Where and how did you get the data? about chord-collection HOT 3 CLOSED

function getChordsForRootNote(rootNote, instrument, cb) {
    const ukeNormalizeMap = { "Cb":"B", "C":"C", "C#":"Db", "Db":"Db", "D":"D", "D#":"Eb", "Eb":"Eb", "E":"E", "E#":"F", "Fb":"E", "F":"F", "F#":"Gb", "Gb":"Gb", "G":"G", "G#":"Ab", "Ab":"Ab", "A":"A", "A#":"Bb", "Bb":"Bb", "B":"B", "B#":"C"}
    const guitarNormalizeMap = { "Cb":"B", "C":"C", "C#":"C#", "Db":"Db", "D":"D", "D#":"Eb", "Eb":"Eb", "E":"E", "E#":"F", "Fb":"E", "F":"F", "F#":"F#", "Gb":"Gb", "G":"G", "G#":"Ab", "Ab":"Ab", "A":"A", "A#":"Bb", "Bb":"Bb", "B":"B", "B#":"C"}
    rootNote = (instrument==='ukelele') ? ukeNormalizeMap[rootNote] : guitarNormalizeMap[rootNote]
    rootNote = rootNote.replace('#','sharp')
    let ws = new WebSocket("wss://s-usc1c-nss-221.firebaseio.com/.ws?v=5&ns=chord-collection")
    let query = '{"t":"d","d":{"r":1,"a":"q","b":{"p":"/'+instrument+'/chordsByKey/'+rootNote+'","h":""}}}'
    let frameCount = 0
    let response = ''
    ws.onmessage = function (e) {
        if (!isNaN(e.data)) {
            frameCount = parseInt(e.data)
            response = ''
            return
        } else {
            if (frameCount>0) {
                frameCount--
                response+=e.data
            } else
                response=e.data
            if (frameCount === 0) {
                let data = JSON.parse(response)
                if (data && data.d && data.d.b && data.d.b.p && data.d.b.p === instrument+'/chordsByKey/'+rootNote) {
                    cb(data.d.b.d)
                    ws.close()
                }
            }
    	}
    }
    ws.onopen = function(e) {
        ws.send(query)
    }
}
let rootNotes = ['C', 'C#', 'D', 'D#', 'E', 'F', 'F#', 'G', 'G#', 'A', 'A#', 'B']
let chordsObj={}
let retrievedCount=0
rootNotes.forEach(chordBase=>{
    getChordsForRootNote(chordBase, 'ukelele', (chordData) => {
        chordsObj[chordBase] = chordData
        retrievedCount++
        console.log("Retrieved all " + chordBase + " chords (" + retrievedCount + "/" + rootNotes.length + ")")
        if (retrievedCount === rootNotes.length) {
            console.log("Result:")
            console.log(chordsObj)
        }
    })
})