<!DOCTYPE html>
<meta charset="utf-8">
<title>ok</title>
<script>
function try_fetch(url) {
return fetch(url).then(
response => {
return "ok";
},
err => {
return err.name;
}
);
}
function try_fetch_status(url) {
return fetch(url).then(
response => {
return response.status;
},
err => {
return err.name;
}
);
}
</script>