Add a github corner

package.json

@@ -1,7 +1,7 @@
 {
   "homepage": "https://Qingquan-Li.github.io/blog",
   "name": "blog",
-  "version": "2.0.0",
+  "version": "2.1.0",
   "private": true,
   "dependencies": {
     "@testing-library/jest-dom": "^5.16.4",

src/App.js → src/App.jsx

@@ -1,12 +1,14 @@
 import React from 'react';
 import './App.css';
 import TableOfContents from './components/TableOfContents';
+import GithubCorner from './components/GithubCorner';
 
 function App() {
   return (
     <div className="container blog-contents-container">
-      <div class="row">
+      <div className="row">
         <TableOfContents />
+        <GithubCorner />
       </div>
     </div>
   );

src/components/GithubCorner.css

@@ -0,0 +1,27 @@
+.github-corner:hover .octo-arm {
+  animation: octocat-wave 560ms ease-in-out
+}
+
+@keyframes octocat-wave {
+  0%,
+  100% {
+    transform: rotate(0)
+  }
+  20%,
+  60% {
+    transform: rotate(-25deg)
+  }
+  40%,
+  80% {
+    transform: rotate(10deg)
+  }
+}
+
+@media (max-width:500px) {
+  .github-corner:hover .octo-arm {
+    animation: none
+  }
+  .github-corner .octo-arm {
+    animation: octocat-wave 560ms ease-in-out
+  }
+}

src/components/GithubCorner.jsx

@@ -0,0 +1,55 @@
+// https://tholman.com/github-corners/
+
+import React from 'react';
+import './GithubCorner.css';
+
+export default function GithubCorner() {
+  const svgStyle = {
+    fill: "#151513",
+    color: "#fff",
+    position: "absolute",
+    top: 0,
+    border: 0,
+    right: 0,
+  };
+  const path02Style = {
+    transformOrigin: "130px 106px",
+  };
+  return (
+    <>
+      <a href="https://github.com/Qingquan-Li/blog/tree/react-blog"
+        className="github-corner" aria-label="View source on GitHub">
+        <svg width="80" height="80" viewBox="0 0 250 250"
+          style={svgStyle} aria-hidden="true">
+          <path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z">
+          </path>
+          <path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,
+            82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,
+            80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2"
+            fill="currentColor" style={path02Style} className="octo-arm">
+          </path>
+          <path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,
+            101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,
+            74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,
+            49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,
+            56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,
+            73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,
+            93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,
+            112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,
+            120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z"
+            fill="currentColor" className="octo-body">
+          </path>
+        </svg>
+      </a>
+      {/*
+        <style>
+        .github-corner:hover .octo-arm{animation:octocat-wave 560ms ease-in-out}
+        @keyframes octocat-wave{0 %, 100 % { transform: rotate(0) }20%,
+          60%{transform:rotate(-25deg)}40%,80%{transform:rotate(10deg)}}
+        @media (max-width:500px){.github - corner:hover .octo-arm{animation:none}
+          .github-corner .octo-arm{animation:octocat-wave 560ms ease-in-out}}
+        </style>
+      */}
+    </>
+  );
+}