added example

classes/index.html

@@ -0,0 +1,14 @@
+<!doctype html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport"
+          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
+    <meta http-equiv="X-UA-Compatible" content="ie=edge">
+    <title>Document</title>
+    <script type="module" src="main.js"></script>
+</head>
+<body>
+
+</body>
+</html>

classes/main.js

@@ -0,0 +1,36 @@
+class CaseUtil{
+    toSnakeCase(s){
+        return s.replaceAll(" ", "_");
+    }
+
+    toKebabCase(s){
+        return s.replaceAll(" ", "-");
+    }
+
+
+    toCamelCase(s){
+        while(s.indexOf(" ") !== -1){
+            const idx = s.indexOf(" ");
+            s = s.replace(" ", "");
+            const capital = s.substring(idx, idx + 1).toUpperCase();
+            s = s.substring(0, idx) + capital + s.substring(idx + 1, s.length);
+        }
+        return s;
+    }
+
+    // bonjour le monde --> bonjouRlEmondE
+    toAlexandreCase(s){
+        const ret = [];
+        for(const word of s.split(" ")){
+            const lastLetterCapitalized = word.substring(word.length - 1, word.length).toUpperCase();
+            const wordWithLastLetterCapitalized = word.substring(0, word.length - 1) + lastLetterCapitalized;
+            ret.push(wordWithLastLetterCapitalized)
+        }
+        return ret.join("");
+    }
+
+}
+
+const caseUtil = new CaseUtil();
+
+alert(caseUtil.toAlexandreCase("bonjour le monde"))