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Error handling of Fetch API will be much different from the way of ajax.
Normally, when the back end returns a non 200 response, the front end may either deal with the response's statusText or the response's body.
Here are the snapshots (in our example, the response body is json):
response.statusText
fetch(query).then((response) => {
if (!response.ok) {
throw Error(response.statusText);
}
response.json().then((response) => {
console.log(response)
})
}).catch((error) => {
// caution: error (which is response.statusText) is a ByteString, so we may need to convert it to string by error.toString()
console.log(error.toString())
})
Error handling of Fetch API will be much different from the way of ajax.
Normally, when the back end returns a non 200 response, the front end may either deal with the response's statusText or the response's body.
Here are the snapshots (in our example, the response body is json):
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