ESM and WASM decompression

Makefile

@@ -1,19 +1,20 @@
 CPP = emcc
-CPPFLAGS = -O3 -s TOTAL_MEMORY=318767104 -s NO_FILESYSTEM=1 --closure 1
+CPPFLAGS = -O3 -s TOTAL_MEMORY=318767104 -s NO_FILESYSTEM=1 -s MODULARIZE=1 -s EXPORT_ES6=1 -s 'EXPORT_NAME="brotli"' -s "EXPORTED_RUNTIME_METHODS=['getValue']" --closure 1
 
 COMMONDIR = vendor/brotli/c/common
 ENCDIR = vendor/brotli/c/enc
-ENCSRC = compress.c $(wildcard $(COMMONDIR)/*.c) $(wildcard $(ENCDIR)/*.c)
+DECDIR = vendor/brotli/c/dec
+ENCSRC = compress.c decompress.c $(wildcard $(COMMONDIR)/*.c) $(wildcard $(ENCDIR)/*.c) $(wildcard $(DECDIR)/*.c)
 ENCOBJ = $(ENCSRC:.c=.o)
 
-all: build/encode.js
+all: build/brotli.js
 
 .c.o .cc.o:
 	$(CPP) -I vendor/brotli/c/include/ -c $< -o $@
 
-build/encode.js: $(ENCOBJ)
+build/brotli.js: $(ENCOBJ)
 	mkdir -p build/
-	$(CPP) $(CPPFLAGS) -s EXPORTED_FUNCTIONS="['_malloc', '_free', '_encodeWithDictionary']" $(ENCOBJ) -o build/encode.js
+	$(CPP) $(CPPFLAGS) -s EXPORTED_FUNCTIONS="['_malloc', '_free', '_encodeWithDictionary', '_decompress']" $(ENCOBJ) -o build/brotli.js
 
 clean:
 	rm -rf $(ENCOBJ) build/

compress.js

@@ -1,12 +1,13 @@
-var brotli = require('./build/encode');
+import brotliPromise from './build/brotli.js';
 
 /**
  * Compresses the given buffer
  * The second parameter is optional and specifies whether the buffer is
  * text or binary data (the default is binary).
  * Returns null on error
  */
-module.exports = function(buffer, opts) {
+export const compress = async function(buffer, opts) {
+  const brotli = await brotliPromise();
   // default to binary data
   var quality = 11;
   var mode = 0;