Open the file Examples Table Of Contentsopen in new window. That lists all the pre-made demos with links to see each one.
Also look at the Example Generator. You can choose which features you want to use and a working demo will be generated for you.
For examples already online:
Demonstration of all configuration options: Configuratoropen in new window
Transform a textarea into an abc editor with score sheet and audio: Editoropen in new window
Add onto an existing webpage, rendering all abc it finds:Pluginopen in new window
Examples in complete Vue.js project: (search for all the projects with the name in the form
vue-abcjs-****-demo) GitHubopen in new window