The dir read-only property of the Notification interface indicates the text direction of the notification, as specified in the dir option of the Notification() constructor.

A string specifying the text direction. Possible values are:

auto

adopts the browser's language setting behavior (the default.)

ltr

left to right.

rtl

right to left.

The following snippet fires a notification; a simple options object is created, then the notification is fired using the Notification() constructor.

const options = {
  body: "Your code submission has received 3 new review comments.",
  dir: "rtl",
};

const n = new Notification("New review activity", options);

console.log(n.dir); // "rtl"

• Using the Notifications API