{"id":4516,"date":"2023-09-10T20:50:25","date_gmt":"2023-09-10T11:50:25","guid":{"rendered":"http:\/\/attacktube.com\/?p=4516"},"modified":"2023-09-10T20:50:38","modified_gmt":"2023-09-10T11:50:38","slug":"%e3%80%90javascript%e3%80%91url-createobjecturl%e3%81%a8url-revokeobjecturl-%e3%81%9d%e3%81%ae2%e3%80%90%e4%b8%ad%e7%b4%9a%e8%80%85%e3%80%91","status":"publish","type":"post","link":"https:\/\/attacktube.com\/?p=4516","title":{"rendered":"\u3010JavaScript\u3011URL.createObjectURL()\u3068URL.revokeObjectURL() \u305d\u306e2\u3010\u4e2d\u7d1a\u8005\u3011"},"content":{"rendered":"\n<p>URL.createObjectURL()\u3068URL.revokeObjectURL()\u3092\u4f7f\u3063\u305f\u30b5\u30f3\u30d7\u30eb\u3002<br>URL.createObjectURL(File\u30aa\u30d6\u30b8\u30a7\u30af\u30c8)\u3068URL.revokeObjectURL(Blob\u30aa\u30d6\u30b8\u30a7\u30af\u30c8)\u3092\u4f7f\u3046\u3002<\/p>\n\n\n\n<!--more-->\n\n\n\n<br>\n<script async=\"\" src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-3461056110605997\" crossorigin=\"anonymous\"><\/script>\n<ins class=\"adsbygoogle\" style=\"display:block; text-align:center;\" data-ad-layout=\"in-article\" data-ad-format=\"fluid\" data-ad-client=\"ca-pub-3461056110605997\" data-ad-slot=\"3137443461\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script>\n<br>\n\n\n\n<pre><code>\n&lt;!DOCTYPE html&gt;\n&lt;html lang=&quot;ja&quot;&gt;\n\n&lt;head&gt;\n\n  &lt;meta charset=&quot;utf-8&quot;&gt;\n  &lt;title&gt;sample&lt;\/title&gt;\n\n  &lt;style&gt;\n  &lt;\/style&gt;\n\n&lt;\/head&gt;\n\n&lt;body&gt;\n\n  \u753b\u50cf\u304b\u3089Blob URL\u3092\u751f\u6210\u3059\u308b\u3002&lt;br&gt;\n  &lt;br&gt;\n\n  &lt;form id=&#039;fileInfo&#039;&gt;\n    &lt;input type=&#039;file&#039; id=&#039;fileInput&#039; multiple name=&#039;files&#039;&gt;\n  &lt;\/form&gt;\n\n  &lt;br&gt;\n\n  &lt;button id=&quot;button&quot;&gt;\u753b\u50cf\u3092\u8aad\u307f\u8fbc\u3080&lt;\/button&gt;\n\n  &lt;br&gt;\n\n  &lt;br&gt;\n\n  &lt;div id=&quot;test&quot;&gt;\n  &lt;\/div&gt;\n\n  &lt;script&gt;\n    \/\/ \u753b\u50cf\u304b\u3089Blob URL\u3092\u751f\u6210\u3059\u308b\u3002\n    const loadImg = (function() {\n\n      const fileInput = document.getElementById(&#039;fileInput&#039;);\n      const Button = document.getElementById(&#039;button&#039;);\n      const testElement = document.getElementById(&#039;test&#039;);\n\n      \/\/ \u65b0\u3057\u3044Image\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\n      const imgElement = new Image();\n\n      const getImage2 = async function() {\n\n        const file = fileInput.files[0];\n\n        if (imgElement.src) {\n          URL.revokeObjectURL(imgElement.src);\n          console.warn(&#039;URL.revokeObjectURL(imgElement.src)\u3092\u5b9f\u884c\u3057\u305f\u3002&#039;);\n        } else {\n          console.log(&#039;else imgElement.src = &#039;, imgElement.src);\n        }\n\n        imgElement.src = URL.createObjectURL(file);\n\n        \/\/ \u4ee5\u524d\u306e\u753b\u50cf\u3092\u30af\u30ea\u30a2\n        if (testElement) {\n          testElement.innerHTML = &#039;&#039;; \/\/ \u3059\u3079\u3066\u306e\u5b50\u8981\u7d20\u3092\u30af\u30ea\u30a2\n        }\n\n        console.log(&#039;imgElement.src = &#039;, imgElement.src);\n\n        testElement.appendChild(imgElement);\n\n      };\n\n      \/\/ \u5b9f\u884c\u3059\u308b\u3002\n      Button.addEventListener(&#039;click&#039;, () =&gt; getImage2());\n\n    })();\n  &lt;\/script&gt;\n\n&lt;\/body&gt;\n\n&lt;\/html&gt;\n<\/code><\/pre>\n\n\n\n<p>\u95a2\u9023<br><a href=\"http:\/\/attacktube.com\/?p=4461\">\u3010JavaScript\u3011URL.createObjectURL()\u3068URL.revokeObjectURL() \u305d\u306e1\u3010\u4e2d\u7d1a\u8005\u3011 (attacktube.com)<\/a><\/p>\n\n\n\n<script type=\"text\/javascript\">\njQuery(function($){\n$(\".jp-video\").hide();\n});\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>URL.createObjectURL()\u3068URL.revokeObjectURL()\u3092\u4f7f\u3063\u305f\u30b5\u30f3\u30d7\u30eb\u3002URL.createObjectURL(File\u30aa\u30d6\u30b8\u30a7\u30af\u30c8)\u3068URL.revokeObjectURL(Blob\u30aa\u30d6 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[3],"tags":[],"class_list":["post-4516","post","type-post","status-publish","format-standard","hentry","category-javascript"],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/posts\/4516","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/attacktube.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4516"}],"version-history":[{"count":2,"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/posts\/4516\/revisions"}],"predecessor-version":[{"id":4518,"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/posts\/4516\/revisions\/4518"}],"wp:attachment":[{"href":"https:\/\/attacktube.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4516"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/attacktube.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4516"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/attacktube.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4516"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}