[Flare] Fix isTouchEvent (#15824)

trueadm · web-flow · commit cfb79ee5b3d7 · 2019-06-04T23:58:11.000+01:00
diff --git a/packages/react-events/src/Press.js b/packages/react-events/src/Press.js
@@ -467,7 +467,8 @@ function calculateResponderRegion(
 }
 
 function isTouchEvent(nativeEvent: Event): boolean {
-  return Array.isArray((nativeEvent: any).changedTouches);
+  const changedTouches = ((nativeEvent: any): TouchEvent).changedTouches;
+  return changedTouches && typeof changedTouches.length === 'number';
 }
 
 function getTouchFromPressEvent(nativeEvent: TouchEvent): Touch {

Original file line number	Diff line number	Diff line change
`@@ -467,7 +467,8 @@ function calculateResponderRegion(`
`467`	`467`	`}`
`468`	`468`
`469`	`469`	`function isTouchEvent(nativeEvent: Event): boolean {`
`470`		`- return Array.isArray((nativeEvent: any).changedTouches);`
	`470`	`+ const changedTouches = ((nativeEvent: any): TouchEvent).changedTouches;`
	`471`	`+ return changedTouches && typeof changedTouches.length === 'number';`
`471`	`472`	`}`
`472`	`473`
`473`	`474`	`function getTouchFromPressEvent(nativeEvent: TouchEvent): Touch {`