javascript - how to get API information to only show once and not repeat in an overlay -

i working on project having trouble getting 1 set of data, name , artist appear on overlay. know how solve this?

infohtml += '<p>' + + track.name +  ' <br>by<br>' + track.artists[0].name +   

'

';

https://jsfiddle.net/tlxl/y8nk0q4f/28/