diff --git a/docs/Emscripten.md b/docs/Emscripten.md
new file mode 100644
index 0000000..243e007
--- /dev/null
+++ b/docs/Emscripten.md
@@ -0,0 +1,15 @@
+# Emscripten
+This file is a bit of notes on the Emscripten changes to the C code.
+
+# Makefile
+I added a `Makefile` to the project.  A few key things here.
+* warnings flags etc to in `CLANG_WARN_FLAGS`
+* compile time `#define` go in `CLANG_OTHER_FLAGS`
+* Every .c .cpp file goes in `CPP_FILES`
+* Every .h .hpp file goes in `HPP_FILES` however not required
+  * This is only required if you want make "sensativity" to work correctly
+* The emscripten `.js` file is minified by default. to disable this run
+  * `NOOPT=1 make wasm`
+  * Doing this will also compile the c code with `O0`
+* Any c functions you want to access from javascript must be added to `EXPORT_STRING`
+  * When you add them, you must add a `_` prefix