try catch inside promise code example

Example 1: promise catch javascript

// errors that occur in asynchronous code inside promises cannot be caught with regular try/catch
// you need to pass the error handler into `.catch()`

fetchUserData(userId).then(console.log).catch(handleError);

Example 2: try catch throwing error in javascript

let json = '{ "age": 30 }'; // incomplete data

try {

  let user = JSON.parse(json); // <-- no errors
  alert( user.name ); // no name!

} catch (e) {
  alert( "doesn't execute" );
}

Tags:

Javascript Example

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