Function getFCP

Gets the first contentful paint (FCP) time of a web page using the Performance API. The FCP time is the time it takes for the first piece of content to be painted on the screen.

Usage:

import { getFCP } from "mazey";

getFCP().then(
 res => {
  console.log(`FCP: ${res}`);
 }
);
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Output:

FCP: 123
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