Try again with proper build

build.ps1

@@ -2,4 +2,4 @@ if (Test-Path $dist/index.js) {
     Remove-Item dist/index.js
 }
 
-em++ -O3 -std=c++20 (ls wasm/*.c) -s WASM=1 -s "ALLOW_MEMORY_GROWTH=1" -s "SINGLE_FILE=1" -o dist/temp.js
+em++ -O3 -std=c++20 (ls wasm/*.c) -s WASM=1 -s "ALLOW_MEMORY_GROWTH=1" -s "SINGLE_FILE=1" -s "MODULARIZE=1" -s "EXPORT_ES6=1" -o dist/temp.js

build.sh

@@ -6,4 +6,4 @@ DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
 cd $DIR && rm -f lib/*
 
-cd $DIR && em++ -O3 -std=gnu++20 wasm/*.c --post-js src/potrace.js -s WASM=1 -s EXPORTED_FUNCTIONS='["_start"]' -s "ALLOW_MEMORY_GROWTH=1" -s "SINGLE_FILE=1" -o dist/temp.js
+cd $DIR && em++ -O3 -std=gnu++20 wasm/*.c --post-js src/potrace.js -s WASM=1 -s EXPORTED_FUNCTIONS='["_start"]' -s "ALLOW_MEMORY_GROWTH=1" -s "SINGLE_FILE=1" -s "MODULARIZE=1" -s "EXPORT_ES6=1" -o dist/temp.js

demo/script.js

@@ -1,6 +1,11 @@
-import { potrace, init } from '../dist/index.js';
+import potraceModule from '../dist/index.js';
 
 (async () => {
+  const Module = await potraceModule();
+  // @connorjclark Unsure about the next two lines.
+  await Module.ready;
+  const potrace = Module._start;
+
   const pre1 = document.querySelector('#pre1');
   const pre2 = document.querySelector('#pre2');
   const pre3 = document.querySelector('#pre3');
@@ -13,8 +18,6 @@ import { potrace, init } from '../dist/index.js';
   const blob1 = await fetch('./logo.png').then((response) => response.blob());
   const blob2 = await fetch('./avatar.jpg').then((response) => response.blob());
 
-  await init();
-
   potrace(blob1, {
     turdsize: 2,
     turnpolicy: 4,
@@ -25,8 +28,8 @@ import { potrace, init } from '../dist/index.js';
     extractcolors: true,
     posterizelevel: 2,
     posterizationalgorithm: 0, // 0: simple, 1: interpolation
-  }).then((svg) => {
-    div1.innerHTML = svg;
+  }) .then((svg) => {
+    =div1.innerHTML = svg;
     svg = svg.replaceAll('><', '>\n<');
     pre1.textContent = svg + '\n\n(' + svg.length + ')';
   });