The resize event of the VisualViewport interface is fired when the visual viewport is resized.

Use the event name in methods like addEventListener(), or set an event handler property.

addEventListener("resize", (event) => {});

onresize = (event) => {};

A generic Event.

You can use the resize event in an addEventListener method:

visualViewport.addEventListener("resize", () => {
  // …
});

Or use the onresize event handler property:

visualViewport.onresize = () => {
  // …
};

• Visual Viewport API homepage