JavaScript open in a new window, not tab

Specify window “features” to the open call:

window.open(url, windowName, "height=200,width=200");

When you specify a width/height, it will open it in a new window instead of a tab.

See https://developer.mozilla.org/en-US/docs/Web/API/Window.open#Position_and_size_features for all the possible features.

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