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danielfone/client-offset.js

Created June 21, 2021 03:04
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client-offset.js
reqTx = new Date();
await fetch("/now")
.then((response) => {
respRx = new Date();
return response.text();
})
.then((d) => {
rtt = respRx - reqTx;
expected = new Date(respRx - rtt / 2);
serverTime = new Date(d);
offset = serverTime - expected;
console.log({ reqTx, respRx, rtt, expected, serverTime, offset });
});
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