Rename when arguments to be clearer

README.md

@@ -208,11 +208,11 @@ merge(obj)
 ```js
 // Conditionally execute a function to continue configuration
 // condition: Boolean
-// truthyHandler: Function -> ChainedMap
+// whenTruthy: Function -> ChainedMap
   // invoked when condition is truthy, given a single argument of the ChainedMap instance
-// falsyHandler: Function -> ChainedMap
+// whenFalsy: Optional Function -> ChainedMap
   // invoked when condition is falsy, given a single argument of the ChainedMap instance
-when(condition, truthyHandler, falsyHandler)
+when(condition, whenTruthy, whenFalsy)
 ```
 
 ## ChainedSet
@@ -269,11 +269,11 @@ merge(arr)
 ```js
 // Conditionally execute a function to continue configuration
 // condition: Boolean
-// truthyHandler: Function -> ChainedSet
+// whenTruthy: Function -> ChainedSet
   // invoked when condition is truthy, given a single argument of the ChainedSet instance
-// falsyHandler: Function -> ChainedSet
+// whenFalsy: Optional Function -> ChainedSet
   // invoked when condition is falsy, given a single argument of the ChainedSet instance
-when(condition, truthyHandler, falsyHandler)
+when(condition, whenTruthy, whenFalsy)
 ```
 
 ## Shorthand methods

src/ChainedMap.js

@@ -82,11 +82,11 @@ module.exports = class extends Chainable {
       }, {});
   }
 
-  when(condition, trueBrancher = Function.prototype, falseBrancher = Function.prototype) {
+  when(condition, whenTruthy = Function.prototype, whenFalsy = Function.prototype) {
     if (condition) {
-      trueBrancher(this);
+      whenTruthy(this);
     } else {
-      falseBrancher(this);
+      whenFalsy(this);
     }
 
     return this;

src/ChainedSet.js

@@ -39,11 +39,11 @@ module.exports = class extends Chainable {
     return this;
   }
 
-  when(condition, trueBrancher = Function.prototype, falseBrancher = Function.prototype) {
+  when(condition, whenTruthy = Function.prototype, whenFalsy = Function.prototype) {
     if (condition) {
-      trueBrancher(this);
+      whenTruthy(this);
     } else {
-      falseBrancher(this);
+      whenFalsy(this);
     }
 
     return this;