score:0
there are two types of error that might defeat a fetch request, either the link doesn't exist, or a link exists but doesn't have data to be read. a error-catch block can be used to log the error without crashing the programme. i have used the following structure to fetch from a few thousand generated links where every now and then, one of the links is bad or the json data not present. it prevented crashes and reported silently to console.
fetch(`${url}`)
.then(response => {
if (!response.ok){throw new error ('bad response');}
else { return response.json()};
})
.then(data => {
// process data here or pass to processing function;
parsedata(data)
})
.catch(error => {
// if in a loop can also log which url failed;
console.log('error made: ', error);
});
Source: stackoverflow.com
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