Variable perfsAddonConst

Adds the ability to measure requests using the Performance Timings API.

Uses the Performance API (browsers & node.js) to expose timings related to the underlying request.

Browser timings are very accurate, node.js only contains raw measures.

import PerfsAddon from "wretch/addons/perfs"

// Use perfs() before the response types (text, json, ...)
wretch("...")
  .addon(PerfsAddon())
  .get()
  .perfs((timings) => {
    // Will be called when the timings are ready.
console.log(timings.startTime);
  })
  .res();

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