質問編集履歴
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code 部分を質問画面上で記しました
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うまく行く部分のコード**
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```ここに言語を入力 html
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<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8">
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---**
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合成したら動かないコード**
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```ここに言語を入力 html
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<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8">
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よろしくお願いいたします。
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1
コード実例を追加いたしました。
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test
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https://qiita.com/haribote/items/b17d46b9679ce2fb2712
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一発芸！SVGでHTMLを画像化する
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---**
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うまく行く部分のコード**
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<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8">
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</head>
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<body>
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<section class="">
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<canvas id="cv1" width="360" height="240">
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</canvas>
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<form>
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<input type="button" value="change color" onclick="chgCol()">
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<input type="button" value="convert image" onclick="chgImg()">
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</form>
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<div>
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<img id="newImg">
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</div>
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</section>
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<script>
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var cvs = document.getElementById("cv1");
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var ctx = cvs.getContext("2d");
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//canvas .. draw random color stripes
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function chgCol()
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{
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for ( var i = 0 ; i < 9 ; i++ )
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{
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var r = Math.floor(Math.random()*256);
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var g = Math.floor(Math.random()*256);
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var b = Math.floor(Math.random()*256);
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ctx.fillStyle = "rgb(" + r + "," + g + "," + b + ")";
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ctx.fillRect( 40*i, 0, 40, 240 );
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}
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}
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//canvas data to other image format
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function chgImg()
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{
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var pngData = cvs.toDataURL() ;
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document.getElementById("newImg").src = pngData ;
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}
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// ref: http://www.pori2.net/html5/Canvas/150.html
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//
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// toDataURL(imgage/png) = toDataURL()
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// toDataURL(image/svg+xml)
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// toDataURL(image/jpeg)
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</script>
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</body>
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</html>
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---**
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合成したら動かないコード**
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<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8">
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<script>
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function changeColor()
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{
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document.getElementById("box01" ).style.backgroundColor = "orange" ;
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}
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</script>
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</head>
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<body>
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 460 380" width="460" height="380">
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<style>
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.w00 { width: 100px;
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}
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.h00 { height: 50px;
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}
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.green0 { background-color: green ;
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}
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.blue3 { background-color: lightblue;
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}
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.wrap3 { padding: 15px ;
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}
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</style>
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<g>
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<foreignObject width='100%' height='100%' >
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<div xmlns="http://www.w3.org/1999/xhtml">
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<section class="wrap3 ">
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<div id="box01" class="w00 h00 green0 " >
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</div>
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<div id="box02" class="w00 h00 blue3 " >
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</div>
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</section>
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</div>
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</foreignObject>
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</g>
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</svg>
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<br>
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<button class= " " onclick= "changeColor() " > change color
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</button>
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<section class="">
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<form>
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<input type="button" value="convert image" onclick="chgImg()">
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</form>
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<div>
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<img id="newImg">
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</div>
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</section>
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<footer>
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<script>
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//canvas data to other image format
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const canvasEl = document.getElementById('canvas');
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function chgImg()
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{
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let pngData = canvasEl.toDataURL() ;
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document.getElementById("newImg").src = pngData ;
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}
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</script>
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</footer>
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</body>
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</html>
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371
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よろしくお願いいたします。
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