fix(event): fix referencing event element

Make sure referencing event rect element when updating event rect's
dimension.

Fix #1752

src/ChartInternal/interactions/eventrect.ts

@@ -173,23 +173,24 @@ export default {
 		const $$ = this;
 		const {state, $el} = $$;
 		const {eventReceiver, width, height, rendered, resizing} = state;
+		const rectElement = eventRect || $el.eventRect;
 
 		const updateClientRect = (): void => {
 			eventReceiver && (
-				eventReceiver.rect = (eventRect || $el.eventRect).node().getBoundingClientRect()
+				eventReceiver.rect = rectElement.node().getBoundingClientRect()
 			);
 		};
 
 		if (!rendered || resizing) {
-			const rect = eventRect
+			rectElement
 				.attr("x", 0)
 				.attr("y", 0)
 				.attr("width", width)
 				.attr("height", height);
 
 			// only for init
 			if (!rendered) {
-				rect.attr("class", CLASS.eventRect);
+				rectElement.attr("class", CLASS.eventRect);
 			}
 		}
 

test/api/chart-spec.ts

@@ -91,6 +91,15 @@ describe("API chart", () => {
 
 			expect(+eventRect.attr("height")).to.be.above(height);
 		});
+
+		it("updating event rect during resize state", () => {
+			// force resizing state
+			chart.internal.state.resizing = true;
+
+			expect(
+				chart.internal.updateEventRect()
+			).to.not.throw;
+		});
 	});
 
 	describe("destroy()", () => {