diff --git a/tests/offline/external-call/test.js b/tests/offline/external-call/test.js
new file mode 100644
index 00000000..ac3e4c6b
--- /dev/null
+++ b/tests/offline/external-call/test.js
@@ -0,0 +1,8 @@
+import { delay } from '../../../dist/tests/test-utils.cjs'
+
+export default async function test(analyser) {
+ const url = 'http://localhost:8000'
+ await analyser.start(url, { headless: true })
+ await delay(100)
+ return await analyser.stop()
+}
\ No newline at end of file
diff --git a/tests/offline/external-call/website/index.html b/tests/offline/external-call/website/index.html
new file mode 100644
index 00000000..551c1499
--- /dev/null
+++ b/tests/offline/external-call/website/index.html
@@ -0,0 +1,12 @@
+
+
+
+
+ Worker test
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/tests/offline/external-call/website/index.js b/tests/offline/external-call/website/index.js
new file mode 100644
index 00000000..ba3fcecf
--- /dev/null
+++ b/tests/offline/external-call/website/index.js
@@ -0,0 +1,11 @@
+import init, { greet } from './pkg/demo.js';
+
+async function run() {
+ await init();
+
+ console.log(greet("Hello"));
+ console.log(greet("World"));
+}
+
+
+run();
diff --git a/tests/offline/external-call/website/pkg/demo.js b/tests/offline/external-call/website/pkg/demo.js
new file mode 100644
index 00000000..50005544
--- /dev/null
+++ b/tests/offline/external-call/website/pkg/demo.js
@@ -0,0 +1,198 @@
+let wasm;
+
+const cachedTextDecoder = (typeof TextDecoder !== 'undefined' ? new TextDecoder('utf-8', { ignoreBOM: true, fatal: true }) : { decode: () => { throw Error('TextDecoder not available') } } );
+
+if (typeof TextDecoder !== 'undefined') { cachedTextDecoder.decode(); };
+
+let cachedUint8Memory0 = null;
+
+function getUint8Memory0() {
+ if (cachedUint8Memory0 === null || cachedUint8Memory0.byteLength === 0) {
+ cachedUint8Memory0 = new Uint8Array(wasm.memory.buffer);
+ }
+ return cachedUint8Memory0;
+}
+
+function getStringFromWasm0(ptr, len) {
+ ptr = ptr >>> 0;
+ return cachedTextDecoder.decode(getUint8Memory0().subarray(ptr, ptr + len));
+}
+
+let WASM_VECTOR_LEN = 0;
+
+const cachedTextEncoder = (typeof TextEncoder !== 'undefined' ? new TextEncoder('utf-8') : { encode: () => { throw Error('TextEncoder not available') } } );
+
+const encodeString = (typeof cachedTextEncoder.encodeInto === 'function'
+ ? function (arg, view) {
+ return cachedTextEncoder.encodeInto(arg, view);
+}
+ : function (arg, view) {
+ const buf = cachedTextEncoder.encode(arg);
+ view.set(buf);
+ return {
+ read: arg.length,
+ written: buf.length
+ };
+});
+
+function passStringToWasm0(arg, malloc, realloc) {
+
+ if (realloc === undefined) {
+ const buf = cachedTextEncoder.encode(arg);
+ const ptr = malloc(buf.length, 1) >>> 0;
+ getUint8Memory0().subarray(ptr, ptr + buf.length).set(buf);
+ WASM_VECTOR_LEN = buf.length;
+ return ptr;
+ }
+
+ let len = arg.length;
+ let ptr = malloc(len, 1) >>> 0;
+
+ const mem = getUint8Memory0();
+
+ let offset = 0;
+
+ for (; offset < len; offset++) {
+ const code = arg.charCodeAt(offset);
+ if (code > 0x7F) break;
+ mem[ptr + offset] = code;
+ }
+
+ if (offset !== len) {
+ if (offset !== 0) {
+ arg = arg.slice(offset);
+ }
+ ptr = realloc(ptr, len, len = offset + arg.length * 3, 1) >>> 0;
+ const view = getUint8Memory0().subarray(ptr + offset, ptr + len);
+ const ret = encodeString(arg, view);
+
+ offset += ret.written;
+ }
+
+ WASM_VECTOR_LEN = offset;
+ return ptr;
+}
+
+let cachedInt32Memory0 = null;
+
+function getInt32Memory0() {
+ if (cachedInt32Memory0 === null || cachedInt32Memory0.byteLength === 0) {
+ cachedInt32Memory0 = new Int32Array(wasm.memory.buffer);
+ }
+ return cachedInt32Memory0;
+}
+/**
+* @param {string} a
+* @returns {string}
+*/
+export function greet(a) {
+ let deferred2_0;
+ let deferred2_1;
+ try {
+ const retptr = wasm.__wbindgen_add_to_stack_pointer(-16);
+ const ptr0 = passStringToWasm0(a, wasm.__wbindgen_malloc, wasm.__wbindgen_realloc);
+ const len0 = WASM_VECTOR_LEN;
+ wasm.greet(retptr, ptr0, len0);
+ var r0 = getInt32Memory0()[retptr / 4 + 0];
+ var r1 = getInt32Memory0()[retptr / 4 + 1];
+ deferred2_0 = r0;
+ deferred2_1 = r1;
+ return getStringFromWasm0(r0, r1);
+ } finally {
+ wasm.__wbindgen_add_to_stack_pointer(16);
+ wasm.__wbindgen_free(deferred2_0, deferred2_1, 1);
+ }
+}
+
+async function __wbg_load(module, imports) {
+ if (typeof Response === 'function' && module instanceof Response) {
+ if (typeof WebAssembly.instantiateStreaming === 'function') {
+ try {
+ return await WebAssembly.instantiateStreaming(module, imports);
+
+ } catch (e) {
+ if (module.headers.get('Content-Type') != 'application/wasm') {
+ console.warn("`WebAssembly.instantiateStreaming` failed because your server does not serve wasm with `application/wasm` MIME type. Falling back to `WebAssembly.instantiate` which is slower. Original error:\n", e);
+
+ } else {
+ throw e;
+ }
+ }
+ }
+
+ const bytes = await module.arrayBuffer();
+ return await WebAssembly.instantiate(bytes, imports);
+
+ } else {
+ const instance = await WebAssembly.instantiate(module, imports);
+
+ if (instance instanceof WebAssembly.Instance) {
+ return { instance, module };
+
+ } else {
+ return instance;
+ }
+ }
+}
+
+function __wbg_get_imports() {
+ const imports = {};
+ imports.wbg = {};
+ imports.wbg.__wbg_log_24dc0bd9d833d95d = function(arg0, arg1) {
+ console.log(getStringFromWasm0(arg0, arg1));
+ };
+
+ return imports;
+}
+
+function __wbg_init_memory(imports, maybe_memory) {
+
+}
+
+function __wbg_finalize_init(instance, module) {
+ wasm = instance.exports;
+ __wbg_init.__wbindgen_wasm_module = module;
+ cachedInt32Memory0 = null;
+ cachedUint8Memory0 = null;
+
+
+ return wasm;
+}
+
+function initSync(module) {
+ if (wasm !== undefined) return wasm;
+
+ const imports = __wbg_get_imports();
+
+ __wbg_init_memory(imports);
+
+ if (!(module instanceof WebAssembly.Module)) {
+ module = new WebAssembly.Module(module);
+ }
+
+ const instance = new WebAssembly.Instance(module, imports);
+
+ return __wbg_finalize_init(instance, module);
+}
+
+async function __wbg_init(input) {
+ if (wasm !== undefined) return wasm;
+
+ if (typeof input === 'undefined') {
+ input = new URL('demo_bg.wasm', import.meta.url);
+ }
+ const imports = __wbg_get_imports();
+
+ if (typeof input === 'string' || (typeof Request === 'function' && input instanceof Request) || (typeof URL === 'function' && input instanceof URL)) {
+ input = fetch(input);
+ }
+
+ __wbg_init_memory(imports);
+
+ const { instance, module } = await __wbg_load(await input, imports);
+
+ return __wbg_finalize_init(instance, module);
+}
+
+export { initSync }
+export default __wbg_init;
diff --git a/tests/offline/external-call/website/pkg/demo_bg.wasm b/tests/offline/external-call/website/pkg/demo_bg.wasm
new file mode 100644
index 00000000..48b95dea
Binary files /dev/null and b/tests/offline/external-call/website/pkg/demo_bg.wasm differ