Looping through arrays inside objects is the same as looping through objects. We have to use 'for...in' loop to loop through arrays inside objects.
Example
In the following example, an object "obj" is defined. This object has an array in it. Using 'for...in' loop, the elements in that array are displayed as shown in the output.
<html>
<body>
<script>
var res = ""
var obj = {
"name":"Elon musk",
"age":48,
"companies": [
{"location":"Newyork", "name":["Tesla", "Spacex", "Neuralink"]},
{"location":"Florida", "name":["paypal", "solarcity"]},
]
}
for (var i in obj.companies) {
res += "The companies in " + " "+ obj.companies[i].location + "</br>";
for (var j in obj.companies[i].name) {
res += obj.companies[i].name[j] + "</br>";
}
}
document.write(res);
</script>
</body>
</html>output
The companies in Newyork Tesla Spacex Neuralink The companies in Florida paypal solarcity