What is this javascript code?

I was reading a JavaScript tutorial and saw the code below. I am confused by the parameters ({top = 0, right = 0, className, html})

Is that some way to set the values for an object?

Thanks for any clarification.

[code]
function showNotification({top = 0, right = 0, className, html}) {

let notification = document.createElement(‘div’);
notification.className = “notification”;
if (className) {
notification.classList.add(className);
}

notification.style.top = top + ‘px’;
notification.style.right = right + ‘px’;

notification.innerHTML = html;
document.body.append(notification);

setTimeout(() => notification.remove(), 1500);
}

// test it
let i = 1;
setInterval(() => {
showNotification({
top: 10,
right: 10,
html: ‘Hello ‘ + i++,
className: “welcome”
});
}, 2000);
[/code]

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