1 files changed, 12 insertions, 0 deletions
diff --git a/platform/javascript/emscripten_helpers.py b/platform/javascript/emscripten_helpers.py
index cc874c432e..278186e4c0 100644
--- a/platform/javascript/emscripten_helpers.py
+++ b/platform/javascript/emscripten_helpers.py
@@ -25,3 +25,15 @@ def add_js_libraries(env, libraries):
     if "JS_LIBS" not in env:
         env["JS_LIBS"] = []
     env.Append(JS_LIBS=env.File(libraries))
+
+
+def add_js_pre(env, js_pre):
+    if "JS_PRE" not in env:
+        env["JS_PRE"] = []
+    env.Append(JS_PRE=env.File(js_pre))
+
+
+def add_js_externs(env, externs):
+    if "JS_EXTERNS" not in env:
+        env["JS_EXTERNS"] = []
+    env.Append(JS_EXTERNS=env.File(externs))