move testForPassiveScroll to own file; export from util index

Author: jscottsmith

src/utils/index.js

@@ -3,18 +3,4 @@ export getParallaxOffsets from './getParallaxOffsets';
 export isElementInView from './isElementInView';
 export parseValueAndUnit from './parseValueAndUnit';
 export scaleBetween from './scaleBetween';
-
-export function testForPassiveScroll() {
-    let supportsPassiveOption = false;
-    try {
-        const opts = Object.defineProperty({}, 'passive', {
-            get: function() {
-                supportsPassiveOption = true;
-            },
-        });
-        window.addEventListener('test', null, opts);
-        window.removeEventListener('test', null, opts);
-    } catch (e) {}
-    return supportsPassiveOption;
-}
-
+export testForPassiveScroll from './testForPassiveScroll';

src/utils/testForPassiveScroll.js

@@ -0,0 +1,13 @@
+export default function testForPassiveScroll() {
+    let supportsPassiveOption = false;
+    try {
+        const opts = Object.defineProperty({}, 'passive', {
+            get: function() {
+                supportsPassiveOption = true;
+            },
+        });
+        window.addEventListener('test', null, opts);
+        window.removeEventListener('test', null, opts);
+    } catch (e) {}
+    return supportsPassiveOption;
+}