Fix demo in IE 11

wimpyprogrammer · wimpyprogrammer · commit 893a6cb4ca60 · 2018-09-13T21:01:20.000-05:00
Polyfill Map and Array.from using polyfill.io.
diff --git a/demo/index.html b/demo/index.html
@@ -24,6 +24,8 @@
 	<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootswatch/4.1.3/flatly/bootstrap.min.css"
 	 integrity="sha256-O7FfDCaEf9kSRN9b9kmWu8C3rhL1hxEpPHp+CTZ4pMk=" crossorigin="anonymous" />
 	<link rel="stylesheet" href="styles.css" />
+
+	<script src="https://cdn.polyfill.io/v2/polyfill.js?features=Array.from,Map&flags=gated"></script>
 </head>
 
 <body>
diff --git a/src/demo.ts b/src/demo.ts
@@ -38,12 +38,16 @@ function displayPattern(pattern: string) {
 }
 
 function onClickGenerate() {
-	if (!$form.reportValidity()) {
-		return;
+	try {
+		if (!$form.reportValidity()) {
+			return;
+		}
+	} catch (ex) {
+		// Ignore browsers that don't support reportValidity()
 	}
 
 	let words = $input.value;
-	const delimiter = $delimiter.selectedOptions[0].value;
+	const delimiter = $delimiter.options[$delimiter.selectedIndex].value;
 	const isCaseSensitive = $caseSensitive.checked;
 	const isWhitespaceTrimmed = $trim.checked;
 
diff --git a/src/utils/pattern.ts b/src/utils/pattern.ts
@@ -9,7 +9,7 @@ import { ICharTrie } from '../types/charTrie';
  */
 export function build(charTrie: ICharTrie): string {
 	const patternSegments = Array.from(
-		charTrie,
+		[...charTrie],
 		([head, suffixTrie]) => `${head}${build(suffixTrie)}`
 	);
 
