Fixed cycle from #97

src/array.js

@@ -1,4 +1,4 @@
-import value from "./value.js";
+import { value } from "./value_object.js";
 import numberArray, {isNumberArray} from "./numberArray.js";
 
 export default function(a, b) {

src/index.js

@@ -1,4 +1,4 @@
-export {default as interpolate} from "./value.js";
+export {value as interpolate, object as interpolateObject} from "./value_object.js";
 export {default as interpolateArray} from "./array.js";
 export {default as interpolateBasis} from "./basis.js";
 export {default as interpolateBasisClosed} from "./basisClosed.js";
@@ -7,7 +7,6 @@ export {default as interpolateDiscrete} from "./discrete.js";
 export {default as interpolateHue} from "./hue.js";
 export {default as interpolateNumber} from "./number.js";
 export {default as interpolateNumberArray} from "./numberArray.js";
-export {default as interpolateObject} from "./object.js";
 export {default as interpolateRound} from "./round.js";
 export {default as interpolateString} from "./string.js";
 export {interpolateTransformCss, interpolateTransformSvg} from "./transform/index.js";

src/piecewise.js

@@ -1,4 +1,4 @@
-import {default as value} from "./value.js";
+import { value } from "./value_object";
 
 export default function piecewise(interpolate, values) {
   if (values === undefined) values = interpolate, interpolate = value;

src/value.js → src/value_object.js

@@ -8,7 +8,7 @@ import string from "./string.js";
 import constant from "./constant.js";
 import numberArray, {isNumberArray} from "./numberArray.js";
 
-export default function(a, b) {
+export function value(a, b) {
   var t = typeof b, c;
   return b == null || t === "boolean" ? constant(b)
       : (t === "number" ? number
@@ -20,3 +20,25 @@ export default function(a, b) {
       : typeof b.valueOf !== "function" && typeof b.toString !== "function" || isNaN(b) ? object
       : number)(a, b);
 }
+
+export function object(a, b) {
+  var i = {},
+      c = {},
+      k;
+
+  if (a === null || typeof a !== "object") a = {};
+  if (b === null || typeof b !== "object") b = {};
+
+  for (k in b) {
+    if (k in a) {
+      i[k] = value(a[k], b[k]);
+    } else {
+      c[k] = b[k];
+    }
+  }
+
+  return function(t) {
+    for (k in i) c[k] = i[k](t);
+    return c;
+  };
+}