lit-sheet-music

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Learn how to create a Lit web component that renders MusicXML using OpenSheetMusicDisplay, allowing you to display sheet music dynamically from a source attribute or inline XML.

Design

What this skill does


# Lit Sheet Music


In this article I will go over how to set up a [Lit](https://lit.dev/) web component and use it to render [musicxml](https://www.musicxml.com/) from a src attribute or inline xml using [opensheetmusicdisplay](https://github.com/opensheetmusicdisplay/opensheetmusicdisplay).

![](https://rodydavis.com/_/../api/files/pbc_2708086759/yz849u5k6kg68n5/nice_rbhmdu7o6t.gif?thumb=)

Now any sheet music can be rendered based on the browser width as an svg or canvas (and will resize when the viewport changes).

> **TLDR** The final source [here](https://github.com/rodydavis/lit-sheet-music) and an online [demo](https://rodydavis.github.io/lit-sheet-music/).

## Prerequisites 

*   Vscode
*   Node >= 16
*   Typescript

## Getting Started 

We can start off by navigating in terminal to the location of the project and run the following:

```
npm init @vitejs/app --template lit-ts
```

Then enter a project name `lit-sheet-music` and now open the project in vscode and install the dependencies:

```
cd lit-sheet-music
npm i lit opensheetmusicdisplay
npm i -D @types/node
code .
```

Update the `vite.config.ts` with the following:

```
import { defineConfig } from "vite";
import { resolve } from "path";

export default defineConfig({
  base: "/lit-sheet-music/",
  build: {
    lib: {
      entry: "src/lit-sheet-music.ts",
      formats: ["es"],
    },
    rollupOptions: {
      input: {
        main: resolve(__dirname, "index.html"),
      },
    },
  },
});
```

## Template 

Open up the `index.html` and update it with the following:

```
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <link rel="icon" type="image/svg+xml" href="/src/favicon.svg" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Lit Sheet Music</title>
    <script type="module" src="/src/sheet-music.ts"></script>
    <style>
      body {
        margin: 0;
        padding: 0;
      }
    </style>
  </head>

  <body>
    <sheet-music
      src="https://raw.githubusercontent.com/opensheetmusicdisplay/opensheetmusicdisplay/develop/demo/BrahWiMeSample.musicxml"
    >
    </sheet-music>
  </body>
</html>
```

If local [musicxml](https://www.musicxml.com/) is intended to be used update `index.html` with the following:

```
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <link rel="icon" type="image/svg+xml" href="/src/favicon.svg" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Lit Sheet Music</title>
    <script type="module" src="/src/sheet-music.ts"></script>
    <style>
      body {
        margin: 0;
        padding: 0;
      }
    </style>
  </head>

  <body>
    <sheet-music>
      <script type="text/xml">
        <?xml version="1.0" standalone="no"?>
        <!DOCTYPE score-partwise PUBLIC
            "-//Recordare//DTD MusicXML Partwise//EN"
            "http://www.musicxml.org/dtds/partwise.dtd">
          <score-partwise>
            <part-list>
              <score-part id="P1">
                <part-name>Voice</part-name>
              </score-part>
            </part-list>
            <part id="P1">
              <measure number="0" implicit="yes">
                <attributes>
                  <divisions>4</divisions>
                  <key>
                    <fifths>-3</fifths>
                    <mode>major</mode>
                  </key>
                  <time>
                    <beats>2</beats>
                    <beat-type>4</beat-type>
                  </time>
                  <clef>
                    <sign>G</sign>
                    <line>2</line>
                  </clef>
                  <directive>Langsam, innig.</directive>
                </attributes>
                <note>
                  <pitch>
                    <step>G</step>
                    <octave>4</octave>
                  </pitch>
                  <duration>2</duration>
                  <type>eighth</type>
                  <stem>up</stem>
                  <notations>
                    <dynamics>
                      <p/>
                    </dynamics>
                  </notations>
                  <lyric>
                    <syllabic>single</syllabic>
                    <text>W&auml;rst</text>
                  </lyric>
                </note>
              </measure>
              <measure number="1">
                <note>
                  <pitch>
                    <step>F</step>
                    <octave>4</octave>
                  </pitch>
                  <duration>3</duration>
                  <type>eighth</type>
                  <dot/>
                  <stem>up</stem>
                  <lyric>
                    <syllabic>single</syllabic>
                    <text>du</text>
                  </lyric>
                </note>
                <note>
                  <pitch>
                    <step>E</step>
                    <alter>-1</alter>
                    <octave>4</octave>
                  </pitch>
                  <duration>1</duration>
                  <type>16th</type>
                  <stem>up</stem>
                  <lyric>
                    <syllabic>single</syllabic>
                    <text>nicht,</text>
                  </lyric>
                </note>
                <note>
                  <pitch>
                    <step>E</step>
                    <alter>-1</alter>
                    <octave>4</octave>
                  </pitch>
                  <duration>2</duration>
                  <type>eighth</type>
                  <stem>up</stem>
                  <lyric>
                    <syllabic>begin</syllabic>
                    <text>heil</text>
                  </lyric>
                </note>
                <note>
                  <pitch>
                    <step>B</step>
                    <alter>-1</alter>
                    <octave>4</octave>
                  </pitch>
                  <duration>1</duration>
                  <type>16th</type>
                  <stem>up</stem>
                  <beam number="1">begin</beam>
                  <beam number="2">begin</beam>
                  <notations>
                    <slur type="start" number="1"/>
                  </notations>
                  <lyric>
                    <syllabic>end</syllabic>
                    <text>ger</text>
                    <extend/>
                  </lyric>
                </note>
                <note>
                  <pitch>
                    <step>G</step>
                    <octave>4</octave>
                  </pitch>
                  <duration>1</duration>
                  <type>16th</type>
                  <stem>up</stem>
                  <beam number="1">end</beam>
                  <beam number="2">end</beam>
                  <notations>
                    <slur type="stop" number="1"/>
                  </notations>
                  <lyric>
                    <extend/>
                  </lyric>
                </note>
              </measure>
            </part>
          </score-partwise>
      </script>
    </sheet-music>
  </body>
</html>
```

We are passing a src attribute to the web component for this example but we can also add a script tag with the type attribute set to `text/xml` with the contents containing the json.

## Web Component 

Before we update our component we need to rename `my-element.ts` to `sheet-music.ts`

Open up `sheet-music.ts` and update it with the following:

```
import { html, css, LitElement } from "lit";
import { customElement, property, query } from "lit/decorators.js";
import { IOSMDOptions, OpenSheetMusicDisplay } from "opensheetmusicdisplay";

type BackendType = "svg" | "canvas";
type DrawingType = "compact" | "default";

@customElement("sheet-music")
export class SheetMusic extends LitElement {
  _zoom = 1.0;

  @property({ type: Boolean }) allowDrop = false;
  @property() src = "";

  @query("main") canvas!: HTMLE

Files: 1

Size: 9.9 KB

Complexity: 18/100

Category: Design

Source: https://github.com/rodydavis/skills/tree/main/skills/lit-sheet-music

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