Answers for "provisional headers are shown"

provisional headers are shown

header("Access-Control-Allow-Origin: *");
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: POST, GET, OPTIONS');
header('Access-Control-Allow-Headers: *');
header('Access-Control-Max-Age: 1728000');
header("Content-Length: 0");
header("Content-Type: text/plain"); 

//add this on the server side 
// on the top of the file

how to resolve provisional headers are shown

chrome --disable-site-isolation-trials --disable-features=NetworkService,NetworkServiceInProcess