fix rustwasm#3307: do nothing when calling init multiple times

erwanvivien · Feb 17, 2023 · 1436eb4 · 1436eb4
1 parent 1aee7e8
commit 1436eb4
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/crates/cli-support/src/js/mod.rs b/crates/cli-support/src/js/mod.rs
@@ -385,7 +385,7 @@ impl<'a> Context<'a> {
                         script_src = new URL(document.currentScript.src, location.href).toString();
                     }\n",
                 );
-                js.push_str("let wasm;\n");
+                js.push_str("let wasm = undefined;\n");
                 init = self.gen_init(needs_manual_start, None)?;
                 footer.push_str(&format!(
                     "{} = Object.assign(init, {{ initSync }}, __exports);\n",
@@ -866,6 +866,8 @@ impl<'a> Context<'a> {
                 }}
 
                 async function init(input{init_memory_arg}) {{
+                    if (wasm !== undefined) return wasm;
+
                     {default_module_path}
                     const imports = getImports();