I am trying to understand how to send spans with zipkin in javascript to do some tracing. Below is what i am trying to achieve, its just a pseudocode but i can't really find documentation on how to do it and i am not very good with javascript(UI)

What i am trying to achieve are:

• Measure page load time (domContentLoaded - pageLoadStart)
• generate span and send event ot zipkin server on domContentLoaded event

//Pseudocode
let tracer = new Tracer(...params)
let span = new Span(...)
span.start('page load start')


document.addEventListener('DOMContentLoaded', (event) => {
    span.end('page load end')
span.send()
  });