Error subclasses for Text and JSON fetch response bodies, and a handleResponse fuction to handle fetch responses cleanly.
MIT License
Error subclasses for Text and JSON fetch
response bodies, and a handleResponse
fuction to handle fetch responses cleanly.
npm install fetch-errors
const {
HTTPError,
TextHTTPError,
JSONHTTPError,
handleResponse
} = require('fetch-errors');
window.fetch('https://api.github.com/users/bcomnes/repos')
.then(handleResponse)
.then(json => { console.log(json); })
.catch(err => {
switch (err.constructor) {
case JSONHTTPError: {
console.error(err.message);
console.error(err.status);
console.error(err.json);
console.error(err.stack);
break;
}
case TextHTTPError: {
console.error(err.message);
console.error(err.status);
console.error(err.data);
console.error(err.stack);
break;
}
case HTTPError: {
console.error(err.message);
console.error(err.status);
console.error(err.stack);
break;
}
default: {
console.error(err);
break;
}
}
});
async handleResponse(response)
Parse JSON or text bodies of fetch
Response
objects. Intended for APIs that return JSON, but falls back to response.text()
body reading when the json
Content-type
is missing. If response.ok
, returns a JS object (if JSON), or the text content of the response body. Otherwise, returns a JSONHTTPError
or TextHTTPError
. If if response.json()
or resonse.text()
will throw their native error objects.
class HTTPError extends Error
Additional error properties from Error
{
stack, // stack trace of error
status // status code of response
}
class TextHTTPError extends HTTPError
Additional error properties from HTTPError
{
data // data of text response
}
class JSONHTTPError extends HTTPError
Additional error properties from HTTPError
{
json // json of a JSON response
}
MIT