Amethyst’s window will emit these events when window state changes alt text

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window:maximize

Emits when the window is maximized 
amethyst.on("window:maximize");

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window:unmaximize

Emits when the window is unmaximized 
amethyst.on("window:unmaximize");

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window:minimize

Emits when the window is minimized 
amethyst.on("window:minimize");

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window:focus

Emits when the window is focused 
amethyst.on("window:focus");

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window:unfocus

Emits when the window is unfocused 
amethyst.on("window:unfocus");