use this code to achieve what you need
function addAllContextDataToLinkTrackVars() {
s.linkTrackVars = resetContextDataFromLinkTrackVars()
if (s.contextData) {
let keys = Object.keys(s.contextData)
keys.forEach(key => {
s.linkTrackVars = s.linkTrackVars ? `${s.linkTrackVars},contextData.${key}` : `contextData.${key}`
})
}
}
function resetContextDataFromLinkTrackVars() {
let arrayLinkTrackVars = s.linkTrackVars.split(',')
if (arrayLinkTrackVars.length > 0) {
arrayLinkTrackVars = arrayLinkTrackVars.filter(item => !item.includes('contextData.'))
}
return arrayLinkTrackVars.toString()
}
//then call
addAllContextDataToLinkTrackVars()