what's this mean ? fetch will be replace xmlhttprequest ?

[xgqfrms-GitHub]

Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience.
For more help, check https://xhr.spec.whatwg.org/.

var xhr = new XMLHttpRequest();
xhr.open("GET", "https://www.codecademy.com/", false);
xhr.send();

console.log(xhr.status);
console.log(xhr.statusText);

https://github.com/whatwg/fetch

[annevk]

It means you shouldn't pass false as the third argument of open(). This is a duplicate of #20.

[xgqfrms-GitHub]

Thanks a lot!