The onresize event fires whenever you change the sized of your browser window. Eg it occurs when you maximize the window or when you click-and-drag on the corne

The onresize event fires whenever you change the sized of your browser window. Eg it occurs when you maximize the window or when you click-and-drag on the corner of the window in order to make it smaller or larger. See also https://developer.mozilla.org/en-US/docs/DOM/window.onresize https://developer.mozilla.org/en-US/docs/DOM/window.onresize