remove global usage for wasm

web/modules/wfa.js

@@ -560,7 +560,7 @@ export default function init (path) {
 			const wasm = obj.instance;
 			global.wfa = wasm
 			go.run(wasm);
-			res()
+			res(wasm)
 		}
 		if ('instantiateStreaming' in WebAssembly) {
 			WebAssembly.instantiateStreaming(fetch(path), go.importObject).then(function (obj) {

web/scripts/index.js

@@ -5,10 +5,12 @@ import wfaInit from "../modules/wfa.js";
 
 window.addEventListener("DOMContentLoaded", init);
 
+var wfa;
+
 async function init () {
 	setAppearance();
 
-	wfaInit("modules/wfa.wasm");
+	wfa = await wfaInit("modules/wfa.wasm");
 	initInstances();
 
 	document.querySelector("#instance-add").addEventListener("click", handleInstanceAddButton);
@@ -272,8 +274,8 @@ function sortInstances () {
 		};
 		criteria = (item, query) => {
 			// lower is better
-			const { score, CIGAR } = global.wfa.wfAlign(query, item, penalties, true);
-			const alignment = global.wfa.DecodeCIGAR(CIGAR);
+			const { score, CIGAR } = wfa.wfAlign(query, item, penalties, true);
+			const alignment = wfa.DecodeCIGAR(CIGAR);
 			return { score: score / item.length, alignment };
 		};
 	}