Migrate Index page to React (#952)

src/Index.tsx

@@ -0,0 +1,66 @@
+import React, { useState } from "react";
+import ReactDOM from "react-dom";
+import Arrow from "../images/Arrow.svg";
+import CosmosDB_20170829 from "../images/CosmosDB_20170829.svg";
+import Explorer from "../images/Explorer.svg";
+import Feedback from "../images/Feedback.svg";
+import Quickstart from "../images/Quickstart.svg";
+import "../less/index.less";
+
+const Index = (): JSX.Element => {
+  const [navigationSelection, setNavigationSelection] = useState("quickstart");
+
+  const quickstart_click = () => {
+    setNavigationSelection("quickstart");
+  };
+
+  const explorer_click = () => {
+    setNavigationSelection("explorer");
+  };
+
+  return (
+    <React.Fragment>
+      <header className="header HeaderBg">
+        <div className="items">
+          <img className="DocDBicon" src={CosmosDB_20170829} alt="Azure Cosmos DB" />
+          <a className="createdocdbacnt" href="https://aka.ms/documentdbcreate" rel="noreferrer" target="_blank">
+            Create an Azure Cosmos DB account <img className="rightarrowimg" src={Arrow} alt="" />
+          </a>
+          <span className="title">Azure Cosmos DB Emulator</span>
+        </div>
+      </header>
+      <nav className="fixedleftpane">
+        <div
+          id="Quickstart"
+          onClick={quickstart_click}
+          className={navigationSelection === "quickstart" ? "topSelected" : ""}
+        >
+          <img id="imgiconwidth1" src={Quickstart} alt="Open Quick Start" />
+          <span className="menuQuickStart">Quickstart</span>
+        </div>
+
+        <div id="Explorer" onClick={explorer_click} className={navigationSelection === "explorer" ? "topSelected" : ""}>
+          <img id="imgiconwidth1" src={Explorer} alt="Open Data Explorer" />
+          <span className="menuExplorer">Explorer</span>
+        </div>
+
+        <div>
+          <a className="feedbackstyle" href="https://aka.ms/cosmosdbfeedback?subject=Cosmos%20DB%20Emulator%20Feedback">
+            <img id="imgiconwidth1" src={Feedback} alt="Report Issue" />
+            <span className="menuExplorer">Report Issue</span>
+          </a>
+        </div>
+      </nav>
+
+      {navigationSelection === "quickstart" && (
+        <iframe name="quickstart" className="iframe" src="quickstart.html"></iframe>
+      )}
+
+      {navigationSelection === "explorer" && (
+        <iframe name="explorer" className="iframe" src="explorer.html?platform=Emulator"></iframe>
+      )}
+    </React.Fragment>
+  );
+};
+
+ReactDOM.render(<Index />, document.getElementById("root"));