You have to use multiple for loops to Convert nested JSON to flat JSON in JavaScript. Or can use a recursive function that iterates through the object and flattens it.
Convert nested JSON to flat JSON JavaScript
Simple example code will flat in 2-level JSON data.
<!DOCTYPE html>
<html>
<body>
<script>
var data=[
{
"a": "01AABCE2207R1Z5",
"b": "Y",
"c": [
{
"ca": "A",
"cb": "AflJufPlFStqKBZ",
"cc": "S008400"
},
{
"cx": "A",
"cy": "AflJufPlFStqKBZ",
"cz": "S008400"
}
]
},
{
"a": "01AABCE2207R1Z5",
"b": "Y",
"c": [
{
"ca": "A",
"cb": "AflJufPlFStqKBZ",
"cc": "S008400"
},
{
"cx": "A",
"cy": "AflJufPlFStqKBZ",
"cz": "S008400"
}
]
}
]
var flatArray = [];
var flatObject = {};
for (var index = 0; index < data.length; index++) {
for (var prop in data[index]) {
var value = data[index][prop];
if (Array.isArray(value)) {
for (var i = 0; i < value.length; i++) {
for (var inProp in value[i]) {
flatObject[inProp] = value[i][inProp];
}
}
}else{
flatObject[prop] = value;
}
}
flatArray.push(flatObject);
}
console.log(flatArray);
</script>
</body>
</html>
Output:
Here is an example recursive function:
function flattenJSON(obj) {
let result = {};
function recurse(cur, prop) {
if (Object(cur) !== cur) {
result[prop] = cur;
} else if (Array.isArray(cur)) {
for (let i = 0, l = cur.length; i < l; i++) {
recurse(cur[i], prop + "[" + i + "]");
}
if (l == 0) {
result[prop] = [];
}
} else {
let isEmpty = true;
for (let p in cur) {
isEmpty = false;
recurse(cur[p], prop ? prop + "." + p : p);
}
if (isEmpty && prop) {
result[prop] = {};
}
}
}
recurse(obj, "");
return result;
}
const nestedJSON = {
a: 1,
b: {
c: 2,
d: {
e: 3,
f: [4, 5, 6],
},
},
};
const flatJSON = flattenJSON(nestedJSON);
console.log(flatJSON);Do comment if you have any doubts or suggestions on this JS flat JSON topic.
Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.
OS: Windows 10
Code: HTML 5 Version