问题
I try to draw a stave with SVG using Vexflow and Raphael.js and when I load the page the SVG elements appear in the DOM but they don't appear on the screen.
I checked if there is any CSS rule which could hide the elements, but there isn't any.. Also checked on different browsers, different lib versions, nothing...
Here is the SVG appearing in the DOM :
<html lang="en"><head>
<meta charset="utf-8">
<title>Fermata</title>
<!-- Raphael.js -->
<script src="../deps/raphael/raphael-min.js"></script>
<!-- VexFlow Uncompiled Sources -->
<script src="../deps/vexflow/src/header.js"></script>
<script src="../deps/vexflow/src/vex.js"></script>
<script src="../deps/vexflow/src/flow.js"></script>
<script src="../deps/vexflow/src/fraction.js"></script>
<script src="../deps/vexflow/src/fonts/vexflow_font.js"></script>
<script src="../deps/vexflow/src/glyph.js"></script>
<script src="../deps/vexflow/src/tables.js"></script>
<script src="../deps/vexflow/src/stave.js"></script>
<script src="../deps/vexflow/src/staveconnector.js"></script>
<script src="../deps/vexflow/src/tabstave.js"></script>
<script src="../deps/vexflow/src/voice.js"></script>
<script src="../deps/vexflow/src/voicegroup.js"></script>
<script src="../deps/vexflow/src/modifier.js"></script>
<script src="../deps/vexflow/src/modifiercontext.js"></script>
<script src="../deps/vexflow/src/accidental.js"></script>
<script src="../deps/vexflow/src/dot.js"></script>
<script src="../deps/vexflow/src/tickcontext.js"></script>
<script src="../deps/vexflow/src/tickable.js"></script>
<script src="../deps/vexflow/src/note.js"></script>
<script src="../deps/vexflow/src/bend.js"></script>
<script src="../deps/vexflow/src/stavenote.js"></script>
<script src="../deps/vexflow/src/tabnote.js"></script>
<script src="../deps/vexflow/src/barnote.js"></script>
<script src="../deps/vexflow/src/ghostnote.js"></script>
<script src="../deps/vexflow/src/formatter.js"></script>
<script src="../deps/vexflow/src/stavetie.js"></script>
<script src="../deps/vexflow/src/stavehairpin.js"></script>
<script src="../deps/vexflow/src/tabtie.js"></script>
<script src="../deps/vexflow/src/tabslide.js"></script>
<script src="../deps/vexflow/src/beam.js"></script>
<script src="../deps/vexflow/src/vibrato.js"></script>
<script src="../deps/vexflow/src/annotation.js"></script>
<script src="../deps/vexflow/src/tuning.js"></script>
<script src="../deps/vexflow/src/stavemodifier.js"></script>
<script src="../deps/vexflow/src/keysignature.js"></script>
<script src="../deps/vexflow/src/timesignature.js"></script>
<script src="../deps/vexflow/src/clef.js"></script>
<script src="../deps/vexflow/src/music.js"></script>
<script src="../deps/vexflow/src/keymanager.js"></script>
<script src="../deps/vexflow/src/renderer.js"></script>
<script src="../deps/vexflow/src/stavebarline.js"></script>
<script src="../deps/vexflow/src/stavevolta.js"></script>
<script src="../deps/vexflow/src/staverepetition.js"></script>
<script src="../deps/vexflow/src/stavesection.js"></script>
<script src="../deps/vexflow/src/stavetempo.js"></script>
<script src="../deps/vexflow/src/articulation.js"></script>
<script src="../deps/vexflow/src/tremolo.js"></script>
<script src="../deps/vexflow/src/raphaelcontext.js"></script>
<script src="../deps/vexflow/src/tuplet.js"></script>
<script src="../deps/vexflow/src/boundingbox.js"></script>
<script src="../deps/vexflow/src/textnote.js"></script>
<script src="../deps/vexflow/src/strokes.js"></script>
<script src="../deps/vexflow/src/stringnumber.js"></script>
<script src="../deps/vexflow/src/frethandfinger.js"></script>
<!-- Fermat srcs -->
<script src="../src/Fermata.js"></script>
<script src="../src/Fermata.Utils.js"></script>
<script src="../src/Fermata.Data.js"></script>
<script src="../src/Fermata.Mapping.Clef.js"></script>
<script src="../src/Fermata.Mapping.Direction.js"></script>
<script src="../src/Fermata.Mapping.Connector.js"></script>
<script src="../src/Fermata.Mapping.Barline.js"></script>
<script src="../src/Fermata.Render.js"></script>
<script src="../src/Fermata.Render.Call.js"></script>
<script src="../src/Fermata.Render.SymbolSize.js"></script>
<script src="../src/Fermata.Render.NoteStorage.js"></script>
<script src="../src/Fermata.Render.NoteType.js"></script>
<script src="../src/Fermata.Render.SoundType.js"></script>
<script src="../src/Fermata.Render.PitchPitched.js"></script>
<script src="../src/Fermata.Render.PitchRest.js"></script>
<script src="../src/Fermata.Render.PitchUnpitched.js"></script>
<script src="../src/Fermata.Render.NoteConverter.js"></script>
<script src="../src/Fermata.Render.TieRenderer.js"></script>
<script src="../src/Fermata.Render.GraceNote.js"></script>
<script src="../src/Fermata.Render.CueNote.js"></script>
<script src="../src/Fermata.Render.NormalNote.js"></script>
<script src="../src/Fermata.Render.Note.js"></script>
<script src="../src/Fermata.Render.RenderAttribute.js"></script>
<script src="../src/Fermata.Render.Direction.js"></script>
<script src="../src/Fermata.Render.Barline.js"></script>
<script src="../src/Fermata.Render.Backup.js"></script>
<script src="../src/Fermata.Render.PartList.js"></script>
<script src="../src/Fermata.Render.Header.js"></script>
<script src="../src/Fermata.Render.Score.js"></script>
<script src="../src/Fermata.Drawer.js"></script>
<script src="../src/Fermata.Drawer.Score.js"></script>
</head>
<body>
<div class="container-score">
<canvas id="canvas-score" width="1700px" height="250">
<svg style="overflow: hidden; position: relative;" height="150" version="1.1" width="1700" xmlns="http://www.w3.org/2000/svg">
<desc style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);">Created with Raphaël 2.1.0</desc>
<defs style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);"></defs>
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<rect style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-family: Arial;" x="20" y="50" width="0" height="0.5" r="0" rx="0" ry="0" fill="#000000" stroke="#000000" stroke-width="0.3" font="10pt Arial"></rect>
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</svg>
</canvas>
</div>
<script>
// Hello World
var score = {"score-partwise":{"$version":"3.0","part-list":{"score-part":[{"$id":"P1","part-name":"Music"}]},"part":[{"$id":"P1","measure":[{"$number":"1","attributes":[{"divisions":"1","key":{"fifths":"0"},"time":{"beats":"4","beat-type":"4"},"clef":{"sign":"G","line":"2"}}],"note":[{"pitch":{"step":"C","octave":"4"},"duration":"4","type":"whole"}]}]}]}};
var data = new Fermata.Data(score);
var render = new Fermata.Render(data);
render.renderAll();
var drawer = new Fermata.Drawer(data, document.getElementById('canvas-score'));
drawer.drawAll();
</script><i title="Raphaël Colour Picker" style="display: none; color: black;"></i>
</body>
</html>
And there is no CSS linked to the page.
回答1:
If you add SVG elements via JavaScript you must specify namespace 'http://www.w3.org/2000/svg' for each element.
example
path = document.createElementNS('http://www.w3.org/2000/svg', 'path');
回答2:
The error was obvious, I put my svg tag inside a canvas tag (I just switched from canvas drawing to svg drawing) and it can't work in any browser.
The answer : Just change the canvas tag to a div tag and it works like a charm.
来源：https://stackoverflow.com/questions/14836888/svg-elements-appears-in-dom-but-are-invisible-on-screen