IFCLoader: Use async/await to make sure the wasm is loaded at parse time.

Author: mrdoob

examples/jsm/loaders/IFCLoader.js

@@ -17,7 +17,6 @@ import {
 } from '../../../../build/three.module.js';
 
 var ifcAPI = new IfcAPI();
-ifcAPI.Init();
 
 function IFCLoader( manager ) {
 
@@ -40,11 +39,11 @@ IFCLoader.prototype = Object.assign( Object.create( Loader.prototype ), {
 		loader.setWithCredentials( scope.withCredentials );
 		loader.load(
 			url,
-			function ( buffer ) {
+			async function ( buffer ) {
 
 				try {
 
-					onLoad( scope.parse( buffer ) );
+					onLoad( await scope.parse( buffer ) );
 
 				} catch ( e ) {
 
@@ -69,9 +68,13 @@ IFCLoader.prototype = Object.assign( Object.create( Loader.prototype ), {
 
 	},
 
-	parse: ( function () {
+	parse: async function ( buffer ) {
 
-		return function ( buffer ) {
+		if ( ifcAPI.wasmModule === undefined ) {
+
+			await ifcAPI.Init();
+
+		}
 
 		var data = new Uint8Array( buffer );
 		var modelID = ifcAPI.OpenModel( 'example.ifc', data );
@@ -168,9 +171,7 @@ IFCLoader.prototype = Object.assign( Object.create( Loader.prototype ), {
 
 		}
 
-		};
-
-	} )(),
+	}
 } );
 
 export { IFCLoader };