rondy

FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.

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Effective Engineer - Notes

• By Edmond Lau
• Highly Recommended 👍
• http://www.theeffectiveengineer.com/

What's an Effective Engineer?

buglessir

// 1) Using Boolean flag:

const [value, setValue] = useState('');
useEffect(() => {
  let isMounted = true;
  fetchValue().then(() => {
    if (isMounted) {
      setValue('done!'); // no more error
    }
  });