4 files changed, 35 insertions, 1 deletions
diff --git a/test/js/dune b/test/js/dune
index d919a1e..83a2e60 100644
--- a/test/js/dune
+++ b/test/js/dune
@@ -2,4 +2,11 @@
  (name websockets_hello)
  (libraries portal_ws lwt js_of_ocaml)
  (modes js)
- (preprocess (pps js_of_ocaml-ppx)))
+ (preprocess (pps js_of_ocaml-ppx))
+ (js_of_ocaml
+  (javascript_files polyfill.js)))
+
+(rule
+ (alias npm)
+ (deps package.json package-lock.json)
+ (action (system "npm ci")))
diff --git a/test/js/package-lock.json b/test/js/package-lock.json
new file mode 100644
index 0000000..8b5d148
--- /dev/null
+++ b/test/js/package-lock.json
@@ -0,0 +1,21 @@
+{
+  "name": "js",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "dependencies": {
+        "xmlhttprequest": "^1.8.0"
+      }
+    },
+    "node_modules/xmlhttprequest": {
+      "version": "1.8.0",
+      "resolved": "https://registry.npmjs.org/xmlhttprequest/-/xmlhttprequest-1.8.0.tgz",
+      "integrity": "sha512-58Im/U0mlVBLM38NdZjHyhuMtCqa61469k2YP/AaPbvCoV9aQGUpbJBj1QRm2ytRiVQBD/fsw7L2bJGDVQswBA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.4.0"
+      }
+    }
+  }
+}
diff --git a/test/js/package.json b/test/js/package.json
new file mode 100644
index 0000000..3b36bf4
--- /dev/null
+++ b/test/js/package.json
@@ -0,0 +1,5 @@
+{
+  "dependencies": {
+    "xmlhttprequest": "^1.8.0"
+  }
+}
diff --git a/test/js/polyfill.js b/test/js/polyfill.js
new file mode 100644
index 0000000..e394ec8
--- /dev/null
+++ b/test/js/polyfill.js
@@ -0,0 +1 @@
+global.XMLHttpRequest = require("xmlhttprequest").XMLHttpRequest;