miguelmota

const { providers } = require('ethers')

async function main() {
  const url1 = 'https://optimism-mainnet.infura.io/v3/84842078b09946638c03157f83405213'
  const url2 = 'https://mainnet.optimism.io'
  const stallTimeout = 2 * 1000
  const options = {
    timeout: 60 * 1000,
    throttleLimit: 1
  }

paulirish

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

• elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent