JAVASCRIPT

try catch javascript

try {
  // code may cause error
} catch(error){
  // code to handle error
}

try catch javascript

try {

  alert('Start of try runs');  // (1) <--

  lalala; // error, variable is not defined!

  alert('End of try (never reached)');  // (2)

} catch(err) {

  alert(`Error has occurred!`); // (3) <--

}

javascript try catch finally return

(function() {
  try {
    try {
      throw new Error('oops');
    } catch (ex) {
      console.error('inner', ex.message);
      throw ex;
    } finally {
      console.log('finally');
      return;
    }
  } catch (ex) {
    console.error('outer', ex.message);
  }
})();

// Output:
// "inner" "oops"
// "finally"

javascript try...catch...finally

const numerator= 100, denominator = 'a';

try {
     console.log(numerator/denominator);
     console.log(a);
}
catch(error) {
    console.log('An error caught'); 
    console.log('Error message: ' + error);  
}
finally {
     console.log('Finally will execute every time');
}

JavaScript try...catch...finally Statement

try {
    // try_statements
} 
catch(error) {
    // catch_statements  
}
finally() {
    // codes that gets executed anyway
}