React quiz - re-render with memo()

memo() helps prevent unnecessary renders.

re-render with memo() (pass rate: 56%)react@18.3.1

{...}
import * as React from "react";
import { useState, useEffect, memo } from "react";
import { createRoot } from "react-dom/client";
function A() {
  console.log("A");
  return <B />;
}
const B = memo(() => {
  console.log("B");
  return <C />;
});
function C() {
  console.log("C");
  return null;
}
function D() {
  console.log("D");
  return null;
}
function App() {
  const [state, setState] = useState(0);
  useEffect(() => {
    setState((state) => state + 1);
  }, []);
  console.log("App");
  return (
    <div>
      <A />
      <D />
    </div>
  );
}
const root = createRoot(document.getElementById("root"));
root.render(<App />);

{...}
import * as React from "react";
import { useState, useEffect, memo } from "react";
import { createRoot } from "react-dom/client";
function A() {
  console.log("A");
  return <B />;
}
const B = memo(() => {
  console.log("B");
  return <C />;
});
function C() {
  console.log("C");
  return null;
}
function D() {
  console.log("D");
  return null;
}
function App() {
  const [state, setState] = useState(0);
  useEffect(() => {
    setState((state) => state + 1);
  }, []);
  console.log("App");
  return (
    <div>
      <A />
      <D />
    </div>
  );
}
const root = createRoot(document.getElementById("root"));
root.render(<App />);

What gets logged in order?

click on the console.log lines to input your answer.