- support ESM

rollup.config.mjs

@@ -0,0 +1,47 @@
+import commonjs from '@rollup/plugin-commonjs';
+import terser from '@rollup/plugin-terser';
+
+const disableNodeJs = {
+  name: 'disable-node-js',
+  transform(code, id) {
+    if (id.endsWith('/src/sha256.js')) {
+      return code.replace(
+        "var NODE_JS = !root.JS_SHA256_NO_NODE_JS && typeof process === 'object' && process.versions && process.versions.node && process.type != 'renderer';",
+        'var NODE_JS = false;'
+      );
+    }
+  }
+};
+
+export default [
+  {
+    input: 'src/sha256.mjs',
+    external: ['crypto', 'buffer'],
+    output: {
+      file: 'build/sha256.node.mjs',
+      format: 'es'
+    },
+    plugins: [commonjs({
+      strictRequires: false
+    })]
+  },
+  {
+    input: 'src/sha256.mjs',
+    output: {
+      file: 'build/sha256.mjs',
+      format: 'es'
+    },
+    plugins: [disableNodeJs, commonjs({
+      strictRequires: false,
+      ignore: ['crypto', 'buffer']
+    })]
+  },
+  {
+    input: 'build/sha256.mjs',
+    output: {
+      file: 'build/sha256.min.mjs',
+      format: 'es'
+    },
+    plugins: [terser()]
+  }
+];