I believe this is what you’re after:
function deepen(obj) {
const result = {};
// For each object path (property key) in the object
for (const objectPath in obj) {
// Split path into component parts
const parts = objectPath.split('.');
// Create sub-objects along path as needed
let target = result;
while (parts.length > 1) {
const part = parts.shift();
target = target[part] = target[part] || {};
}
// Set value at end of path
target[parts[0]] = obj[objectPath]
}
return result;
}
// For example ...
console.log(deepen({
'ab.cd.e': 'foo',
'ab.cd.f': 'bar',
'ab.g': 'foo2'
}));