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Ethereum Provider Initialization Event

New event dispatched on window: ethereum#initialized

Event name inspired by JSDoc @event tag:

if (window.ethereum) {


} else {

    { once: true }

  // If the event is not dispatched by the end of the timeout,
  // the user probably doesn't have MetaMask installed.
  setTimeout(handleEthereum, 3000) // 3 seconds

function handleEthereum () {
  const { ethereum } = window
  if (ethereum && ethereum.isMetaMask) {
    console.log('Ethereum successfully detected!')
    // Do work...
  } else {
    console.log('Please install MetaMask!')
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