Handle response - SyntaxError: Unexpected end of input when using mode: 'no-cors'

Question

I tried a ReactJS fetch call to a REST-API and want to handle the response. The call works, i get a response, which i can see in Chrome Dev Tools:

function g         


        

Answer 1

In your then you should check if the response is OK before returning response.json:

.then(function (response) {
    if (!response.ok) {
        return Promise.reject('some reason');
    }

    return response.json();

})

If you want to have the error message in your rejected promise, you can do something like:

.then(function (response) {
    if (!response.ok) {
       return response.text().then(result => Promise.reject(new Error(result)));
    }

    return response.json();
})