Update README.md

Author: lolleko

README.md

@@ -3,6 +3,49 @@
 WASM bindings and binaries for Lua 5.1 to 5.4.
 
 Make sure to run `./scripts/setup.ts` (requires emscripten sdk) first before using `npm run build`.
-### Important: This currently only includes bindings used to test TypescriptToLua
+### Important: This currently only includes the bindings used to test TypescriptToLua
 
-In the future Bindings for the complte API may be added.
+In the future Bindings for the complete API may be added.
+
+### Example
+
+```ts
+import { LUA_OK } from "lua-wasm-bindings/dist/lua";
+
+import { lauxlib, lua, lualib } from "lua-wasm-bindings/dist/lua.54";
+
+
+const luaCode = `return "Hello"`;
+consol.log(executeLua(luaCode));
+
+function executeLua (luaCode: string): string {
+    const L = lauxlib.luaL_newstate();
+    lualib.luaL_openlibs(L);
+
+    // Optional Load modules
+    // lua.lua_getglobal(L, "package");
+    // lua.lua_getfield(L, -1, "preload");
+    // lauxlib.luaL_loadstring(L, jsonLib); // Load extenal package from string
+    // lua.lua_setfield(L, -2, "json");
+
+    const status = lauxlib.luaL_dostring(L, luaCode);
+
+    if (status === LUA_OK) {
+        if (lua.lua_isstring(L, -1)) {
+            const result = lua.lua_tostring(L, -1);
+            lua.lua_close(L);
+            return result === null ? undefined : result;
+        } else {
+            const returnType = lua.lua_typename(L, lua.lua_type(L, -1));
+            lua.lua_close(L);
+            throw new Error(`Unsupported Lua return type: ${returnType}`);
+        }
+    } else {
+        const luaStackString = lua.lua_tostring(L, -1);
+        const message = luaStackString.replace(/^\[string "(--)?\.\.\."\]:\d+: /, "");
+        lua.lua_close(L);
+        return new Error(message);
+    }
+}
+```
+