Forcing "Sketch"(rectangle) to an equal-sided Square

Paco

Hello all!    wondering if there is a way to make the Sketch widget create an equal-sided Square, instead of a Rectangle?   the rectangle selection mode works great,  but I need the selection to be a square.

 

Thanks again!

pvs

Paco

Thanks.   however my polygon/rectangle Sketch does not seem to be affected by the shift key?   but I will look into it further.   thankyou!

glayer = new GraphicsLayer();

const sketch = new Sketch({
layer: glayer,
view: view,
creationMode: "single",
availableCreateTools: ["point", "polyline", "rectangle"],
layout: "vertical",
label:"select a drawing tool for "
});