diff --git a/ts/.gitignore b/ts/.gitignore
index bae8f1051..3c3629e64 100644
--- a/ts/.gitignore
+++ b/ts/.gitignore
@@ -1,4 +1 @@
 node_modules
-
-
-
diff --git a/ts/BUILD.bazel b/ts/BUILD.bazel
index 91f8ac7c5..5340860a5 100644
--- a/ts/BUILD.bazel
+++ b/ts/BUILD.bazel
@@ -13,3 +13,19 @@ exports_files([
     ".eslintrc.js",
     "licenses.json",
 ])
+
+filegroup(
+    name = "mathjax",
+    srcs = glob(
+        include = glob([
+            'node_modules/mathjax/es5/tex-chtml.js',
+            'node_modules/mathjax/es5/input/tex/extensions/**/*',
+            'node_modules/mathjax/es5/output/chtml/fonts/woff-v2/**/*',
+            'node_modules/mathjax/es5/a11y/**/*',
+            'node_modules/mathjax/es5/sre/**/*',
+        ]),
+        exclude = [
+            'node_modules/mathjax/es5/sre/mathmaps/mathmaps_ie.js',
+        ],
+    ),
+)