Chap04 -> Styling components with CSS modules

QandA/frontend/src/App.css

@@ -1,38 +0,0 @@
-.App {
-  text-align: center;
-}
-
-.App-logo {
-  height: 40vmin;
-  pointer-events: none;
-}
-
-@media (prefers-reduced-motion: no-preference) {
-  .App-logo {
-    animation: App-logo-spin infinite 20s linear;
-  }
-}
-
-.App-header {
-  background-color: #282c34;
-  min-height: 100vh;
-  display: flex;
-  flex-direction: column;
-  align-items: center;
-  justify-content: center;
-  font-size: calc(10px + 2vmin);
-  color: white;
-}
-
-.App-link {
-  color: #61dafb;
-}
-
-@keyframes App-logo-spin {
-  from {
-    transform: rotate(0deg);
-  }
-  to {
-    transform: rotate(360deg);
-  }
-}

QandA/frontend/src/App.module.css

@@ -0,0 +1,5 @@
+.container {
+  font-family: 'Segoe UI', 'Helvetica', sans-serif;
+  font-size: 16px;
+  color: #5c5a5a;
+}

QandA/frontend/src/App.tsx

@@ -1,11 +1,11 @@
 import React from 'react';
 import { Header } from './Header';
-import './App.css';
+import style from './App.module.css';
 import { HomePage } from './HomePage';
 
 function App() {
   return (
-    <div className="App">
+    <div className={style.container}>
       <Header />
       <HomePage />
     </div>

QandA/frontend/src/Header.module.css

@@ -0,0 +1,13 @@
+.container {
+    position: fixed;
+    box-sizing: border-box;
+    top: 0;
+    width: 100%;
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 10px 20px;
+    background-color: #fff;
+    border-bottom: 1px solid #e3e2e2;
+    box-shadow: 0 3px 7px 0 rgba(110, 112, 114, 0.21);
+}

QandA/frontend/src/Header.tsx

@@ -1,13 +1,24 @@
 import React from 'react';
 import { UserIcon } from './Icons';
+import style from './Header.module.css';
 
-export const Header = () => (
-  <div>
-    <a href="./">Q & A</a>
-    <input type="text" placeholder="Search ..." />
-    <a href="./signin">
-      <UserIcon />
-      <span>Sign In</span>
-    </a>
-  </div>
-);
+export const Header = () => {
+  const handleSearchInputChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+    console.log(e.currentTarget.value);
+  };
+
+  return (
+    <div className={style.container}>
+      <a href="./">Q & A</a>
+      <input
+        type="text"
+        placeholder="Search ..."
+        onChange={handleSearchInputChange}
+      />
+      <a href="./signin">
+        <UserIcon />
+        <span>Sign In</span>
+      </a>
+    </div>
+  );
+};

QandA/frontend/src/HomePage.tsx

@@ -1,13 +1,37 @@
 import React from 'react';
+import { PageTitle } from './PageTitle';
+import { Page } from './Page';
 import { QuestionList } from './QuestionList';
-import { getUnansweredQuestions } from './QuestionsData';
+import { getUnansweredQuestions, QuestionData } from './QuestionsData';
 
-export const HomePage = () => (
-  <div>
-    <div>
-      <h2>Unanswered Questions</h2>
-      <button>Ask a question</button>
-    </div>
-    <QuestionList data={getUnansweredQuestions()} />
-  </div>
-);
+export const HomePage = () => {
+  const [questions, setQuestions] = React.useState<QuestionData[]>([]);
+  const [questionsLoading, setQuestionsLoading] = React.useState(true);
+
+  React.useEffect(() => {
+    const doGetUnansweredQuestion = async () => {
+      const unanswereedQuestions = await getUnansweredQuestions();
+      setQuestions(unanswereedQuestions);
+      setQuestionsLoading(false);
+    };
+    doGetUnansweredQuestion();
+  }, []);
+
+  const handleAskQuestionClick = () => {
+    console.log('TODO - move to the AskPage');
+  };
+
+  return (
+    <Page>
+      <div>
+        <PageTitle>Unanswered Questions</PageTitle>
+        <button onClick={handleAskQuestionClick}>Ask a question</button>
+      </div>
+      {questionsLoading ? (
+        <div>Loading...</div>
+      ) : (
+        <QuestionList data={questions || []} />
+      )}
+    </Page>
+  );
+};

QandA/frontend/src/Page.tsx

@@ -0,0 +1,15 @@
+import React from 'react';
+import { PageTitle } from './PageTitle';
+
+interface Props {
+  title?: string;
+  children: React.ReactNode;
+}
+
+export const Page = ({ title, children }: Props) => (
+  <div>
+    {title && <PageTitle>{title}</PageTitle>}
+    {children}
+    {/* Component nested within Page component will be rendere here */}
+  </div>
+);

QandA/frontend/src/PageTitle.tsx

@@ -0,0 +1,5 @@
+import React from 'react';
+interface Props {
+  children: React.ReactNode;
+}
+export const PageTitle = ({ children }: Props) => <h2>{children}</h2>;

QandA/frontend/src/QuestionsData.ts

@@ -48,6 +48,11 @@ const questions: QuestionData[] = [
   },
 ];
 
-export const getUnansweredQuestions = (): QuestionData[] => {
+export const getUnansweredQuestions = async (): Promise<QuestionData[]> => {
+  await wait(500);
   return questions.filter((q) => q.answers.length === 0);
 };
+
+const wait = (ms: number): Promise<void> => {
+  return new Promise((resolve) => setTimeout(resolve, ms));
+};

QandA/frontend/src/index.css

@@ -1,13 +1,4 @@
 body {
   margin: 0;
-  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
-    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
-    sans-serif;
-  -webkit-font-smoothing: antialiased;
-  -moz-osx-font-smoothing: grayscale;
-}
-
-code {
-  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
-    monospace;
+  background-color: #f7f8fa;
 }