diff --git a/thisthat/index.html b/thisthat/index.html
new file mode 100644
index 0000000..9c4e595
--- /dev/null
+++ b/thisthat/index.html
@@ -0,0 +1,20 @@
+<!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>
+</head>
+<body>
+
+<button  id="button">boom</button>
+<button  id="button1">boom</button>
+<button  id="button2">boom</button>
+<button  id="button3">boom</button>
+
+<script src="main.js" type="module"></script>
+
+</body>
+</html>
\ No newline at end of file
diff --git a/thisthat/main.js b/thisthat/main.js
new file mode 100644
index 0000000..62b8954
--- /dev/null
+++ b/thisthat/main.js
@@ -0,0 +1,40 @@
+
+class FatBoom{
+    word(){
+        return "boom de fat classe";
+    }
+
+    boom = (evt) => {
+        alert(this.word())
+    }
+}
+
+class Boom{
+    word(){
+        return "boom de classe";
+    }
+
+    boom(evt){
+        alert(this.word())
+    }
+}
+
+function boom(){
+    alert("hello world")
+}
+
+const fatBoom = () => {
+    alert("HELLO WORLD")
+}
+
+document.getElementById("button")
+    .addEventListener("click", boom)
+
+document.getElementById("button1")
+    .addEventListener("click", fatBoom)
+
+document.getElementById("button2")
+    .addEventListener("click", (new Boom()).boom)
+
+document.getElementById("button3")
+    .addEventListener("click", (new FatBoom()).boom)
\ No newline at end of file