Expose fuse options in config

assets/scripts/src/choices.js

@@ -105,6 +105,11 @@ class Choices {
         flippedState: 'is-flipped',
         loadingState: 'is-loading',
       },
+      // Choices uses the great Fuse library for searching. You
+      // can find more options here: https://github.com/krisk/Fuse#options
+      fuseOptions: {
+        include: 'score',
+      },
       callbackOnInit: null,
       callbackOnCreateTemplates: null,
     };
@@ -1138,12 +1143,10 @@ class Choices {
       const haystack = this.store.getChoicesFilteredBySelectable();
       const needle = newValue;
       const keys = isType('Array', this.config.sortFields) ? this.config.sortFields : [this.config.sortFields];
-      const fuse = new Fuse(haystack, {
-        keys,
-        shouldSort: true,
-        include: 'score',
-      });
+      const options = Object.assign(this.config.fuseOptions, { keys });
+      const fuse = new Fuse(haystack, options);
       const results = fuse.search(needle);
+
       this.currentValue = newValue;
       this.highlightPosition = 0;
       this.isSearching = true;

tests/spec/choices_spec.js

@@ -2,6 +2,30 @@ import 'whatwg-fetch';
 import 'es6-promise';
 import Choices from '../../assets/scripts/src/choices.js';
 
+if (typeof Object.assign != 'function') {
+  Object.assign = function (target, varArgs) { // .length of function is 2
+    if (target == null) { // TypeError if undefined or null
+      throw new TypeError('Cannot convert undefined or null to object');
+    }
+
+    var to = Object(target);
+
+    for (var index = 1; index < arguments.length; index++) {
+      var nextSource = arguments[index];
+
+      if (nextSource != null) { // Skip over if undefined or null
+        for (var nextKey in nextSource) {
+          // Avoid bugs when hasOwnProperty is shadowed
+          if (Object.prototype.hasOwnProperty.call(nextSource, nextKey)) {
+            to[nextKey] = nextSource[nextKey];
+          }
+        }
+      }
+    }
+    return to;
+  };
+}
+
 describe('Choices', () => {
 
   afterEach(function() {