web-vitals
Version:
Easily measure performance metrics in JavaScript
22 lines (21 loc) • 842 B
TypeScript
export declare const initMetric: <MetricName extends "CLS" | "FCP" | "FID" | "INP" | "LCP" | "TTFB">(name: MetricName, value?: number) => {
name: MetricName;
value: number;
rating: "good";
delta: number;
entries: (Extract<import("../types.js").CLSMetric, {
name: MetricName;
}> | Extract<import("../types.js").FCPMetric, {
name: MetricName;
}> | Extract<import("../types.js").FIDMetric, {
name: MetricName;
}> | Extract<import("../types.js").INPMetric, {
name: MetricName;
}> | Extract<import("../types.js").LCPMetric, {
name: MetricName;
}> | Extract<import("../types.js").TTFBMetric, {
name: MetricName;
}>)["entries"];
id: string;
navigationType: "navigate" | "reload" | "back-forward" | "back-forward-cache" | "prerender" | "restore";
};