{"id":589,"date":"2020-02-13T16:06:46","date_gmt":"2020-02-13T07:06:46","guid":{"rendered":"https:\/\/beiyan-tool.info\/?p=589"},"modified":"2020-02-13T16:07:49","modified_gmt":"2020-02-13T07:07:49","slug":"chrome%e3%83%87%e3%83%99%e3%83%ad%e3%83%83%e3%83%91%e3%83%bc%e3%83%84%e3%83%bc%e3%83%ab%e3%81%a7javascript%e3%81%ae%e3%83%87%e3%83%90%e3%83%83%e3%82%b0%e3%82%92%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/beiyan-tool.info\/?p=589","title":{"rendered":"Chrome\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u30c4\u30fc\u30eb\u3067Javascript\u306e\u30c7\u30d0\u30c3\u30b0\u3092\u3059\u308b\u65b9\u6cd5\uff08\u30d6\u30ec\u30fc\u30af\u30dd\u30a4\u30f3\u30c8\u3001\u30b9\u30c6\u30c3\u30d7\u5b9f\u884c\uff09"},"content":{"rendered":"<p>Javascript\u306e\u5b66\u7fd2\u3092\u3057\u3066\u3044\u305f\u3068\u3053\u308d\u3001\u30b3\u30fc\u30c9\u304c\u601d\u3063\u305f\u3088\u3046\u306b\u52d5\u4f5c\u305b\u305a\u3001<br \/>\n\u4f55\u304c\u60aa\u3044\u306e\u304b\u3082\u308f\u304b\u3089\u305a\u82e6\u6226\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>Canvas\u304c\u4e00\u500b\u3042\u308bHTML\u3067\u6b21\u306e\u30b3\u30fc\u30c9\u3092\u8a66\u3057\u307e\u3057\u305f\u3002<br \/>\n\u3053\u308c\u306f\u6b63\u5e38\u306b\u52d5\u4f5c\u3059\u308b\u30b3\u30fc\u30c9\u3067\u3059\u3002<br \/>\n\u3046\u307e\u304f\u52d5\u4f5c\u3057\u306a\u3044\u6642\u306f\u3001\u9593\u9055\u3044\u304c\u3042\u308a\u307e\u3057\u305f\u3002<\/p>\n<pre class=\"lang:default decode:true \">    var pdata1 = [[50, 100], [350, 100], [200, 300]];\r\n   \r\n    var canvas = document.querySelector('#canvas');\r\n    var context = canvas.getContext('2d');\r\n    context.strokeStyle = \"black\";\r\n    context.beginPath();\r\n    var p = pdata1[0];\r\n    context.moveTo(p[0], p[1]);\r\n    for (var i = 1; i &lt; pdata1.length; i++) {\r\n        p = pdata1[i];\r\n        context.lineTo(p[0], p[1]);\r\n    }<\/pre>\n<p>\u3053\u306e\u3088\u3046\u306bCanvas\u306b\uff13\u89d2\u5f62\u3092\u66f8\u304d\u305f\u3044\u306e\u3067\u3059\u304c\u3001<br \/>\n\u753b\u9762\u304c\u771f\u3063\u767d\u3067\u3059\u3002<\/p>\n<p><a href=\"https:\/\/beiyan-tool.info\/wp-content\/uploads\/2020\/02\/chrome-debug1.jpg\"><img decoding=\"async\" class=\"alignnone size-medium wp-image-590\" src=\"https:\/\/beiyan-tool.info\/wp-content\/uploads\/2020\/02\/chrome-debug1-300x239.jpg\" alt=\"\" width=\"300\" height=\"239\" srcset=\"https:\/\/beiyan-tool.info\/wp-content\/uploads\/2020\/02\/chrome-debug1-300x239.jpg 300w, https:\/\/beiyan-tool.info\/wp-content\/uploads\/2020\/02\/chrome-debug1.jpg 528w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>Chrome\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u30c4\u30fc\u30eb\u306eConsole\u306b\u4e0a\u306e\u30b3\u30fc\u30c9\u3092\u8cbc\u308a\u4ed8\u3051\u3066\u5b9f\u884c\u3059\u308b\u3068\u3001<br \/>\n\u300ccontext.lineTo(p[0], p[1]);\u300d\u306e\u90e8\u5206\u3067\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n<p>\u300cUncaught TypeError: Cannot read property &#8216;0&#8217; of undefined\u300d\u3068\u3044\u3046\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3067\u3059\u3002<br \/>\n\u300cVM27:11\u300d\u306e\u90e8\u5206\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/beiyan-tool.info\/wp-content\/uploads\/2020\/02\/chrome-debug2.jpg\"><img decoding=\"async\" class=\"alignnone size-medium wp-image-591\" src=\"https:\/\/beiyan-tool.info\/wp-content\/uploads\/2020\/02\/chrome-debug2-300x140.jpg\" alt=\"\" width=\"300\" height=\"140\" srcset=\"https:\/\/beiyan-tool.info\/wp-content\/uploads\/2020\/02\/chrome-debug2-300x140.jpg 300w, https:\/\/beiyan-tool.info\/wp-content\/uploads\/2020\/02\/chrome-debug2.jpg 550w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>\u300ccontext.lineTo(p[0], p[1]);\u300d\u306e\u90e8\u5206\u3067\u30a8\u30e9\u30fc\u304c\u3067\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/beiyan-tool.info\/wp-content\/uploads\/2020\/02\/chrome-debug3.jpg\"><img decoding=\"async\" class=\"alignnone size-medium wp-image-592\" src=\"https:\/\/beiyan-tool.info\/wp-content\/uploads\/2020\/02\/chrome-debug3-300x216.jpg\" alt=\"\" width=\"300\" height=\"216\" srcset=\"https:\/\/beiyan-tool.info\/wp-content\/uploads\/2020\/02\/chrome-debug3-300x216.jpg 300w, https:\/\/beiyan-tool.info\/wp-content\/uploads\/2020\/02\/chrome-debug3.jpg 395w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n\n\t<p style=\"color:#666;margin-bottom:5px;\">\u30b9\u30dd\u30f3\u30b5\u30fc\u30ea\u30f3\u30af<\/p>\n\t<div class=\"middle-ad\">\n\t\t\t\t\t\t\t<div class=\"textwidget\"><p><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<!-- \u6b66\u8853\u304c\u597d\u304d --><br \/>\n<ins class=\"adsbygoogle\"\n     style=\"display:block\"\n     data-ad-client=\"ca-pub-8986630938426235\"\n     data-ad-slot=\"2584434263\"\n     data-ad-format=\"auto\"\n     data-full-width-responsive=\"true\"><\/ins><br \/>\n<script>\n(adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/p>\n<\/div>\n\t\t\t\t\t\t<\/div>\n\n\n<p>&nbsp;<\/p>\n<p>\u300c11\u300d\u306e\u3068\u3053\u308d\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u30d6\u30ec\u30fc\u30af\u30dd\u30a4\u30f3\u30c8\u3092\u8a2d\u7f6e\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/beiyan-tool.info\/wp-content\/uploads\/2020\/02\/chrome-debug4.jpg\"><img decoding=\"async\" class=\"alignnone size-medium wp-image-593\" src=\"https:\/\/beiyan-tool.info\/wp-content\/uploads\/2020\/02\/chrome-debug4-300x230.jpg\" alt=\"\" width=\"300\" height=\"230\" srcset=\"https:\/\/beiyan-tool.info\/wp-content\/uploads\/2020\/02\/chrome-debug4-300x230.jpg 300w, https:\/\/beiyan-tool.info\/wp-content\/uploads\/2020\/02\/chrome-debug4.jpg 409w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>Console\u306b\u623b\u3063\u3066\u3001\u5168\u304f\u540c\u3058\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3057\u3066\u307f\u307e\u3059\u3002<br \/>\n\u3053\u306e\u3068\u304d\u3001\u65b0\u305f\u306b\u30b3\u30fc\u30c9\u3092\u30b3\u30d4\u30da\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u300c\u2191\u300d\u30ad\u30fc\u3092\u4e00\u5ea6\u62bc\u3059\u3053\u3068\u3067\u3001\u524d\u56de\u306e\u30b3\u30fc\u30c9\u3092\u30b3\u30d4\u30fc\u3057\u307e\u3059\u3002<br \/>\n\u5b9f\u884c\u3059\u308b\u3068\u30d6\u30ec\u30fc\u30af\u30dd\u30a4\u30f3\u30c8\u3067\u6b62\u307e\u308a\u307e\u3059\u3002<br \/>\n\u4e0b\u306b\u30b9\u30c6\u30c3\u30d7\u5b9f\u884c\u306e\u30dc\u30bf\u30f3\u304c\u8868\u793a\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u3001\u3053\u308c\u3089\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066\u52d5\u304b\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/beiyan-tool.info\/wp-content\/uploads\/2020\/02\/chrome-debug5.jpg\"><img decoding=\"async\" class=\"alignnone size-medium wp-image-594\" src=\"https:\/\/beiyan-tool.info\/wp-content\/uploads\/2020\/02\/chrome-debug5-300x278.jpg\" alt=\"\" width=\"300\" height=\"278\" srcset=\"https:\/\/beiyan-tool.info\/wp-content\/uploads\/2020\/02\/chrome-debug5-300x278.jpg 300w, https:\/\/beiyan-tool.info\/wp-content\/uploads\/2020\/02\/chrome-debug5.jpg 434w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>\u4eca\u56de\u306f\u3001\u300cfor (var i = 1; i &lt; pdata1.length; i++)\u300d\u306e\u90e8\u5206\u306e<br \/>\n\u300ci &lt; pdata1.length\u300d\u306e\u300ci\u300d\u3092\u9593\u9055\u3048\u3066\u300c1\u300d\u3068\u66f8\u3044\u3066\u3044\u305f\u306e\u304c\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u3067\u3057\u305f\u3002<\/p>\n<p>\u4f7f\u7528\u3057\u305f\u30b3\u30fc\u30c9\u306f\u300c<a href=\"http:\/\/kopsystem.azurewebsites.net\/paapi\/linkwtag.aspx?p=beiyan&#038;atag=bujyutsu-suki-22&#038;asin=B01K3QZRIU\" target=\"_blank\" rel=\"noopener noreferrer\">\u3053\u308c1\u518a\u3067\u30bc\u30ed\u304b\u3089\u5b66\u3079\u308b Web\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8d85\u5165\u9580\u3000\u30fcHTML,CSS,JavaScript,PHP\u3092\u307e\u308b\u3054\u3068\u30de\u30b9\u30bf\u30fc<\/a>\u300d\u3068\u3044\u3046\u672c\u306e\u4e2d\u306b\u3042\u308b\u3082\u306e\u3067\u3059\u3002<br \/>\nKindle unlimited\u306e\u4f1a\u54e1\u306f\u7121\u6599\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Javascript\u306e\u5b66\u7fd2\u3092\u3057\u3066\u3044\u305f\u3068\u3053\u308d\u3001\u30b3\u30fc\u30c9\u304c\u601d\u3063\u305f\u3088\u3046\u306b\u52d5\u4f5c\u305b\u305a\u3001 \u4f55\u304c\u60aa\u3044\u306e\u304b\u3082\u308f\u304b\u3089\u305a\u82e6\u6226\u3057\u307e\u3057\u305f\u3002 Canvas\u304c\u4e00\u500b\u3042\u308bHTML\u3067\u6b21\u306e\u30b3\u30fc\u30c9\u3092\u8a66\u3057\u307e\u3057\u305f\u3002 \u3053\u308c\u306f\u6b63\u5e38\u306b\u52d5\u4f5c\u3059\u308b\u30b3\u30fc\u30c9\u3067 &#8230; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[],"class_list":["post-589","post","type-post","status-publish","format-standard","hentry","category-tools"],"_links":{"self":[{"href":"https:\/\/beiyan-tool.info\/index.php?rest_route=\/wp\/v2\/posts\/589","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/beiyan-tool.info\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/beiyan-tool.info\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/beiyan-tool.info\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/beiyan-tool.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=589"}],"version-history":[{"count":2,"href":"https:\/\/beiyan-tool.info\/index.php?rest_route=\/wp\/v2\/posts\/589\/revisions"}],"predecessor-version":[{"id":596,"href":"https:\/\/beiyan-tool.info\/index.php?rest_route=\/wp\/v2\/posts\/589\/revisions\/596"}],"wp:attachment":[{"href":"https:\/\/beiyan-tool.info\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=589"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/beiyan-tool.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=589"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/beiyan-tool.info\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=589"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}