Javascript Add Values to an Array of Objects

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Array of Objects Demo</title>
    <script>
        let arrayOfObjects = [
            {
                name: 'John',
                role: 'Developer'
            },
            {
                name: 'Andrew',
                role: 'Writer'
            }
        ];

</head>

<body>
    <h2>Array of Objects Demo</h2>

<p id="output">
        [
        {
        name: 'John',
        role: 'Developer'
        },
        {
        name: 'Andrew',
        role: 'Writer'
        }
        ];</p>
    <button onclick="displayArray()">Add Property to Array of Object</button>
</body>

</html>