{"id":359,"date":"2020-07-27T09:04:38","date_gmt":"2020-07-27T00:04:38","guid":{"rendered":"https:\/\/blog.wsd.sh\/?p=359"},"modified":"2020-07-27T09:04:38","modified_gmt":"2020-07-27T00:04:38","slug":"12-13-javascript-%e5%a4%89%e6%9b%b4","status":"publish","type":"post","link":"https:\/\/blog.wsd.sh\/?p=359","title":{"rendered":"12->13 JavaScript \u5909\u66f4"},"content":{"rendered":"<p>\u7121\u540d\u95a2\u6570\u304b\u3089\u901a\u5e38\u306e\u95a2\u6570\u3078<\/p>\n<p>1.1 \/\/ \u8272\u306e\u5909\u66f4<br \/>\n\u7121\u540d\u95a2\u6570\u304b\u3089\u901a\u5e38\u306e\u95a2\u6570\u3078<br \/>\nbrfore:<\/p>\n<pre>\r\n       \/\/ \u8272\u306e\u5909\u66f4\r\n                for (let j = 0; j < c_elms.length; j++) {\r\n                        if(c_elms[j].tagName != 'A') {\r\n                                continue;\r\n                        }\r\n                        c_elms[j].onclick = function() {\r\n                                let cnvColor = this.getAttribute( \"data-color\" ) ;\r\n                                console.log(\"cnvColor =\"+cnvColor );\r\n\r\n                                root.setCnvColor(cnvColor);\r\n                        }\r\n                }\r\n<\/pre>\n<p>after:<\/p>\n<pre>\r\n       \/\/ \u8272\u306e\u5909\u66f4\r\n        for (let i = 0; i < cElements.length; i++) {\r\n                c_elms = cElements[i].childNodes;\r\n\r\n                for (let j = 0; j < c_elms.length; j++) {\r\n                        if(c_elms[j].tagName != 'A') {\r\n                                continue;\r\n                        }\r\n                        c_elms[j].addEventListener(\"click\" , _data_color, false);\r\n\r\n                }\r\n        }\r\n\r\n        function _data_color() {\r\n                let cnvColor = this.getAttribute( \"data-color\" ) ;\r\n                console.log(\"cnvColor =\"+cnvColor );\r\n\r\n                root.setCnvColor(cnvColor);\r\n        }\r\n<\/pre>\n<p>1.2 \/\/ \u7dda\u306e\u592a\u3055\u5909\u66f4<br \/>\n\u7121\u540d\u95a2\u6570\u304b\u3089\u901a\u5e38\u306e\u95a2\u6570\u3078<br \/>\nbrfore:<\/p>\n<pre>\r\n       \/\/ \u7dda\u306e\u592a\u3055\u5909\u66f4\r\n        for (let i = 0; i < bElements.length; i++) {\r\n                b_elms = bElements[i].childNodes;\r\n\r\n                for (let j = 0; j < b_elms.length; j++) {\r\n                        if(b_elms[j].tagName != 'A') {\r\n                                continue;\r\n                        }\r\n                        b_elms[j].onclick = function() {\r\n                                let cnvBold = this.getAttribute( \"data-bold\" ) ;\r\n                                console.log(\"cnvBold =\"+cnvBold );\r\n\r\n                                root.setCnvBold(cnvBold);\r\n                        }\r\n                }\r\n        }\r\n<\/pre>\n<p>after:<\/p>\n<pre>\r\n       \/\/ \u7dda\u306e\u592a\u3055\u5909\u66f4\r\n        for (let i = 0; i < bElements.length; i++) {\r\n                b_elms = bElements[i].childNodes;\r\n\r\n                for (let j = 0; j < b_elms.length; j++) {\r\n                        if(b_elms[j].tagName != 'A') {\r\n                                continue;\r\n                        }\r\n                        b_elms[j].addEventListener(\"click\" , _data_bold, false);\r\n                }\r\n        }\r\n\r\n        function _data_bold() {\r\n                let cnvBold = this.getAttribute( \"data-bold\" ) ;\r\n                console.log(\"cnvBold =\"+cnvBold );\r\n\r\n                root.setCnvBold(cnvBold);\r\n        }\r\n<\/pre>\n<p>1.3 \/\/ \u63cf\u753b\u30af\u30ea\u30a2<br \/>\n\u7121\u540d\u95a2\u6570\u304b\u3089\u901a\u5e38\u306e\u95a2\u6570\u3078<br \/>\nbrfore:<\/p>\n<pre>\r\n       \/\/ \u63cf\u753b\u30af\u30ea\u30a2\r\n        clear.onclick = function(){\r\n                root.ctx.clearRect(0, 0, root.cnvWidth, root.cnvHeight);\r\n                root.setBgColor(root.bgColor);\r\n        }\r\n<\/pre>\n<p>after:<\/p>\n<pre>\r\n       \/\/ \u63cf\u753b\u30af\u30ea\u30a2\r\n        clear.addEventListener(\"click\" , _clear, false);\r\n\r\n        function _clear(){\r\n                root.ctx.clearRect(0, 0, root.cnvWidth, root.cnvHeight);\r\n                root.setBgColor(root.bgColor);\r\n        }\r\n<\/pre>\n<p>1.4 \/\/ canvas\u3092\u753b\u50cf\u3067\u4fdd\u5b58<br \/>\n\u7121\u540d\u95a2\u6570\u304b\u3089\u901a\u5e38\u306e\u95a2\u6570\u3078<br \/>\nbrfore:<\/p>\n<pre>\r\n       \/\/ canvas\u3092\u753b\u50cf\u3067\u4fdd\u5b58\r\n        download.onclick = function(){\r\n                var base64 = root.canvas.toDataURL(\"image\/jpeg\");\r\n                document.getElementById(\"download\").href = base64;\r\n        }\r\n<\/pre>\n<p>after:<\/p>\n<pre>\r\n       \/\/ canvas\u3092\u753b\u50cf\u3067\u4fdd\u5b58\r\n        download.addEventListener(\"click\" , _download, false);\r\n\r\n        function _download(){\r\n                var base64 = root.canvas.toDataURL(\"image\/jpeg\");\r\n                document.getElementById(\"download\").href = base64;\r\n        }\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u7121\u540d\u95a2\u6570\u304b\u3089\u901a\u5e38\u306e\u95a2\u6570\u3078 1.1 \/\/ \u8272\u306e\u5909\u66f4 \u7121\u540d\u95a2\u6570\u304b\u3089\u901a\u5e38\u306e\u95a2\u6570\u3078 brfore: \/\/ \u8272\u306e\u5909\u66f4 for (let j = 0; j < c_elms.length; j++) { if(c_elms[j].t...\n<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=\/wp\/v2\/posts\/359"}],"collection":[{"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=359"}],"version-history":[{"count":1,"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=\/wp\/v2\/posts\/359\/revisions"}],"predecessor-version":[{"id":360,"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=\/wp\/v2\/posts\/359\/revisions\/360"}],"wp:attachment":[{"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=359"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=359"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=359"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}