Method constructor

packages/playground/src/components/TrackList.ts:22–27

(private api: alphaTab.AlphaTabApi)

    private unsubRenderStarted: () => void;

    constructor(private api: alphaTab.AlphaTabApi) {
        this.root = parseHtml(html`<div class="at-track-list"></div>`);

        this.unsubScoreLoaded = api.scoreLoaded.on(score => this.rebuild(score));
        this.unsubRenderStarted = api.renderStarted.on(() => this.refreshActive());
    }

    private rebuild(score: alphaTab.model.Score): void {
        for (const item of this.items) {