如何在浏览器中运行自己的控制台?

var oLog = window.console.log;

console.log = (s) => {
  var d = document.createElement("div");
  d.classList.add("logger");
  d.innerText = s;
  document.body.appendChild(d);
  oLog(s); //if you still want to call old
}

console.log("hello");
console.log("there");

.logger {
  background-color: pink;
}