measurement protocol - Google Analytices.js send method -

according analytics.js send method documantation ,i have question:

after send ga('send',...) method , have execute or post request , or there implementation calling ?

by default, analytics.js automatically choose transport method (based on factors hit size, etc.). can specify method explicitly setting transport field.

for example:

ga('send', 'pageview', {transport: 'beacon'});