solve an angular 6 problem - full time hourly later

In my project I am using angular 6 as front end and service in Drupal..As this is a music related site I am using audio plugins which I have taken from old site . This audio has some j query which i kept in js files and gave path in [login to view URL] file in script [login to view URL] is working fine if am using the audio tag for single music or using even more than one music with static [login to view URL] for loop in <li > tag. If the for loop array coming from any service by subscribing data, audio tag is not working or can't generate audio button .(May be the reason is DOM elements are getting ready before data are coming through services by [login to view URL] value array are preparing earlier than dynamic value [login to view URL] be the problem is different) I need to play the tracks with dynamic value and make <li> tag class dynamic.