Answers for "then catch error javascript"

javascript try catch

var someNumber = 1;
try {
  someNumber.replace("-",""); //You can't replace a int
} catch(err) {
 console.log(err);
}

javascript catch specific error

try {
  myRoutine();
} catch (e) {
  if (e instanceof RangeError) {
    // statements to handle this very common expected error
  } else {
    throw e;  // re-throw the error unchanged
  }
}