Merge pull request #6653 from epixa/letconst

[internal] Replace empty var declarations with let

src/server/config/__tests__/config.js

@@ -85,7 +85,7 @@ describe('lib/config/config', function () {
 
     describe('#resetTo(object)', function () {
 
-      var config;
+      let config;
       beforeEach(function () {
         config = new Config(schema);
       });
@@ -102,7 +102,7 @@ describe('lib/config/config', function () {
 
     describe('#has(key)', function () {
 
-      var config;
+      let config;
       beforeEach(function () {
         config = new Config(schema);
       });
@@ -122,7 +122,7 @@ describe('lib/config/config', function () {
     });
 
     describe('#set(key, value)', function () {
-      var config;
+      let config;
 
       beforeEach(function () {
         config = new Config(schema);
@@ -171,7 +171,7 @@ describe('lib/config/config', function () {
 
     describe('#get(key)', function () {
 
-      var config;
+      let config;
 
       beforeEach(function () {
         config = new Config(schema);
@@ -210,7 +210,7 @@ describe('lib/config/config', function () {
     });
 
     describe('#extendSchema(key, schema)', function () {
-      var config;
+      let config;
       beforeEach(function () {
         config = new Config(schema);
       });

src/server/config/flatten_with.js

@@ -1,6 +1,6 @@
 import _ from 'lodash';
 module.exports = function (dot, nestedObj, flattenArrays) {
-  var key; // original key
+  let key; // original key
   var stack = []; // track key stack
   var flatObj = {};
   (function flattenObj(obj) {

src/server/status/__tests__/server_status.js

@@ -7,8 +7,8 @@ import Status from '../status';
 import ServerStatus from '../server_status';
 
 describe('ServerStatus class', function () {
-  var server;
-  var serverStatus;
+  let server;
+  let serverStatus;
 
   beforeEach(function () {
     server = { expose: sinon.stub(), log: sinon.stub() };

src/server/status/__tests__/status.js

@@ -4,8 +4,8 @@ import Status from '../status';
 import ServerStatus from '../server_status';
 
 describe('Status class', function () {
-  var server;
-  var serverStatus;
+  let server;
+  let serverStatus;
 
   beforeEach(function () {
     server = { expose: sinon.stub(), log: sinon.stub() };

src/ui/public/agg_response/geo_json/__tests__/geo_json.js

@@ -9,11 +9,11 @@ import AggResponseTabifyTabifyProvider from 'ui/agg_response/tabify/tabify';
 import AggResponseGeoJsonGeoJsonProvider from 'ui/agg_response/geo_json/geo_json';
 
 describe('GeoJson Agg Response Converter', function () {
-  var vis;
-  var tabify;
-  var convert;
-  var esResponse;
-  var aggs;
+  let vis;
+  let tabify;
+  let convert;
+  let esResponse;
+  let aggs;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(ngMock.inject(function (Private) {
@@ -108,10 +108,10 @@ describe('GeoJson Agg Response Converter', function () {
         describe('includes one feature per row in the table', function () {
           this.timeout(60000);
 
-          var table;
-          var chart;
-          var geoColI;
-          var metricColI;
+          let table;
+          let chart;
+          let geoColI;
+          let metricColI;
 
           before(function () {
             table = makeTable();

src/ui/public/agg_response/hierarchical/__tests__/array_to_linked_list.js

@@ -4,7 +4,7 @@ import expect from 'expect.js';
 describe('buildHierarchicalData()', function () {
   describe('arrayToLinkedList', function () {
 
-    var results;
+    let results;
     beforeEach(function () {
       results = arrayToLinkedList([
         { id: 1 },

src/ui/public/agg_response/hierarchical/__tests__/build_hierarchical_data.js

@@ -9,11 +9,11 @@ import VisAggConfigsProvider from 'ui/vis/agg_configs';
 import FixturesStubbedLogstashIndexPatternProvider from 'fixtures/stubbed_logstash_index_pattern';
 import AggResponseHierarchicalBuildHierarchicalDataProvider from 'ui/agg_response/hierarchical/build_hierarchical_data';
 
-var Vis;
-var Notifier;
-var AggConfigs;
-var indexPattern;
-var buildHierarchicalData;
+let Vis;
+let Notifier;
+let AggConfigs;
+let indexPattern;
+let buildHierarchicalData;
 
 describe('buildHierarchicalData', function () {
 
@@ -31,8 +31,8 @@ describe('buildHierarchicalData', function () {
 
 
   describe('metric only', function () {
-    var vis;
-    var results;
+    let vis;
+    let results;
 
     beforeEach(function () {
       var id = 1;
@@ -103,8 +103,8 @@ describe('buildHierarchicalData', function () {
   });
 
   describe('threeTermBuckets', function () {
-    var vis;
-    var results;
+    let vis;
+    let results;
 
     beforeEach(function () {
       var id = 1;
@@ -145,8 +145,8 @@ describe('buildHierarchicalData', function () {
   });
 
   describe('oneHistogramBucket', function () {
-    var vis;
-    var results;
+    let vis;
+    let results;
 
     beforeEach(function () {
       var id = 1;
@@ -177,8 +177,8 @@ describe('buildHierarchicalData', function () {
   });
 
   describe('oneRangeBucket', function () {
-    var vis;
-    var results;
+    let vis;
+    let results;
 
     beforeEach(function () {
       var id = 1;
@@ -218,8 +218,8 @@ describe('buildHierarchicalData', function () {
   });
 
   describe('oneFilterBucket', function () {
-    var vis;
-    var results;
+    let vis;
+    let results;
 
     beforeEach(function () {
       var id = 1;
@@ -254,8 +254,8 @@ describe('buildHierarchicalData', function () {
   });
 
   describe('oneFilterBucket that is a split', function () {
-    var vis;
-    var results;
+    let vis;
+    let results;
 
     beforeEach(function () {
       var id = 1;

src/ui/public/agg_response/hierarchical/__tests__/collect_branch.js

@@ -3,7 +3,7 @@ import _ from 'lodash';
 import collectBranch from 'ui/agg_response/hierarchical/_collect_branch';
 import expect from 'expect.js';
 describe('collectBranch()', function () {
-  var results;
+  let results;
   var convert = function (name) {
     return 'converted:' + name;
   };

src/ui/public/agg_response/hierarchical/__tests__/create_raw_data.js

@@ -9,14 +9,14 @@ import VisProvider from 'ui/vis';
 import VisAggConfigsProvider from 'ui/vis/agg_configs';
 import FixturesStubbedLogstashIndexPatternProvider from 'fixtures/stubbed_logstash_index_pattern';
 
-var AggConfigs;
-var Vis;
-var indexPattern;
+let AggConfigs;
+let Vis;
+let indexPattern;
 
 describe('buildHierarchicalData()', function () {
   describe('createRawData()', function () {
-    var vis;
-    var results;
+    let vis;
+    let results;
 
     beforeEach(ngMock.module('kibana'));
 

src/ui/public/agg_response/hierarchical/__tests__/transform_aggregation.js

@@ -5,8 +5,8 @@ import AggResponseHierarchicalTransformAggregationProvider from 'ui/agg_response
 
 describe('buildHierarchicalData()', function () {
   describe('transformAggregation()', function () {
-    var transform;
-    var fixture;
+    let transform;
+    let fixture;
 
     beforeEach(ngMock.module('kibana'));
     beforeEach(ngMock.inject(function (Private) {

src/ui/public/agg_response/hierarchical/_array_to_linked_list.js

@@ -1,6 +1,6 @@
 import _ from 'lodash';
 export default function (buckets) {
-  var previous;
+  let previous;
   _.each(buckets, function (bucket) {
     if (previous) {
       bucket._previous = previous;

src/ui/public/agg_response/hierarchical/_hierarchical_tooltip_formatter.js

@@ -21,7 +21,7 @@ export default function HierarchicalTooltipFormaterProvider($rootScope, $compile
       _.forEachRight($tooltipScope.rows, function (row, i, rows) {
         row.spacer = $sce.trustAsHtml(_.repeat(' ', row.depth));
 
-        var percent;
+        let percent;
         if (row.item.percentOfGroup != null) {
           percent = row.item.percentOfGroup;
         }

src/ui/public/agg_response/point_series/__tests__/_add_to_siri.js

@@ -2,7 +2,7 @@ import expect from 'expect.js';
 import ngMock from 'ng_mock';
 import AggResponsePointSeriesAddToSiriProvider from 'ui/agg_response/point_series/_add_to_siri';
 describe('addToSiri', function () {
-  var addToSiri;
+  let addToSiri;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(ngMock.inject(function (Private) {

src/ui/public/agg_response/point_series/__tests__/_fake_x_aspect.js

@@ -6,11 +6,11 @@ import AggTypesAggTypeProvider from 'ui/agg_types/agg_type';
 import AggResponsePointSeriesFakeXAspectProvider from 'ui/agg_response/point_series/_fake_x_aspect';
 describe('makeFakeXAspect', function () {
 
-  var makeFakeXAspect;
-  var Vis;
-  var AggType;
-  var AggConfig;
-  var indexPattern;
+  let makeFakeXAspect;
+  let Vis;
+  let AggType;
+  let AggConfig;
+  let indexPattern;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(ngMock.inject(function (Private) {

src/ui/public/agg_response/point_series/__tests__/_get_aspects.js

@@ -9,11 +9,11 @@ import AggResponsePointSeriesGetAspectsProvider from 'ui/agg_response/point_seri
 import FixturesStubbedLogstashIndexPatternProvider from 'fixtures/stubbed_logstash_index_pattern';
 describe('getAspects', function () {
 
-  var Vis;
-  var Table;
-  var AggConfig;
-  var indexPattern;
-  var getAspects;
+  let Vis;
+  let Table;
+  let AggConfig;
+  let indexPattern;
+  let getAspects;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(ngMock.inject(function (Private) {
@@ -24,8 +24,8 @@ describe('getAspects', function () {
     indexPattern = Private(FixturesStubbedLogstashIndexPatternProvider);
   }));
 
-  var vis;
-  var table;
+  let vis;
+  let table;
 
   var date = _.memoize(function (n) {
     return moment().startOf('day').add(n, 'hour').valueOf();

src/ui/public/agg_response/point_series/__tests__/_get_point.js

@@ -5,7 +5,7 @@ import AggResponsePointSeriesGetPointProvider from 'ui/agg_response/point_series
 
 describe('getPoint', function () {
 
-  var getPoint;
+  let getPoint;
 
   var truthFormatted = { fieldFormatter: _.constant(_.constant(true)) };
   var identFormatted = { fieldFormatter: _.constant(_.identity) };
@@ -16,10 +16,10 @@ describe('getPoint', function () {
   }));
 
   describe('Without series aspect', function () {
-    var seriesAspect;
-    var xAspect;
-    var yAspect;
-    var yScale;
+    let seriesAspect;
+    let xAspect;
+    let yAspect;
+    let yScale;
 
     beforeEach(function () {
       seriesAspect = null;
@@ -49,10 +49,10 @@ describe('getPoint', function () {
   });
 
   describe('With series aspect', function () {
-    var row;
-    var xAspect;
-    var yAspect;
-    var yScale;
+    let row;
+    let xAspect;
+    let yAspect;
+    let yScale;
 
     beforeEach(function () {
       row = [ { value: 1 }, { value: 2 }, { value: 3 }];

src/ui/public/agg_response/point_series/__tests__/_get_series.js

@@ -3,7 +3,7 @@ import expect from 'expect.js';
 import ngMock from 'ng_mock';
 import AggResponsePointSeriesGetSeriesProvider from 'ui/agg_response/point_series/_get_series';
 describe('getSeries', function () {
-  var getSeries;
+  let getSeries;
 
   var agg = { fieldFormatter: _.constant(_.identity) };
 

src/ui/public/agg_response/point_series/__tests__/_init_x_axis.js

@@ -4,7 +4,7 @@ import ngMock from 'ng_mock';
 import AggResponsePointSeriesInitXAxisProvider from 'ui/agg_response/point_series/_init_x_axis';
 describe('initXAxis', function () {
 
-  var initXAxis;
+  let initXAxis;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(ngMock.inject(function (Private) {

src/ui/public/agg_response/point_series/__tests__/_init_y_axis.js

@@ -4,7 +4,7 @@ import ngMock from 'ng_mock';
 import AggResponsePointSeriesInitYAxisProvider from 'ui/agg_response/point_series/_init_y_axis';
 describe('initYAxis', function () {
 
-  var initYAxis;
+  let initYAxis;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(ngMock.inject(function (Private) {

src/ui/public/agg_response/point_series/__tests__/_main.js

@@ -11,10 +11,10 @@ describe('pointSeriesChartDataFromTable', function () {
   this.slow(1000);
 
 
-  var pointSeriesChartDataFromTable;
-  var indexPattern;
-  var Table;
-  var Vis;
+  let pointSeriesChartDataFromTable;
+  let indexPattern;
+  let Table;
+  let Vis;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(ngMock.inject(function (Private) {

src/ui/public/agg_response/point_series/__tests__/_ordered_date_axis.js

@@ -28,7 +28,7 @@ describe('orderedDateAxis', function () {
     }
   };
 
-  var orderedDateAxis;
+  let orderedDateAxis;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(ngMock.inject(function (Private) {

src/ui/public/agg_response/point_series/__tests__/_tooltip_formatter.js

@@ -5,7 +5,7 @@ import ngMock from 'ng_mock';
 import AggResponsePointSeriesTooltipFormatterProvider from 'ui/agg_response/point_series/_tooltip_formatter';
 describe('tooltipFormatter', function () {
 
-  var tooltipFormatter;
+  let tooltipFormatter;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(ngMock.inject(function (Private) {

src/ui/public/agg_response/point_series/_get_series.js

@@ -37,7 +37,7 @@ export default function PointSeriesGetSeries(Private) {
     if (multiY) {
       series = _.sortBy(series, function (siri) {
         var firstVal = siri.values[0];
-        var y;
+        let y;
 
         if (firstVal) {
           var agg = firstVal.aggConfigResult.aggConfig;

src/ui/public/agg_response/tabify/__tests__/_buckets.js

@@ -2,7 +2,7 @@ import expect from 'expect.js';
 import ngMock from 'ng_mock';
 import AggResponseTabifyBucketsProvider from 'ui/agg_response/tabify/_buckets';
 describe('Buckets wrapper', function () {
-  var Buckets;
+  let Buckets;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(ngMock.inject(function (Private, $injector) {

src/ui/public/agg_response/tabify/__tests__/_get_columns.js

@@ -4,9 +4,9 @@ import AggResponseTabifyGetColumnsProvider from 'ui/agg_response/tabify/_get_col
 import VisProvider from 'ui/vis';
 import FixturesStubbedLogstashIndexPatternProvider from 'fixtures/stubbed_logstash_index_pattern';
 describe('get columns', function () {
-  var getColumns;
-  var Vis;
-  var indexPattern;
+  let getColumns;
+  let Vis;
+  let indexPattern;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(ngMock.inject(function (Private, $injector) {

src/ui/public/agg_response/tabify/__tests__/_integration.js

@@ -7,10 +7,10 @@ import VisProvider from 'ui/vis';
 import FixturesStubbedLogstashIndexPatternProvider from 'fixtures/stubbed_logstash_index_pattern';
 describe('tabifyAggResponse Integration', function () {
 
-  var Vis;
-  var Buckets;
-  var indexPattern;
-  var tabifyAggResponse;
+  let Vis;
+  let Buckets;
+  let indexPattern;
+  let tabifyAggResponse;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(ngMock.inject(function (Private, $injector) {
@@ -46,12 +46,12 @@ describe('tabifyAggResponse Integration', function () {
   describe('transforms a complex response', function () {
     this.slow(1000);
 
-    var vis;
-    var avg;
-    var ext;
-    var src;
-    var os;
-    var esResp;
+    let vis;
+    let avg;
+    let ext;
+    let src;
+    let os;
+    let esResp;
 
     beforeEach(function () {
       vis = new Vis(indexPattern, {

src/ui/public/agg_response/tabify/__tests__/_response_writer.js

@@ -10,14 +10,14 @@ import VisProvider from 'ui/vis';
 import FixturesStubbedLogstashIndexPatternProvider from 'fixtures/stubbed_logstash_index_pattern';
 describe('ResponseWriter class', function () {
 
-  var Vis;
-  var Table;
-  var Buckets;
-  var Private;
-  var TableGroup;
-  var getColumns;
-  var indexPattern;
-  var ResponseWriter;
+  let Vis;
+  let Table;
+  let Buckets;
+  let Private;
+  let TableGroup;
+  let getColumns;
+  let indexPattern;
+  let ResponseWriter;
 
   function defineSetup(stubGetColumns) {
     beforeEach(ngMock.module('kibana'));

src/ui/public/agg_response/tabify/__tests__/_table.js

@@ -4,7 +4,7 @@ import ngMock from 'ng_mock';
 import AggResponseTabifyTableProvider from 'ui/agg_response/tabify/_table';
 describe('Table class', function () {
 
-  var Table;
+  let Table;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(ngMock.inject(function (Private, $injector) {

src/ui/public/agg_response/tabify/__tests__/_table_group.js

@@ -2,7 +2,7 @@ import expect from 'expect.js';
 import ngMock from 'ng_mock';
 import AggResponseTabifyTableGroupProvider from 'ui/agg_response/tabify/_table_group';
 describe('Table Group class', function () {
-  var TableGroup;
+  let TableGroup;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(ngMock.inject(function (Private, $injector) {

src/ui/public/agg_table/__tests__/_group.js

@@ -8,11 +8,11 @@ import FixturesStubbedLogstashIndexPatternProvider from 'fixtures/stubbed_logsta
 import VisProvider from 'ui/vis';
 describe('AggTableGroup Directive', function () {
 
-  var $rootScope;
-  var $compile;
-  var tabifyAggResponse;
-  var Vis;
-  var indexPattern;
+  let $rootScope;
+  let $compile;
+  let tabifyAggResponse;
+  let Vis;
+  let indexPattern;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(ngMock.inject(function ($injector, Private) {
@@ -24,7 +24,7 @@ describe('AggTableGroup Directive', function () {
     $compile = $injector.get('$compile');
   }));
 
-  var $scope;
+  let $scope;
   beforeEach(function () {
     $scope = $rootScope.$new();
   });

src/ui/public/agg_table/__tests__/_table.js

@@ -9,11 +9,11 @@ import FixturesStubbedLogstashIndexPatternProvider from 'fixtures/stubbed_logsta
 import VisProvider from 'ui/vis';
 describe('AggTable Directive', function () {
 
-  var $rootScope;
-  var $compile;
-  var tabifyAggResponse;
-  var Vis;
-  var indexPattern;
+  let $rootScope;
+  let $compile;
+  let tabifyAggResponse;
+  let Vis;
+  let indexPattern;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(ngMock.inject(function ($injector, Private) {
@@ -25,7 +25,7 @@ describe('AggTable Directive', function () {
     $compile = $injector.get('$compile');
   }));
 
-  var $scope;
+  let $scope;
   beforeEach(function () {
     $scope = $rootScope.$new();
   });
@@ -134,7 +134,7 @@ describe('AggTable Directive', function () {
   });
 
   describe('aggTable.exportAsCsv()', function () {
-    var origBlob;
+    let origBlob;
     function FakeBlob(slices, opts) {
       this.slices = slices;
       this.opts = opts;

src/ui/public/agg_types/__tests__/agg_params.js

@@ -8,11 +8,11 @@ import AggTypesParamTypesOptionedProvider from 'ui/agg_types/param_types/optione
 import AggTypesParamTypesRegexProvider from 'ui/agg_types/param_types/regex';
 describe('AggParams class', function () {
 
-  var AggParams;
-  var BaseAggParam;
-  var FieldAggParam;
-  var OptionedAggParam;
-  var RegexAggParam;
+  let AggParams;
+  let BaseAggParam;
+  let FieldAggParam;
+  let OptionedAggParam;
+  let RegexAggParam;
 
   beforeEach(ngMock.module('kibana'));
   // stub out the param classes before we get the AggParams

src/ui/public/agg_types/__tests__/agg_type.js

@@ -10,12 +10,12 @@ import AggTypesAggTypeProvider from 'ui/agg_types/agg_type';
 import VisAggConfigProvider from 'ui/vis/agg_config';
 import FixturesStubbedLogstashIndexPatternProvider from 'fixtures/stubbed_logstash_index_pattern';
 describe('AggType Class', function () {
-  var AggType;
-  var AggParams;
-  var AggConfig;
-  var indexPattern;
-  var fieldFormat;
-  var Vis;
+  let AggType;
+  let AggParams;
+  let AggConfig;
+  let indexPattern;
+  let fieldFormat;
+  let Vis;
 
 
   beforeEach(ngMock.module('kibana'));

src/ui/public/agg_types/__tests__/bucket_count_between.js

@@ -8,12 +8,12 @@ import AggTypesIndexProvider from 'ui/agg_types/index';
 import VisAggConfigProvider from 'ui/vis/agg_config';
 import AggTypesBucketsBucketCountBetweenProvider from 'ui/agg_types/buckets/_bucket_count_between';
 describe('bucketCountBetween util', function () {
-  var indexPattern;
-  var Vis;
-  var visTypes;
-  var aggTypes;
-  var AggConfig;
-  var bucketCountBetween;
+  let indexPattern;
+  let Vis;
+  let visTypes;
+  let aggTypes;
+  let AggConfig;
+  let bucketCountBetween;
 
   // http://cwestblog.com/2014/02/25/javascript-testing-for-negative-zero/
   // works for -0 and +0

src/ui/public/agg_types/__tests__/buckets/_histogram.js

@@ -6,7 +6,7 @@ import AggParamWriterProvider from '../agg_param_writer';
 describe('Histogram Agg', function () {
 
   describe('ordered', function () {
-    var histogram;
+    let histogram;
 
     beforeEach(ngMock.module('kibana'));
     beforeEach(ngMock.inject(function (Private) {
@@ -24,7 +24,7 @@ describe('Histogram Agg', function () {
 
 
   describe('params', function () {
-    var paramWriter;
+    let paramWriter;
 
     beforeEach(ngMock.module('kibana'));
     beforeEach(ngMock.inject(function (Private) {

src/ui/public/agg_types/__tests__/buckets/_range.js

@@ -11,9 +11,9 @@ describe('Range Agg', function () {
 
   var buckets = values(resp.aggregations[1].buckets);
 
-  var range;
-  var Vis;
-  var indexPattern;
+  let range;
+  let Vis;
+  let indexPattern;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(ngMock.inject(function (Private) {

src/ui/public/agg_types/__tests__/buckets/create_filter/date_histogram.js

@@ -12,16 +12,16 @@ import AggTypesBucketsIntervalOptionsProvider from 'ui/agg_types/buckets/_interv
 describe('AggConfig Filters', function () {
   describe('date_histogram', function () {
 
-    var vis;
-    var agg;
-    var field;
-    var filter;
-    var bucketKey;
-    var bucketStart;
-    var getIntervalStub;
-    var intervalOptions;
+    let vis;
+    let agg;
+    let field;
+    let filter;
+    let bucketKey;
+    let bucketStart;
+    let getIntervalStub;
+    let intervalOptions;
 
-    var init;
+    let init;
 
     beforeEach(ngMock.module('kibana'));
     beforeEach(ngMock.inject(function (Private, $injector) {
@@ -84,7 +84,7 @@ describe('AggConfig Filters', function () {
 
     it('extends the filter edge to 1ms before the next bucket for all interval options', function () {
       intervalOptions.forEach(function (option) {
-        var duration;
+        let duration;
         if (option.val !== 'custom' && moment(1, option.val).isValid()) {
           duration = moment.duration(10, option.val);
 

src/ui/public/agg_types/__tests__/buckets/create_filter/date_range.js

@@ -9,10 +9,10 @@ import AggTypesBucketsCreateFilterDateRangeProvider from 'ui/agg_types/buckets/c
 
 describe('AggConfig Filters', function () {
   describe('Date range', function () {
-    var AggConfig;
-    var indexPattern;
-    var Vis;
-    var createFilter;
+    let AggConfig;
+    let indexPattern;
+    let Vis;
+    let createFilter;
 
     beforeEach(ngMock.module('kibana'));
     beforeEach(ngMock.inject(function (Private) {

src/ui/public/agg_types/__tests__/buckets/create_filter/filters.js

@@ -9,10 +9,10 @@ import AggTypesBucketsCreateFilterFiltersProvider from 'ui/agg_types/buckets/cre
 
 describe('AggConfig Filters', function () {
   describe('filters', function () {
-    var AggConfig;
-    var indexPattern;
-    var Vis;
-    var createFilter;
+    let AggConfig;
+    let indexPattern;
+    let Vis;
+    let createFilter;
 
     beforeEach(ngMock.module('kibana'));
     beforeEach(ngMock.inject(function (Private) {

src/ui/public/agg_types/__tests__/buckets/create_filter/histogram.js

@@ -9,10 +9,10 @@ import AggTypesBucketsCreateFilterHistogramProvider from 'ui/agg_types/buckets/c
 
 describe('AggConfig Filters', function () {
   describe('histogram', function () {
-    var AggConfig;
-    var indexPattern;
-    var Vis;
-    var createFilter;
+    let AggConfig;
+    let indexPattern;
+    let Vis;
+    let createFilter;
 
     beforeEach(ngMock.module('kibana'));
     beforeEach(ngMock.inject(function (Private) {

src/ui/public/agg_types/__tests__/buckets/create_filter/ip_range.js

@@ -7,10 +7,10 @@ import AggTypesBucketsCreateFilterIpRangeProvider from 'ui/agg_types/buckets/cre
 describe('AggConfig Filters', function () {
 
   describe('IP range', function () {
-    var AggConfig;
-    var indexPattern;
-    var Vis;
-    var createFilter;
+    let AggConfig;
+    let indexPattern;
+    let Vis;
+    let createFilter;
 
     beforeEach(ngMock.module('kibana'));
     beforeEach(ngMock.inject(function (Private) {

src/ui/public/agg_types/__tests__/buckets/create_filter/range.js

@@ -7,10 +7,10 @@ import AggTypesBucketsCreateFilterRangeProvider from 'ui/agg_types/buckets/creat
 describe('AggConfig Filters', function () {
 
   describe('range', function () {
-    var AggConfig;
-    var indexPattern;
-    var Vis;
-    var createFilter;
+    let AggConfig;
+    let indexPattern;
+    let Vis;
+    let createFilter;
 
     beforeEach(ngMock.module('kibana'));
     beforeEach(ngMock.inject(function (Private) {

src/ui/public/agg_types/__tests__/buckets/create_filter/terms.js

@@ -7,10 +7,10 @@ import AggTypesBucketsCreateFilterTermsProvider from 'ui/agg_types/buckets/creat
 describe('AggConfig Filters', function () {
 
   describe('terms', function () {
-    var AggConfig;
-    var indexPattern;
-    var Vis;
-    var createFilter;
+    let AggConfig;
+    let indexPattern;
+    let Vis;
+    let createFilter;
 
     beforeEach(ngMock.module('kibana'));
     beforeEach(ngMock.inject(function (Private) {

src/ui/public/agg_types/__tests__/buckets/date_histogram/_editor.js

@@ -7,11 +7,11 @@ import VisProvider from 'ui/vis';
 import AggTypesBucketsIntervalOptionsProvider from 'ui/agg_types/buckets/_interval_options';
 describe('editor', function () {
 
-  var indexPattern;
-  var vis;
-  var agg;
-  var render;
-  var $scope;
+  let indexPattern;
+  let vis;
+  let agg;
+  let render;
+  let $scope;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(ngMock.inject(function (Private, $injector, $compile) {
@@ -69,9 +69,9 @@ describe('editor', function () {
   }));
 
   describe('random field/interval', function () {
-    var params;
-    var field;
-    var interval;
+    let params;
+    let field;
+    let interval;
 
     beforeEach(ngMock.inject(function (Private) {
       field = _.sample(indexPattern.fields);
@@ -97,7 +97,7 @@ describe('editor', function () {
   });
 
   describe('interval "auto" and indexPattern timeField', function () {
-    var params;
+    let params;
 
     beforeEach(function () {
       params = render({ field: indexPattern.timeFieldName, interval: 'auto' });

src/ui/public/agg_types/__tests__/buckets/date_histogram/_params.js

@@ -8,13 +8,13 @@ import AggTypesIndexProvider from 'ui/agg_types/index';
 import VisAggConfigProvider from 'ui/vis/agg_config';
 describe('params', function () {
 
-  var paramWriter;
-  var writeInterval;
+  let paramWriter;
+  let writeInterval;
 
-  var aggTypes;
-  var AggConfig;
-  var setTimeBounds;
-  var timeField;
+  let aggTypes;
+  let AggConfig;
+  let setTimeBounds;
+  let timeField;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(ngMock.inject(function (Private, $injector) {

src/ui/public/agg_types/__tests__/controls/number_list.js

@@ -7,9 +7,9 @@ import 'ui/number_list';
 describe('NumberList directive', function () {
 
 
-  var $el;
-  var $scope;
-  var compile;
+  let $el;
+  let $scope;
+  let compile;
 
   function onlyValidValues() {
     return $el.find('[ng-model]').toArray().map(function (el) {

src/ui/public/agg_types/__tests__/index.js

@@ -12,8 +12,8 @@ import AggTypesMetricsMetricAggTypeProvider from 'ui/agg_types/metrics/metric_ag
 describe('AggTypesComponent', function () {
 
   describe('bucket aggs', function () {
-    var bucketAggs;
-    var BucketAggType;
+    let bucketAggs;
+    let BucketAggType;
 
     beforeEach(ngMock.module('kibana'));
     beforeEach(ngMock.inject(function (Private) {
@@ -29,8 +29,8 @@ describe('AggTypesComponent', function () {
   });
 
   describe('metric aggs', function () {
-    var metricAggs;
-    var MetricAggType;
+    let metricAggs;
+    let MetricAggType;
 
     beforeEach(ngMock.module('kibana'));
     beforeEach(ngMock.inject(function (Private) {

src/ui/public/agg_types/__tests__/param_types/_calculate_interval.js

@@ -7,11 +7,11 @@ import FixturesStubbedLogstashIndexPatternProvider from 'fixtures/stubbed_logsta
 import AggTypesParamTypesCalculateIntervalProvider from 'ui/agg_types/param_types/_calculate_interval';
 
 describe('calculateInterval()', function () {
-  var AggConfig;
-  var indexPattern;
-  var Vis;
-  var createFilter;
-  var calculateInterval;
+  let AggConfig;
+  let indexPattern;
+  let Vis;
+  let createFilter;
+  let calculateInterval;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(ngMock.inject(function (Private) {

src/ui/public/agg_types/__tests__/param_types/_field.js

@@ -5,8 +5,8 @@ import AggTypesParamTypesBaseProvider from 'ui/agg_types/param_types/base';
 import AggTypesParamTypesFieldProvider from 'ui/agg_types/param_types/field';
 describe('Field', function () {
 
-  var BaseAggParam;
-  var FieldAggParam;
+  let BaseAggParam;
+  let FieldAggParam;
 
   beforeEach(ngMock.module('kibana'));
   // fetch out deps

src/ui/public/agg_types/__tests__/param_types/_optioned.js

@@ -5,8 +5,8 @@ import AggTypesParamTypesBaseProvider from 'ui/agg_types/param_types/base';
 import AggTypesParamTypesOptionedProvider from 'ui/agg_types/param_types/optioned';
 describe('Optioned', function () {
 
-  var BaseAggParam;
-  var OptionedAggParam;
+  let BaseAggParam;
+  let OptionedAggParam;
 
   beforeEach(ngMock.module('kibana'));
   // fetch out deps

src/ui/public/agg_types/__tests__/param_types/_raw_json.js

@@ -7,11 +7,11 @@ import AggTypesParamTypesRawJsonProvider from 'ui/agg_types/param_types/raw_json
 
 module.exports = describe('JSON', function () {
   var paramName = 'json_test';
-  var BaseAggParam;
-  var JsonAggParam;
-  var aggParam;
-  var aggConfig;
-  var output;
+  let BaseAggParam;
+  let JsonAggParam;
+  let aggParam;
+  let aggConfig;
+  let output;
 
   function initAggParam(config) {
     config = config || {};

src/ui/public/agg_types/__tests__/param_types/_regex.js

@@ -7,10 +7,10 @@ import VisProvider from 'ui/vis';
 import FixturesStubbedLogstashIndexPatternProvider from 'fixtures/stubbed_logstash_index_pattern';
 describe('Regex', function () {
 
-  var BaseAggParam;
-  var RegexAggParam;
-  var Vis;
-  var indexPattern;
+  let BaseAggParam;
+  let RegexAggParam;
+  let Vis;
+  let indexPattern;
 
   beforeEach(ngMock.module('kibana'));
   // fetch out deps
@@ -34,8 +34,8 @@ describe('Regex', function () {
   });
 
   describe('write results', function () {
-    var aggParam;
-    var aggConfig;
+    let aggParam;
+    let aggConfig;
     var output = { params: {} };
     var paramName = 'exclude';
 

src/ui/public/agg_types/__tests__/param_types/_string.js

@@ -6,11 +6,11 @@ import AggTypesParamTypesStringProvider from 'ui/agg_types/param_types/string';
 
 module.exports = describe('String', function () {
   var paramName = 'json_test';
-  var BaseAggParam;
-  var StringAggParam;
-  var aggParam;
-  var aggConfig;
-  var output;
+  let BaseAggParam;
+  let StringAggParam;
+  let aggParam;
+  let aggConfig;
+  let output;
 
   function initAggParam(config) {
     config = config || {};

src/ui/public/agg_types/buckets/create_filter/ip_range.js

@@ -2,7 +2,7 @@ import CidrMask from 'ui/utils/cidr_mask';
 import buildRangeFilter from 'ui/filter_manager/lib/range';
 export default function createIpRangeFilterProvider() {
   return function (aggConfig, key) {
-    var range;
+    let range;
     if (aggConfig.params.ipRangeType === 'mask') {
       range = new CidrMask(key).getRange();
     } else {

src/ui/public/agg_types/buckets/date_histogram.js

@@ -45,7 +45,7 @@ export default function DateHistogramAggType(timefilter, config, Private) {
     },
     createFilter: createFilter,
     decorateAggConfig: function () {
-      var buckets;
+      let buckets;
       return {
         buckets: {
           configurable: true,

src/ui/public/agg_types/param_types/raw_json.js

@@ -25,7 +25,7 @@ export default function RawJSONAggParamFactory(Private) {
    * @return {undefined}
    */
   RawJSONAggParam.prototype.write = function (aggConfig, output) {
-    var paramJSON;
+    let paramJSON;
     var param = aggConfig.params[this.name];
 
     if (!param) {

src/ui/public/bind/__tests__/bind.js

@@ -3,8 +3,8 @@ import expect from 'expect.js';
 import ngMock from 'ng_mock';
 describe('$scope.$bind', function () {
 
-  var $rootScope;
-  var $scope;
+  let $rootScope;
+  let $scope;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(ngMock.inject(function ($injector) {

src/ui/public/binder/__tests__/binder.js

@@ -6,7 +6,7 @@ import Binder from 'ui/binder';
 import $ from 'jquery';
 
 describe('Binder class', function () {
-  var $scope;
+  let $scope;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(ngMock.inject(function ($rootScope) {

src/ui/public/chrome/directives/app_switcher/__tests__/app_switcher.js

@@ -12,7 +12,7 @@ import 'ui/chrome';
 import '../app_switcher';
 
 describe('appSwitcher directive', function () {
-  var env;
+  let env;
 
   beforeEach(ngMock.module('kibana'));
 

src/ui/public/compile_recursive_directive.js

@@ -26,7 +26,7 @@ uiModules
 
       // Break the recursion loop by removing the contents
       var contents = element.contents().remove();
-      var compiledContents;
+      let compiledContents;
       return {
         pre: (link && link.pre) ? link.pre : null,
         /**

src/ui/public/config/__tests__/config.js

@@ -2,9 +2,9 @@ import expect from 'expect.js';
 import ngMock from 'ng_mock';
 import ConfigDefaultsProvider from 'ui/config/defaults';
 describe('config component', function () {
-  var $scope;
-  var config;
-  var defaults;
+  let $scope;
+  let config;
+  let defaults;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(ngMock.inject(function ($injector, Private) {

src/ui/public/config/_delayed_updater.js

@@ -12,7 +12,7 @@ export default function DelayedUpdaterFactory(Private, $rootScope, Promise) {
     var updater = this;
     var queue = [];
     var log = {};
-    var timer;
+    let timer;
 
     updater.fire = function () {
       clearTimeout(timer);
@@ -21,8 +21,8 @@ export default function DelayedUpdaterFactory(Private, $rootScope, Promise) {
       if (updater.fired) return;
       updater.fired = true;
 
-      var method;
-      var body;
+      let method;
+      let body;
       var updated = [];
       var deleted = [];
 

src/ui/public/config/config.js

@@ -28,7 +28,7 @@ module.service('config', function (Private, kbnVersion, kbnIndex, $rootScope, bu
 
   // active or previous instance of DelayedUpdater. This will log and then process an
   // update once it is requested by calling #set() or #clear().
-  var updater;
+  let updater;
 
   var DocSource = Private(DocSourceProvider);
   var doc = (new DocSource())
@@ -82,7 +82,7 @@ module.service('config', function (Private, kbnVersion, kbnIndex, $rootScope, bu
   });
 
   config.get = function (key, defaultVal) {
-    var keyVal;
+    let keyVal;
 
     if (vals[key] == null) {
       if (defaultVal == null) {

src/ui/public/courier/data_source/__tests__/decorate_query.js

@@ -6,13 +6,13 @@ import DecorateQueryProvider from 'ui/courier/data_source/_decorate_query';
 
 describe('Query decorator', function () {
 
-  var config;
+  let config;
 
-  var indexPattern;
+  let indexPattern;
 
-  var getComputedFields;
+  let getComputedFields;
 
-  var fn;
+  let fn;
   beforeEach(ngMock.module(
     'kibana',
     function ($provide) {

src/ui/public/courier/data_source/__tests__/normalize_sort_request.js

@@ -5,9 +5,9 @@ import NormalizeSortRequestProvider from 'ui/courier/data_source/_normalize_sort
 import FixturesStubbedLogstashIndexPatternProvider from 'fixtures/stubbed_logstash_index_pattern';
 
 describe('SearchSource#normalizeSortRequest', function () {
-  var normalizeSortRequest;
-  var indexPattern;
-  var normalizedSort;
+  let normalizeSortRequest;
+  let indexPattern;
+  let normalizedSort;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(ngMock.inject(function (Private) {

src/ui/public/courier/data_source/_doc_send_to_es.js

@@ -33,7 +33,7 @@ export default function (Promise, Private, es) {
       doc._storeVersion(resp._version);
       doc.id(resp._id);
 
-      var docFetchProm;
+      let docFetchProm;
       if (method !== 'index') {
         docFetchProm = doc.fetch();
       } else {

src/ui/public/courier/data_source/_normalize_sort_request.js

@@ -28,7 +28,7 @@ export default function normalizeSortRequest(config) {
     var indexField = indexPattern.fields.byName[sortField];
 
     if (indexField && indexField.scripted && indexField.sortable) {
-      var direction;
+      let direction;
       if (_.isString(sortValue)) direction = sortValue;
       if (_.isObject(sortValue) && sortValue.order) direction = sortValue.order;
 

src/ui/public/courier/data_source/_root_search_source.js

@@ -12,7 +12,7 @@ export default function RootSearchSource(Private, $rootScope, timefilter, Notifi
     return timefilter.get(globalSource.get('index'));
   });
 
-  var appSource; // set in setAppSource()
+  let appSource; // set in setAppSource()
   resetAppSource();
 
   // when the route changes, clear the appSource

src/ui/public/courier/saved_object/saved_object.js

@@ -151,7 +151,7 @@ export default function SavedObjectFactory(es, kbnIndex, Promise, Private, Notif
       if (!self.searchSource) return;
 
       // if we have a searchSource, set its state based on the searchSourceJSON field
-      var state;
+      let state;
       try {
         state = JSON.parse(searchSourceJson);
       } catch (e) {

src/ui/public/debounce/__tests__/debounce.js

@@ -3,9 +3,9 @@ import sinon from 'auto-release-sinon';
 import expect from 'expect.js';
 import ngMock from 'ng_mock';
 
-var debounce;
-var $timeout;
-var $timeoutSpy;
+let debounce;
+let $timeout;
+let $timeoutSpy;
 
 function init() {
   ngMock.module('kibana');
@@ -19,7 +19,7 @@ function init() {
 }
 
 describe('debounce service', function () {
-  var spy;
+  let spy;
   beforeEach(function () {
     spy = sinon.spy(function () {});
     init();

src/ui/public/debounce/debounce.js

@@ -7,10 +7,10 @@ var module = uiModules.get('kibana');
 
 module.service('debounce', ['$timeout', function ($timeout) {
   return function (func, wait, options) {
-    var timeout;
-    var args;
-    var self;
-    var result;
+    let timeout;
+    let args;
+    let self;
+    let result;
     options = _.defaults(options || {}, {
       leading: false,
       trailing: true

src/ui/public/directives/__tests__/auto_select_if_only_one.js

@@ -5,8 +5,8 @@ import ngMock from 'ng_mock';
 import 'ui/directives/auto_select_if_only_one';
 
 describe('Auto-select if only one directive', function () {
-  var $compile;
-  var $rootScope;
+  let $compile;
+  let $rootScope;
   var zeroOptions = [];
   var oneOption = [{label: 'foo'}];
   var multiOptions = [{label: 'foo'}, {label: 'bar'}];

src/ui/public/directives/__tests__/confirm-click.js

@@ -7,11 +7,11 @@ import 'ui/directives/confirm_click';
 import 'plugins/kibana/discover/index';
 
 
-var $parentScope;
+let $parentScope;
 
-var $scope;
+let $scope;
 
-var $elem;
+let $elem;
 
 var init = function (text) {
   // Load the application
@@ -47,7 +47,7 @@ describe('confirmClick directive', function () {
 
 
   describe('event handlers', function () {
-    var events;
+    let events;
 
     beforeEach(function () {
       init();
@@ -71,7 +71,7 @@ describe('confirmClick directive', function () {
 
 
   describe('confirmed', function () {
-    var confirmed;
+    let confirmed;
 
     beforeEach(function () {
       init();
@@ -98,7 +98,7 @@ describe('confirmClick directive', function () {
   });
 
   describe('not confirmed', function () {
-    var confirmed;
+    let confirmed;
 
     beforeEach(function () {
       init();

src/ui/public/directives/__tests__/css_truncate.js

@@ -4,11 +4,11 @@ import ngMock from 'ng_mock';
 import $ from 'jquery';
 import 'plugins/kibana/discover/index';
 
-var $parentScope;
+let $parentScope;
 
-var $scope;
+let $scope;
 
-var $elem;
+let $elem;
 
 var init = function (expandable) {
   // Load the application

src/ui/public/directives/__tests__/fixed_scroll.js

@@ -8,7 +8,7 @@ import Promise from 'bluebird';
 
 describe('FixedScroll directive', function () {
 
-  var compile;
+  let compile;
   var trash = [];
 
   beforeEach(ngMock.module('kibana'));
@@ -112,10 +112,10 @@ describe('FixedScroll directive', function () {
       { from: '$scroller', to: '$container' }
     ].forEach(function (names) {
       describe('scroll events ' + JSON.stringify(names), function () {
-        var spy;
-        var els;
-        var $from;
-        var $to;
+        let spy;
+        let els;
+        let $from;
+        let $to;
 
         beforeEach(function () {
           spy = sinon.spy($.fn, 'scrollLeft');

src/ui/public/directives/__tests__/inequality.js

@@ -4,9 +4,9 @@ import ngMock from 'ng_mock';
 import 'ui/directives/inequality';
 
 describe('greater_than model validator directive', function () {
-  var $compile;
-  var $rootScope;
-  var html;
+  let $compile;
+  let $rootScope;
+  let html;
 
   beforeEach(ngMock.module('kibana'));
 
@@ -17,7 +17,7 @@ describe('greater_than model validator directive', function () {
 
   // no value is the same as 0
   describe('without value', function () {
-    var element;
+    let element;
     beforeEach(function () {
       html = '<input type="text" ng-model="value" greater-than />';
       element = $compile(html)($rootScope);
@@ -44,7 +44,7 @@ describe('greater_than model validator directive', function () {
 
   [0, 1, 10, 42, -12].forEach(function (num) {
     describe('with value ' + num, function () {
-      var element;
+      let element;
       beforeEach(function () {
         html = '<input type="text" ng-model="value" greater-than="' + num + '" />';
         element = $compile(html)($rootScope);

src/ui/public/directives/__tests__/input_focus.js

@@ -5,13 +5,13 @@ import $ from 'jquery';
 import 'ui/directives/input_focus';
 
 describe('Input focus directive', function () {
-  var $compile;
-  var $rootScope;
-  var $timeout;
-  var element;
-  var $el;
-  var selectedEl;
-  var selectedText;
+  let $compile;
+  let $rootScope;
+  let $timeout;
+  let element;
+  let $el;
+  let selectedEl;
+  let selectedText;
   var inputValue = 'Input Text Value';
 
   beforeEach(ngMock.module('kibana'));

src/ui/public/directives/__tests__/input_whole_number.js

@@ -4,8 +4,8 @@ import ngMock from 'ng_mock';
 import 'ui/directives/input_whole_number';
 
 describe('Whole number input directive', function () {
-  var $compile;
-  var $rootScope;
+  let $compile;
+  let $rootScope;
   var html = '<input type="text" ng-model="value" input-whole-number />';
 
   beforeEach(ngMock.module('kibana'));

src/ui/public/directives/__tests__/json_input.js

@@ -5,10 +5,10 @@ import 'ui/directives/json_input';
 
 
 describe('JSON input validation', function () {
-  var $compile;
-  var $rootScope;
+  let $compile;
+  let $rootScope;
   var html = '<input ng-model="value" json-input require-keys=true />';
-  var element;
+  let element;
 
   beforeEach(ngMock.module('kibana'));
 

src/ui/public/directives/__tests__/parse_query.js

@@ -5,18 +5,18 @@ import ngMock from 'ng_mock';
 
 // Load the kibana app dependencies.
 
-var $rootScope;
-var $timeout;
-var $compile;
-var Promise;
-var Private;
-var config;
-var $elemScope;
-var $elem;
+let $rootScope;
+let $timeout;
+let $compile;
+let Promise;
+let Private;
+let config;
+let $elemScope;
+let $elem;
 
 var cycleIndex = 0;
 var markup = '<input ng-model="mockModel" parse-query input-focus type="text">';
-var fromUser;
+let fromUser;
 import toUser from 'ui/parse_query/lib/to_user';
 import 'ui/parse_query';
 import ParseQueryLibFromUserProvider from 'ui/parse_query/lib/from_user';
@@ -102,7 +102,7 @@ describe('parse-query directive', function () {
 
   describe('model presentation formatter', function () {
     it('should present undefined as empty string', function () {
-      var notDefined;
+      let notDefined;
       expect(toUser(notDefined)).to.be('');
     });
 

src/ui/public/directives/__tests__/timepicker.js

@@ -12,13 +12,13 @@ import 'plugins/kibana/discover/index';
 
 // TODO: This should not be needed, timefilter is only included here, it should move
 
-var $parentScope;
+let $parentScope;
 
-var $scope;
+let $scope;
 
-var $elem;
+let $elem;
 var anchor = '2014-01-01T06:06:06.666Z';
-var clock;
+let clock;
 
 var init = function () {
   // Load the application
@@ -85,7 +85,7 @@ describe('timepicker directive', function () {
   });
 
   describe('refresh interval', function () {
-    var $courier;
+    let $courier;
     beforeEach(function () {
       init();
       ngMock.inject(function (courier, $rootScope) {
@@ -232,7 +232,7 @@ describe('timepicker directive', function () {
     });
 
     it('disables the submit button if the form is invalid', function (done) {
-      var button;
+      let button;
       button = $elem.find('button[disabled]');
       expect(button.length).to.be(0);
 
@@ -359,7 +359,7 @@ describe('timepicker directive', function () {
 
   describe('absolute mode', function () {
 
-    var inputs;
+    let inputs;
 
     beforeEach(function () {
       init();

src/ui/public/directives/__tests__/truncate.js

@@ -5,11 +5,11 @@ import $ from 'jquery';
 import 'plugins/kibana/discover/index';
 
 
-var $parentScope;
+let $parentScope;
 
-var $scope;
+let $scope;
 
-var $elem;
+let $elem;
 
 var init = function (text) {
   // Load the application

src/ui/public/directives/__tests__/typeahead.js

@@ -9,12 +9,12 @@ import 'plugins/kibana/discover/index';
 
 var typeaheadHistoryCount = 10;
 var typeaheadName = 'unittest';
-var $parentScope;
-var $typeaheadScope;
-var $elem;
-var $typeaheadInputScope;
-var typeaheadCtrl;
-var PersistedLog;
+let $parentScope;
+let $typeaheadScope;
+let $elem;
+let $typeaheadInputScope;
+let typeaheadCtrl;
+let PersistedLog;
 
 var markup = '<div class="typeahead" kbn-typeahead="' + typeaheadName + '">' +
   '<input type="text" placeholder="Filter..." class="form-control" ng-model="query" kbn-typeahead-input>' +

src/ui/public/directives/__tests__/validate_cidr_mask.js

@@ -5,8 +5,8 @@ import 'ui/directives/validate_cidr_mask';
 
 
 describe('Validate CIDR mask directive', function () {
-  var $compile;
-  var $rootScope;
+  let $compile;
+  let $rootScope;
   var html = '<input type="text" ng-model="value" validate-cidr-mask />';
 
   beforeEach(ngMock.module('kibana'));

src/ui/public/directives/__tests__/validate_date_math.js

@@ -5,8 +5,8 @@ import 'ui/directives/validate_date_math';
 
 
 describe('Validate date math directive', function () {
-  var $compile;
-  var $rootScope;
+  let $compile;
+  let $rootScope;
   var html = '<input type="text" ng-model="value" validate-date-math />';
 
   beforeEach(ngMock.module('kibana'));

src/ui/public/directives/__tests__/validate_index_name.js

@@ -6,8 +6,8 @@ import 'ui/directives/validate_index_name';
 // Load the kibana app dependencies.
 
 describe('Validate index name directive', function () {
-  var $compile;
-  var $rootScope;
+  let $compile;
+  let $rootScope;
   var html = '<input type="text" ng-model="indexName" validate-index-name />';
 
   beforeEach(ngMock.module('kibana'));

src/ui/public/directives/__tests__/validate_ip.js

@@ -5,8 +5,8 @@ import 'ui/directives/validate_ip';
 
 
 describe('Validate IP directive', function () {
-  var $compile;
-  var $rootScope;
+  let $compile;
+  let $rootScope;
   var html = '<input type="text" ng-model="value" validate-ip />';
 
   beforeEach(ngMock.module('kibana'));

src/ui/public/directives/__tests__/validate_json.js

@@ -5,9 +5,9 @@ import 'ui/directives/validate_json';
 
 // Load the kibana app dependencies.
 
-var $parentScope;
-var $elemScope;
-var $elem;
+let $parentScope;
+let $elemScope;
+let $elem;
 var mockScope = '';
 
 var input = {

src/ui/public/directives/infinite_scroll.js

@@ -10,7 +10,7 @@ module.directive('kbnInfiniteScroll', function () {
     },
     link: function ($scope, $element, attrs) {
       var $window = $(window);
-      var checkTimer;
+      let checkTimer;
 
       function onScroll() {
         if (!$scope.more) return;

src/ui/public/directives/paginate.js

@@ -106,7 +106,7 @@ uiModules.get('kibana')
         var count = perPage ? Math.ceil($scope.list.length / perPage) : 1;
 
         _.times(count, function (i) {
-          var page;
+          let page;
 
           if (perPage) {
             var start = perPage * i;

src/ui/public/directives/pretty_duration.js

@@ -23,7 +23,7 @@ module.directive('prettyDuration', function (config, quickRanges, timeUnits) {
       });
 
       function stringify() {
-        var text;
+        let text;
         // If both parts are date math, try to look up a reasonable string
         if ($scope.from && $scope.to && !moment.isMoment($scope.from) && !moment.isMoment($scope.to)) {
           var tryLookup = lookupByRange[$scope.from.toString() + ' to ' + $scope.to.toString()];

src/ui/public/directives/saved_object_finder.js

@@ -38,7 +38,7 @@ module.directive('savedObjectFinder', function ($location, $injector, kbnUrl, Pr
       var currentFilter = $scope.filter;
 
       // the most recently entered search/filter
-      var prevSearch;
+      let prevSearch;
 
       // the list of hits, used to render display
       self.hits = [];

src/ui/public/doc_table/__tests__/doc_table.js

@@ -12,16 +12,16 @@ import FixturesStubbedSearchSourceProvider from 'fixtures/stubbed_search_source'
 // Load the kibana app dependencies.
 
 
-var $parentScope;
+let $parentScope;
 
 
-var $scope;
+let $scope;
 
 
-var $timeout;
+let $timeout;
 
 
-var searchSource;
+let searchSource;
 
 var init = function ($elem, props) {
   ngMock.inject(function ($rootScope, $compile, _$timeout_) {
@@ -47,7 +47,7 @@ var destroy = function () {
 };
 
 describe('docTable', function () {
-  var $elem;
+  let $elem;
 
   beforeEach(ngMock.module('kibana'));
   beforeEach(function () {

src/ui/public/doc_table/__tests__/lib/get_sort.js

@@ -3,7 +3,7 @@ var defaultSort = {time: 'desc'};
 import expect from 'expect.js';
 import ngMock from 'ng_mock';
 import FixturesStubbedLogstashIndexPatternProvider from 'fixtures/stubbed_logstash_index_pattern';
-var indexPattern;
+let indexPattern;
 
 describe('docTable', function () {
   beforeEach(ngMock.module('kibana'));

src/ui/public/doc_table/__tests__/lib/rows_headers.js

@@ -10,14 +10,14 @@ import FixturesStubbedLogstashIndexPatternProvider from 'fixtures/stubbed_logsta
 
 describe('Doc Table', function () {
 
-  var $parentScope;
+  let $parentScope;
 
-  var $scope;
+  let $scope;
 
-  var config;
+  let config;
 
   // Stub out a minimal mapping of 4 fields
-  var mapping;
+  let mapping;
 
   beforeEach(ngMock.module('kibana', 'apps/discover'));
   beforeEach(ngMock.inject(function (_config_, $rootScope, Private) {
@@ -53,7 +53,7 @@ describe('Doc Table', function () {
     });
 
     it('should be able to add and remove columns', function (done) {
-      var childElems;
+      let childElems;
       // Should include a column for toggling and the time column by default
       $parentScope.columns = ['bytes'];
       parentElem.scope().$digest();
@@ -245,7 +245,7 @@ describe('Doc Table', function () {
       });
 
       describe('expanded', function () {
-        var $details;
+        let $details;
         beforeEach(function () {
           // Open the row
           $scope.toggleRow();
@@ -278,7 +278,7 @@ describe('Doc Table', function () {
         'index-pattern="indexPattern"' +
         '></tr>'
     );
-    var $details;
+    let $details;
 
     beforeEach(function () {
       var row = getFakeRow(0, mapping);
@@ -312,10 +312,10 @@ describe('Doc Table', function () {
   });
 
   describe('row diffing', function () {
-    var $row;
-    var $scope;
-    var $root;
-    var $before;
+    let $row;
+    let $scope;
+    let $root;
+    let $before;
 
     beforeEach(ngMock.inject(function ($rootScope, $compile, Private) {
       $root = $rootScope;

src/ui/public/doc_table/components/table_row.js

@@ -46,10 +46,10 @@ module.directive('kbnTableRow', function ($compile) {
       };
 
       // when we compile the details, we use this $scope
-      var $detailsScope;
+      let $detailsScope;
 
       // when we compile the toggle button in the summary, we use this $scope
-      var $toggleScope;
+      let $toggleScope;
 
       // toggle display of the rows details, a full list of the fields from each row
       $scope.toggleRow = function () {

src/ui/public/doc_table/lib/get_sort.js

@@ -8,8 +8,8 @@ import _ from 'lodash';
  */
 function getSort(sort, indexPattern) {
   var sortObj = {};
-  var field;
-  var direction;
+  let field;
+  let direction;
 
   function isSortable(field) {
     return (indexPattern.fields.byName[field] && indexPattern.fields.byName[field].sortable);

src/ui/public/doc_title/__tests__/doc_title.js

@@ -5,11 +5,11 @@ import ngMock from 'ng_mock';
 import DocTitleProvider from 'ui/doc_title';
 
 describe('docTitle Service', function () {
-  var initialDocTitle;
+  let initialDocTitle;
   var MAIN_TITLE = 'Kibana 4';
 
-  var docTitle;
-  var $rootScope;
+  let docTitle;
+  let $rootScope;
 
   beforeEach(function () {
     initialDocTitle = document.title;
@@ -61,7 +61,7 @@ describe('docTitle Service', function () {
   });
 
   describe('#change', function () {
-    var getActiveTabStub;
+    let getActiveTabStub;
 
     beforeEach(function () {
       getActiveTabStub = sinon.stub(require('ui/chrome'), 'getActiveTab');

src/ui/public/doc_title/doc_title.js

@@ -14,7 +14,7 @@ uiModules.get('kibana')
   var baseTitle = document.title;
   var self = this;
 
-  var lastChange;
+  let lastChange;
 
   function render() {
     lastChange = lastChange || [];

src/ui/public/es.js

@@ -2,7 +2,7 @@ import 'elasticsearch-browser';
 import _ from 'lodash';
 import uiModules from 'ui/modules';
 
-var es; // share the client amoungst all apps
+let es; // share the client amoungst all apps
 uiModules
   .get('kibana', ['elasticsearch', 'kibana/config'])
   .service('es', function (esFactory, esUrl, $q, esApiVersion, esRequestTimeout) {