fix(UA): add failsafe if params not provided

fix #166

Author: bobylito

src/sources/hits.js

@@ -7,6 +7,7 @@ var parseAlgoliaClientVersion = require('../common/parseAlgoliaClientVersion.js'
 module.exports = function search(index, params) {
   var algoliaVersion = parseAlgoliaClientVersion(index.as._ua);
   if (algoliaVersion && algoliaVersion[0] >= 3 && algoliaVersion[1] > 20) {
+    params = params || {};
     params.additionalUA = 'autocomplete.js ' + version;
   }
   return sourceFn;

src/sources/popularIn.js

@@ -7,6 +7,7 @@ var parseAlgoliaClientVersion = require('../common/parseAlgoliaClientVersion.js'
 module.exports = function popularIn(index, params, details, options) {
   var algoliaVersion = parseAlgoliaClientVersion(index.as._ua);
   if (algoliaVersion && algoliaVersion[0] >= 3 && algoliaVersion[1] > 20) {
+    params = params || {};
     params.additionalUA = 'autocomplete.js ' + version;
   }
   if (!details.source) {

test/playground.html

@@ -52,7 +52,7 @@ <h4>Multi-sections auto-complete</h4>
 
       autocomplete('#contacts, #contacts1', { debug: true, hint: false, templates: { empty: 'empty' }, autoselect: true, appendTo: 'body' }, [
         {
-          source: autocomplete.sources.hits(index, { hitsPerPage: 5 }),
+          source: autocomplete.sources.hits(index),
           displayKey: 'name',
           templates: {
             footer: function(o, content) {