Error Handling

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!
}

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!
  });