Engineering

const app = new Vue({el: '#app',data : function(){return {is_loaded:false,newconfig:{},config: {"tracks": [{"title": "Clap","url": "http://altjazz.org/media/audio/children-song/happyclap.mp3","pan": -30,"gain": 0.9,"muted": false,"hidden": false},{"title": "Twinkle","url": "http://altjazz.org/media/audio/children-song/twinklestar.mp3","pan": 81,"gain": 0.6,"muted": false,"hidden": false},{"title": "Spider","url": "http://altjazz.org/media/audio/children-song/eentsyspider.mp3","pan": -49,"gain": 0.85,"muted": false,"hidden": false},],"master": {"pan": 0,"gain": 1,"muted": false}}}}})...