VexFlow Sandbox

Experiment with VexFlow

by ronyeh

HTML

<script src="https://unpkg.com/[email protected]/build/cjs/vexflow-debug.js"></script>
<div id="output"></div>

JavaScript

const {
  Renderer,
  Stave,
  StaveNote,
  Voice,
  Formatter
} = Vex.Flow;

// Create an SVG renderer and attach it to the DIV element named "boo".
const div = document.getElementById('output');
const renderer = new Renderer(div, Renderer.Backends.SVG);

// Configure the rendering context.
renderer.resize(500, 500);
const context = renderer.getContext();

// Create a stave of width 400 at position 10, 40 on the canvas.
const stave = new Stave(10, 40, 400);

// Add a clef and time signature.
stave.addClef('treble').addTimeSignature('4/4');

// Connect it to the rendering context and draw!
stave.setContext(context).draw();

// Create the notes
const notes = [
  new StaveNote({
    keys: ['c/5'],
    duration: 'q'
  }),
  new StaveNote({
    keys: ['d/4'],
    duration: 'q'
  }),
  new StaveNote({
    keys: ['b/4'],
    duration: 'qr'
  }),
  new StaveNote({
    keys: ['c/4', 'e/4', 'g/4'],
    duration: 'q'
  }),
];

const notes2 = [new StaveNote({
  keys: ['c/4'],
  duration: 'w'
})];

// Create a voice in 4/4 and add above notes
const voices = [
  new Voice({
    num_beats: 4,
    beat_value: 4
  }).addTickables(notes),
  new Voice({
    num_beats: 4,
    beat_value: 4
  }).addTickables(notes2),
];

// Format and justify the notes to 400 pixels.
new Formatter().joinVoices(voices).format(voices, 350);

// Render voices.
voices.forEach(function(v) {
  v.draw(context, stave);
});