Table of Contents

• Basic Syntax
• Example

Basic Syntax

The try/catch/finally statement handles some or all of the errors that may occur in a block of code, while still running code. Errors can be coding errors made by the programmer, errors due to wrong input, and other unforeseeable things. The try statement allows you to define a block of code to be tested for errors while it is being executed. The catch statement allows you to define a block of code to be executed, if an error occurs in the try block. The finally statement lets you execute code, after try and catch, regardless of the result. You can raise an error with throw().

try {
  tryCode - Block of code to try
}
catch(err) {
  catchCode - Block of code to handle errors
}
finally {
  finallyCode - Block of code to be executed regardless of the try / catch result
}

throw("Raise an error");

Example

let v = "";

try {
  if (v == "") throw "The value is empty";
}
catch (err) {
  console.log(`Message: ${err}`); //=> Message: The value is empty
}
finally {
  console.log("Everything is done!"); //=> Everything is done!
}