JSFiddle - React, Tailwind, and code Playground

by silent water

HTML

hello2

JavaScript

window.addEventListener("load", () => {
    setTimeout(()=>{
      // Modern dapp browsers...
      if (window.ethereum) {
        alert(1111, window.ethereum)
      }
      // Legacy dapp browsers...
      else if (window.web3) {
        alert(22222, window.web3)
      } else {
         alert(333)
      }
    }, 2000)
  });