wasm-rust-calling-from-js can not run

[futurechallenger]

Error is:

TypeError: Module.cwrap is not a function
    at Object.main [as onRuntimeInitialized] (?4001:14)
    at doRun (site.js:1)
    at run (site.js:1)
    at runCaller (site.js:1)
    at removeRunDependency (site.js:1)
    at receiveInstance (site.js:1)
    at receiveInstantiatedSource (site.js:1)

emcc:

emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 1.38.8
clang version 6.0.1 (https://github.com/kripken/emscripten-fastcomp-clang.git 7c43b8c67d35a870986fb92b5a04e615477ab9cf) (https://github.com/kripken/emscripten-fastcomp.git 35cedc8aba1fd36edefee3659f82e5feceb0568c) (emscripten 1.38.8 : 1.38.8)
Target: x86_64-apple-darwin18.0.0
Thread model: posix
InstalledDir: /Users/challenger/emsdk-portable/clang/fastcomp/build_incoming_64/bin
INFO:root:(Emscripten: Running sanity checks)

[futurechallenger]

I changed make file:

SHELL := /bin/bash

all:
	cargo build --target=wasm32-unknown-emscripten --release
	mkdir -p site
	find target/wasm32-unknown-emscripten/release/deps -type f -name "*.wasm" | xargs -I {} cp {} site/site.wasm
	find target/wasm32-unknown-emscripten/release/deps -type f ! -name "*.asm.js" -name "*.js" | xargs -I {} cp {} site/site.js
	python -m SimpleHTTPServer

It's not important!