If you have a string in dot notation, then use the concept of split(‘.’) along with a map() to convert dot notation to an object in JavaScript.
JavaScript dot notation to an object
A simple example code turns a string in dot notation into a nested object with a value.
<!DOCTYPE html>
<html>
<body>
<script type="text/javascript">
const keys = "details1.details2.details3.details4.details5"
const firsName = "David";
var tempObject = {};
var container = tempObject;
keys.split('.').map((k, i, values) => {
container = (container[k] = (i == values.length - 1 ? firsName : {}))
});
console.log(JSON.stringify(tempObject, null, ' '));
</script>
</body>
</html>
Output:
Convert a complex JavaScript object to a dot notation object
You can recursively add the properties to a new object, and then convert it to JSON:
<script type="text/javascript">
var obj = { "status": "success", "auth": { "code": "23123213", "name": "qwerty asdfgh" } };
var res = {};
(function recurse(obj, current) {
for(var key in obj) {
var value = obj[key];
var newKey = (current ? current + "." + key : key);
if(value && typeof value === "object") {
recurse(value, newKey);
} else {
res[newKey] = value;
}
}
})(obj);
var result = JSON.stringify(res);
console.log(result)
</script>Output:
{“status”:”success”,”auth.code”:”23123213″,”auth.name”:”qwerty asdfgh”}
Convert JavaScript dot notation object to nested object
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'
}));Output:
{
"ab": {
"cd": {
"e": "foo",
"f": "bar"
},
"g": "foo2"
}
}Do comment if you have any doubts or suggestions on this JS notation topic.
Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.
OS: Windows 10
Code: HTML 5 Version