alert error in javascript

index.tsx
// throw an error with custom message
throw new Error('Something went wrong!');

// throw an error with default message
throw new Error();
139 chars
6 lines

index.tsx
try {
  // some code that may throw an error
} catch(error) {
  // display the error message
  alert('An error occurred: ' + error.message);
}
143 chars
7 lines