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bottomMargin of type DOMString

Sets or retrieves the bottom margin of the entire body of the page.

The default value is 15 pixels. If the value is an empty string, the bottom margin is set on the bottom edge of the window or frame.

The specified value overrides the default margin. By default, when the value of this property is set, the opposite margin is set to the same value.

This attribute extends the HTMLBodyElement interface.