nicer generator based capitlizeFirstLetter

lib/html-elements-webpack-plugin.js

@@ -1,17 +1,23 @@
 const RE_ENDS_WITH_BS = /\/$/;
 
-function capitlizeFirstLetter(str) {
-	let [first, ...rest] = str;
-	first = first.toUpperCase();
-	return [first, ...rest].join('');
+function* capitlizeFirstLetter(str) {
+	for (let [i, l] of Array.from(str).entries()) {
+		yield (i === 0) ? l.toUpperCase() : l;
+	}
+}
+
+function* capitalizeWordsArray(rest) {
+	for (let word of rest) {
+		yield* capitlizeFirstLetter(word);
+	}
 }
 
 function kebbabCase2CamelCase(str) {
 	const strArr = str.split('-');
 	if (strArr.length < 2) return str;
 	let [first, ...rest] = strArr;
-	rest = rest.map(capitlizeFirstLetter);
-	return [first, ...rest].join('');
+	const restGen = capitalizeWordsArray(rest);
+	return [first, ...restGen].join('');
 }
 
 function compatAddPlugin(tappable, hookName, callback, async = false, forType = null) {