Update index.js

source/index.js

@@ -1,7 +1,7 @@
 
 /* eslint-env es2015 */
-
 /* eslint-disable no-var */
+/* eslint-disable prefer-template */
 
 if (window.location.hostname.endsWith('.github.io')) {
     window.location.replace('https://netron.app');
@@ -10,11 +10,11 @@ if (window.location.hostname.endsWith('.github.io')) {
 window.exports = {};
 
 window.exports.require = function(id, callback) {
-    var url = new URL(`${id}.js`, window.location.href).href;
+    var url = window.location.href + id + '.js';
     var scripts = document.head.getElementsByTagName('script');
     for (var i = 0; i < scripts.length; i++) {
         if (url === scripts[i].getAttribute('src')) {
-            throw new Error(`Duplicate import of '${url}'.`);
+            throw new Error("Duplicate import of '" + url + "'.");
         }
     }
     var script = document.createElement('script');
@@ -29,7 +29,7 @@ window.exports.require = function(id, callback) {
     var errorHandler = function(e) {
         script.removeEventListener('load', loadHandler);
         script.removeEventListener('error', errorHandler);
-        callback(null, new Error(`The script '${e.target.src}' failed to load.`));
+        callback(null, new Error("The script '" + e.target.src + "' failed to load."));
     };
     /* eslint-enable no-use-before-define */
     script.addEventListener('load', loadHandler, false);
@@ -40,9 +40,9 @@ window.exports.require = function(id, callback) {
 
 window.exports.preload = function(callback) {
     var modules = [
-        [ './view' ],
-        [ './json', './xml', './protobuf', './hdf5', './grapher', './browser' ],
-        [ './base', './text', './flatbuffers', './flexbuffers', './zip',  './tar', './python', './dagre' ]
+        [ 'view' ],
+        [ 'json', 'xml', 'protobuf', 'hdf5', 'grapher', 'browser' ],
+        [ 'base', 'text', 'flatbuffers', 'flexbuffers', 'zip',  'tar', 'python', 'dagre' ]
     ];
     var next = function() {
         if (modules.length === 0) {
@@ -97,7 +97,8 @@ window.addEventListener('error', function (event) {
 });
 
 window.addEventListener('load', function() {
-    if (!Symbol || !Symbol.asyncIterator || !DataView.prototype.getBigInt64 || !DataView.prototype.getBigUint64) {
+    if (typeof Symbol !== 'function' || typeof Symbol.asyncIterator !== 'symbol' ||
+        typeof BigInt !== 'function' || typeof BigInt.asIntN !== 'function' || typeof BigInt.asUintN !== 'function') {
         throw new Error('Your browser is not supported.');
     }
     window.exports.preload(function(value, error) {