Scaffolding

source/Page/Laboratory/Laboratory.scss

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+.main {
+    div.a {
+        font-size: 2.5em;
+        background-color: rgb(175, 204, 166);
+    }
+}

source/Page/Laboratory/Laboratory.tsx

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+import { Component, ReactNode } from "react";
+import { render } from "react-dom";
+import { Group } from "@Model/Group";
+import "./Laboratory.scss";
+
+class Test extends Component {
+    render(): ReactNode {
+        return <div className="main">
+            <div className="a">it work</div>
+            <div>ok</div>
+        </div>
+    }
+}
+
+render(
+    <Test></Test>, 
+    document.getElementById("root")
+);
+
+console.log(new Group);