add easing option

Author: callmecavs

README.md

@@ -126,12 +126,12 @@ Jump.jump('.selector', {
 
 ##### easing
 
-Easing function to be used for the transition.
+Easing function used to transition the `jump()`.
 
 ```es6
 Jump.jump('.selector', {
   easing: (t, b, c, d) => {
-    return c * ( t /= d) * t + b
+    return c * (t /= d) * t + b
   }
 })
 ```

dist/jump.min.js

@@ -1,6 +1,6 @@
 {
   "name":        "jump.js",
-  "version":     "0.1.3",
+  "version":     "0.2.0",
   "description": "A small, modern, dependency-free smooth scrolling library.",
   "homepage":    "https://github.com/callmecavs/jump.js",
   "main":        "dist/jump.min.js",

package.json

@@ -0,0 +1,8 @@
+// Robert Penner's easeInOutQuad - http://robertpenner.com/easing/
+
+export default (t, b, c, d) => {
+  t /= d / 2
+  if(t < 1) return c / 2 * t * t + b
+  t--
+  return -c / 2 * (t * (t - 2) - 1) + b
+}

src/easing.js

@@ -1,10 +1,4 @@
-const easeInOutQuad = (t, b, c, d) => {
-  // Robert Penner's easeInOutQuad - http://robertpenner.com/easing/
-  t /= d / 2
-  if(t < 1) return c / 2 * t * t + b
-  t--
-  return -c / 2 * (t * (t - 2) - 1) + b
-}
+import easeInOutQuad from './easing'
 
 export default class Jump {
   jump(target, options = {}) {