Runtime Error

What This Error Means

This error occurs when trying to call a method on a non-function value, in this case, a Promise that is pending or rejected

Why It Happens

This error typically happens when you're trying to access the 'then' or 'catch' methods of a Promise that hasn't been resolved or rejected yet. This can be due to a variety of reasons such as a network request taking too long, a database query failing, or a function not returning a Promise.

How to Fix It

1. 1To fix this error, you should ensure that the Promise is properly resolved or rejected before trying to call methods on it. You can do this by using 'async/await' or by checking the status of the Promise before calling methods on it. For example:
2. 2// Before (broken code)
3. 3const promise = new Promise((resolve, reject) => {
4. 4 // Code that takes too long to resolve
5. 5});
6. 6const result = promise.then(data => data);
7. 7// After (fixed code)
8. 8async function fetchData() {
9. 9 const promise = new Promise((resolve, reject) => {
10. 10 // Code that takes too long to resolve
11. 11 });
12. 12 const result = await promise;
13. 13 return result;
14. 14}

Example Code Solution

const promise = new Promise((resolve, reject) => {
  // Code that takes too long to resolve
});
const result = promise.then(data => data);

async function fetchData() {
  const promise = new Promise((resolve, reject) => {
    // Code that takes too long to resolve
  });
  const result = await promise;
  return result;
}