Recommended Way to Handle Error in Netlify Functions (lamdba)

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#1

Really like netlify functions. Yet I’m wondering what’s the recommended/best way to handle errors in lambda functions. Can we just throw new Error in the lambda and .catch it in the client ?

#2

You don’t need to ‘throw’ an error in Lamda. You can just do something like:

fetch('/.netlify/functions/foo/', {method: 'POST'}).then(response => {
  if (response.ok) {
    return response // or response.json()
  } else {
    throw response.statusText
  }).then(data => {
    // process the data here
  }).catch(error => console.log(error))

Anything that won’t return a valid response will automatically be treated as an error. In most cases, it will return a 500 error. However, if you want the complete error text, you could return that error as a JSON string and use it client-side.