Is there a way to stub/intercept a javascript statement 'throw' in vanilla javascript?

Question

We can stub any function or class like this,

class ErrorStub{
        constructor(message){
                // do whatever with 'message'
        }
}
Error = ErrorStub
new Error('This will go to ErrorStub now')

Similar to this, is there any way we can intercept a 'throw' statement. So that whatever exception is thrown across whole website, can be handled in one place?

Answer 1

Wouldn't this satisfy your needs? You would need to listen to the error event, handle it the way you want and return false

function interceptError(exception) {
  // Here you can write code which intercepts before
  // the error gets triggered and printed in the console
  alert(`Exception occured: ${exception.message}`)
}

window.addEventListener("error", function (e) {
  interceptError(e);
  return false;
})

throw new Error('Test exception');