f JavaScript\u3067\u306f\u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\u3092\u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u3060\u3051\u3067\u51e6\u7406\u3059 [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":66202,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"swell_btn_cv_data":"","footnotes":""},"categories":[2346],"tags":[95,1072],"class_list":["post-32532","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-javascript-study","tag-javascript","tag-1072"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>JavaScript\u3067\u30d5\u30a1\u30a4\u30eb\u51e6\u7406! JSON\u3084CSV\u306a\u3069\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3082\u3046 | \u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u30d6\u30ed\u30b0<\/title>\n<meta name=\"description\" content=\"\u3053\u306e\u8a18\u4e8b\u3067\u306f\u300c JavaScript\u3067\u30d5\u30a1\u30a4\u30eb\u51e6\u7406! 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