> For the complete documentation index, see [llms.txt](https://edsonha.gitbook.io/my-gitbook/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://edsonha.gitbook.io/my-gitbook/refactoring/clean-code/error-handling.md).

# Error Handling

```javascript
DON'T IGNORE CAUGHT ERRORS
Bad:
try {
  functionThatMightThrow();
} catch (error) {
  console.log(error);
}

Good:
try {
  functionThatMightThrow();
} catch (error) {
  // One option (more noisy than console.log):
  console.error(error);
  // Another option:
  notifyUserOfError(error);
  // Another option:
  reportErrorToService(error);
  // OR do all three!
}
```

```javascript
DON'T IGNORE REJECTED PROMISES
Bad:
getdata()
  .then(data => {
    functionThatMightThrow(data);
  })
  .catch(error => {
    console.log(error);
  });

Good:
getdata()
  .then(data => {
    functionThatMightThrow(data);
  })
  .catch(error => {
    // One option (more noisy than console.log):
    console.error(error);
    // Another option:
    notifyUserOfError(error);
    // Another option:
    reportErrorToService(error);
    // OR do all three!
  });
```