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deepGet/Set()

Published Aug 14, 2024

function deepGet(obj, key) {
	const parts = key.split('.');
	let curr = obj, part;
	while (curr !== undefined && curr !== null && (part = parts.shift())) {
		curr = curr[part];
	}
	return parts.length ? undefined : curr;
}

function deepSet(obj, key, val) {
	const parts = key.split('.');
	const last_key = parts.pop();
	let curr = obj, part;
	while ((part = parts.shift())) {
		if (!Object.hasOwn(curr, part)) {
			curr[part] = {};
		}
		curr = curr[part];
	}
	curr[last_key] = val;
}