--- a/backbone.shard.js	Sat Jul 01 07:32:07 2017 +0800
+++ b/backbone.shard.js	Sat Jul 01 07:33:53 2017 +0800
@@ -16,7 +16,7 @@
 
     this._collection
         .on('all', function(event, model) {
-            if (event == 'change') {
+            if (event === 'change') {
                 if (this._filter(model) && _(this.models).contains(model)) {
                     this.trigger.apply(this, arguments);
                 }

--- a/test/underscore-methods.js	Sat Jul 01 07:32:07 2017 +0800
+++ b/test/underscore-methods.js	Sat Jul 01 07:33:53 2017 +0800
@@ -9,7 +9,7 @@
         col = new Backbone.Collection([a, b, c, d]);
         shard = new Backbone.Shard({
             collection: col,
-            filter: function(model) { return model.get('data') != 'd'; }
+            filter: function(model) { return model.get('data') !== 'd'; }
         });
     }
 });
@@ -37,10 +37,10 @@
     deepEqual(shard.indexBy('data'), {a: a, b: b, c: c}, 'indexBy() works');
 
     var sh = shard.shuffle().reduce(function(memo, model) { return memo += model.get('data'); }, '');
-    ok(sh.length == 3 && _(sh).contains('a') && _(sh).contains('b') && _(sh).contains('c'), 'shuffle() works');
+    ok(sh.length === 3 && _(sh).contains('a') && _(sh).contains('b') && _(sh).contains('c'), 'shuffle() works');
 
     var s = shard.sample(999).reduce(function(memo, model) { return memo += model.get('data'); }, '');
-    ok(s.length == 3 && _(s).contains('a') && _(s).contains('b') && _(s).contains('c'), 'sample() works');
+    ok(s.length === 3 && _(s).contains('a') && _(s).contains('b') && _(s).contains('c'), 'sample() works');
 });
 
 test('Underscore methods: searching and filtering', function() {
@@ -63,15 +63,15 @@
     }), c, 'max() works');
 
     strictEqual(shard.find(function(model) {
-        return model.get('data') == 'b';
+        return model.get('data') === 'b';
     }), b, 'find() works');
 
     deepEqual(shard.filter(function(model) {
-        return model.get('data') != 'b';
+        return model.get('data') !== 'b';
     }), [a, c], 'filter() works');
 
     deepEqual(shard.reject(function(model) {
-        return model.get('data') == 'b';
+        return model.get('data') === 'b';
     }), [a, c], 'reject() works');
 
     equal(shard.contains(b), true, 'contains() works');
@@ -119,7 +119,7 @@
     equal(shard.includes(b), true, 'includes() works');
 
     deepEqual(shard.select(function(model) {
-        return model.get('data') != 'b';
+        return model.get('data') !== 'b';
     }), [a, c], 'select() works');
 
     equal(shard.foldl(function(memo, model) {