JSON Add a Key to an object
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JSON Adding Keys to the object
In the following example, we will add new keys (married and partner) to the first object in an array (data) by using JSON's dot notation and bracket notation.
Example
HTML Editor
<!DOCTYPE html>
<html lang="en-US">
<body>
<h1>JSON Adding Keys to the object</h1>
<button onclick="myFunction()">Click Me</button>
<script>
var data = [
{
"name": "Mike",
"age": 36
}
]
function myFunction(){
// Adding a key (married) to the first object by using dot notation
data[0].married = true;
// Adding a key (partner) to the first object by using bracket notation
data[0]["partner"] = "Jade";
console.log(data);
}
</script>
</body>
</html>
Syntax
obj.newKey = "value";
//or
obj["newKey"] = "value";
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