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1 try..catch finally :

          try {
  work work
} catch (e) {
  handle errors
} finally {
  
}
        

2 try..catch :

          try {
  work work
} catch (e) {
  handle errors
}


        

finally

try..catch

try..catch return finally try..catch return

function f() {
  try {
    alert('start');
    return "result";
  } catch (e) {
    /// ...
  } finally {
    alert('cleanup!');
  }
}

f(); // cleanup!

throw :

function f() {
  try {
    alert('start');
    throw new Error("an error");
  } catch (e) {
    // ...
    if("can't handle the error") {
      throw e;
    }

  } finally {
    alert('cleanup!')
  }
}

f(); // cleanup!

finally f

Finally or just the code?