RotateArtboard.js

@import 'common.js'

var onRun = function(context) {
    
    //reference the sketch document
	var doc = context.document;
	//reference what is selected
	var selection = context.selection;

	//make sure something is selected
	if(selection.count() == 0){
		doc.showMessage("Please select something.");
	}else{
		//loop through the selected layers
		for(var i = 0; i < selection.count(); i++){

			//checks to see if the layer is an artboard
			if(selection[i].class() == "MSArtboardGroup"){

				//reference the selection
				var artboard = selection[i];

				//get the artboard frame for dimensions
				var artboardFrame = artboard.frame();
				//get the width
				var artboardWidth = artboardFrame.width();
				//get the height
				var artboardHeight = artboardFrame.height();

				//set a new width variable to the old height
				var newArtboardWidth = artboardHeight;
				//set a new height variable to the old width
				var newArtboardHeight = artboardWidth;

				//set the artboard frame with the new dimensions
				artboardFrame.setWidth(newArtboardWidth);
				artboardFrame.setHeight(newArtboardHeight);

				//send an alert message with the new values
				var alertMessage = "New Height: "+newArtboardHeight+ " | New Width: "+newArtboardWidth;
				alert("Artboard Rotated!", alertMessage);
			}else{
				doc.showMessage("Please select an artboard.");
			}
		}
	}
}