time.Duration workaround using javascript.

[figuerom16]

Sorry this isn't an issue so much as a work around for time.Duration (int64) using Javascript.
You can do progressive form enhancement on the client and convert a golang time.Duration string to nanoseconds using the below function.

const NANO_MULTIPLIERS = {
	ns: 1,
	us: 1000,
	ms: 1000 * 1000,
	s: 1000 * 1000 * 1000,
	m: 60 * 1000 * 1000 * 1000,
	h: 60 * 60 * 1000 * 1000 * 1000,
}

function durationToNanos(durationString) {// This is golang specific. eg. 72h30m1s100ms10us5ns
	if (!durationString) return 0
	let totalNanoseconds = 0
	let lastIndex = 0
	const matches = [...durationString.matchAll(/(\d+)(ns|us|ms|s|m|h)/g)]
	if (matches.length === 0 && durationString.length > 0) throw new Error(`Invalid duration string format: "${durationString}"`)
	for (const match of matches) {
		totalNanoseconds += parseInt(match[1], 10) * NANO_MULTIPLIERS[match[2]]
		lastIndex = match.index + match[0].length
	}
	if (lastIndex !== durationString.length) throw new Error(`Invalid characters found in duration string: "${durationString}"`)
	return totalNanoseconds
}

Hopefully someone finds this useful in the future.