Pinterest風サイト

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Pintrest風サイト</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            background-color: #f0f0f0;
        }

        header {
            background-color: #333;
            color: #fff;
            padding: 20px;
            text-align: center;
        }

        .container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 20px;
            padding: 20px;
            margin: 0 auto;
            max-width: 1200px;
        }

        .card {
            background-color: #fff;
            border: 1px solid #ddd;
            border-radius: 5px;
            overflow: hidden;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
            transition: transform 0.3s ease;
            cursor: pointer;
        }

        .card:hover {
            transform: translateY(-5px);
        }

        .card img {
            width: 100%;
            display: block;
            border-top-left-radius: 5px;
            border-top-right-radius: 5px;
        }

        .card-content {
            padding: 15px;
        }

        .card h2 {
            font-size: 18px;
            margin: 10px 0;
            color: #333;
        }

        .card p {
            font-size: 14px;
            color: #666;
            margin-top: 0;
        }

        .modal {
            display: none;
            position: fixed;
            z-index: 999;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0,0,0,0.7);
        }

        .modal-content {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background-color: #fff;
            padding: 20px;
            border-radius: 5px;
        }

        .modal img {
            max-width: 100%;
            display: block;
            margin: 0 auto;
        }

        footer {
            background-color: #333;
            color: #fff;
            text-align: center;
            padding: 10px 0;
            margin-top: 20px;
        }
    </style>
</head>
<body>
    <header>
        <h1>Pintrest風サイト</h1>
    </header>

    <main>
        <div class="container">
            <div class="card" onclick="openModal('https://via.placeholder.com/800x600', 'Beautiful Sunset', 'Lorem ipsum dolor sit amet, consectetur adipiscing elit.')">
                <img src="https://via.placeholder.com/400x250" alt="Image 1">
                <div class="card-content">
                    <h2>Beautiful Sunset</h2>
                    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
                </div>
            </div>
            <div class="card" onclick="openModal('https://via.placeholder.com/800x600', 'Cute Kittens', 'Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.')">
                <img src="https://via.placeholder.com/400x300" alt="Image 2">
                <div class="card-content">
                    <h2>Cute Kittens</h2>
                    <p>Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.</p>
                </div>
            </div>
            <!-- More cards -->
        </div>
    </main>

    <div id="myModal" class="modal">
        <div class="modal-content">
            <span class="close" onclick="closeModal()">&times;</span>
            <img src="" alt="Modal Image" id="modalImage">
            <div id="caption"></div>
        </div>
    </div>

    <footer>
        <p>&copy; 2024 Pintrest風サイト</p>
    </footer>

    <script>
        function openModal(imageSrc, title, description) {
            document.getElementById("modalImage").src = imageSrc;
            document.getElementById("caption").innerHTML = "<h2>" + title + "</h2><p>" + description + "</p>";
            document.getElementById("myModal").style.display = "block";
        }

        function closeModal() {
            document.getElementById("myModal").style.display = "none";
        }
    </script>
</body>
</html>

CSS 画像を左右に振り分ける

index.html

<!DOCTYPE html>
<html lang="ja">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>My Flexbox</title>
  <link rel="stylesheet" href="style.css">
</head>

<body>
  <article>
    <img src="forest.png" width="240" height="160">
    <div class="text">
      <h1>タイトル</h1>
      <p>こんにちは。こんにちは。こんにちは。こんにちは。こんにちは。こんにちは。こんにちは。こんにちは。</p>
    </div>
  </article>
  <article>
    <img src="forest.png" width="240" height="160">
    <div class="text">
      <h1>タイトル</h1>
      <p>こんにちは。こんにちは。こんにちは。こんにちは。こんにちは。こんにちは。こんにちは。こんにちは。</p>
    </div>
  </article>
  <article>
    <img src="forest.png" width="240" height="160">
    <div class="text">
      <h1>タイトル</h1>
      <p>こんにちは。こんにちは。こんにちは。こんにちは。こんにちは。こんにちは。こんにちは。こんにちは。</p>
    </div>
  </article>
  <article>
    <img src="forest.png" width="240" height="160">
    <div class="text">
      <h1>タイトル</h1>
      <p>こんにちは。こんにちは。こんにちは。こんにちは。こんにちは。こんにちは。こんにちは。こんにちは。</p>
    </div>
  </article>
</body>

</html>

style.css

@charset "utf-8";

article {
  display: flex;
  gap: 16px;
  align-items: center;
}

article+article {
  margin-top: 32px;
}

article:nth-child(even) {
  flex-direction: row-reverse;
}

.text {
  flex: 1;
}

h1 {
  margin: 0;
  font-size: 22px;
}

HTMLCSS 画像付きの記事一覧を作る

index.html

<!DOCTYPE html>
<html lang="ja">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>My Flexbox</title>
  <link rel="stylesheet" href="style.css">
</head>

<body>
  <article>
    <img src="forest.png" width="240" height="160">
    <div class="text">
      <h1>タイトル</h1>
      <p>こんにちは。こんにちは。</p>
    </div>
  </article>
</body>

</html>

style.css

@charset "utf-8";

article {
  display: flex;
  gap: 16px;
}

.text {
  background: pink;
  flex: 1;
}

Slack風チャットボットサイト

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Slack風チャットボット</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
        }

        .chat-container {
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
        }

        .chat-window {
            width: 400px;
            background-color: #f4f4f4;
            border: 1px solid #ddd;
            border-radius: 5px;
            padding: 20px;
        }

        .chat-messages {
            height: 300px;
            overflow-y: auto;
            border-bottom: 1px solid #ddd;
            margin-bottom: 10px;
        }

        #message-input {
            width: 100%;
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 5px;
            margin-bottom: 10px;
        }

        button {
            padding: 10px 20px;
            background-color: #007bff;
            color: #fff;
            border: none;
            border-radius: 5px;
            cursor: pointer;
        }

        button:hover {
            background-color: #0056b3;
        }
    </style>
</head>
<body>
    <div class="chat-container">
        <div class="chat-window">
            <div class="chat-messages" id="chat-messages">
                <!-- チャットメッセージが表示される部分 -->
            </div>
            <input type="text" id="message-input" placeholder="メッセージを入力してください...">
            <button onclick="sendMessage()">送信</button>
        </div>
    </div>

    <script>
        function sendMessage() {
            var messageInput = document.getElementById('message-input');
            var message = messageInput.value.trim();

            if (message !== '') {
                var chatMessages = document.getElementById('chat-messages');
                var messageElement = document.createElement('div');
                messageElement.textContent = message;
                chatMessages.appendChild(messageElement);
                messageInput.value = '';

                // メッセージをバックエンドに送信
                fetch('/send_message', {
                    method: 'POST',
                    headers: {
                        'Content-Type': 'application/json'
                    },
                    body: JSON.stringify({ message: message })
                });
            }
        }
    </script>
</body>
</html>

CSS align-self､autoキーワード

index.html

<!DOCTYPE html>
<html lang="ja">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>My Flexbox</title>
  <link rel="stylesheet" href="style.css">
</head>

<body>
  <div class="container">
    <div class="item-1">1</div>
    <div class="item-2">2</div>
    <div class="item-3">3</div>
  </div>
</body>

</html>

style.css

@charset "utf-8";

.container {
  border: 8px solid blue;
  display: flex;
  height: 240px;
}

.item-1 {
  width: 80px;
  height: 80px;
  background-color: pink;
  align-self: center;
}

.item-2 {
  width: 80px;
  height: 80px;
  background-color: skyblue;
  margin-left: auto;
}

.item-3 {
  width: 80px;
  height: 80px;
  background-color: orange;
}

CSS フレックスコンテナを設定

index.html

<!DOCTYPE html>
<html lang="ja">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>My Flexbox</title>
  <link rel="stylesheet" href="style.css">
</head>

<body>
  <div class="container">
    <div class="item-1">1</div>
    <div class="item-2">2</div>
    <div class="item-3">3</div>
  </div>
  <div class="container">
    <div class="item-1">1</div>
    <div class="item-2">2</div>
    <div class="item-3">3</div>
  </div>
</body>

</html>

style.css

@charset "utf-8";

.container {
  border: 8px solid blue;
  /* display: flex; */
  display: inline-flex;
  width: 280px;
}

.item-1 {
  width: 80px;
  height: 80px;
  background-color: pink;
}

.item-2 {
  width: 80px;
  height: 80px;
  background-color: skyblue;
}

.item-3 {
  width: 80px;
  height: 80px;
  background-color: orange;
}

Social Networking Service

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Social Networking Service</title>
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css" rel="stylesheet">
<style>
  body {
    padding: 20px;
  }
  .card {
    margin-bottom: 20px;
  }
</style>
</head>
<body>

<div class="container">
  <h1 class="text-center mb-4">Social Networking Service</h1>

  <!-- ログインフォーム -->
  <div id="loginForm" class="card w-50 mx-auto">
    <div class="card-body">
      <h2 class="card-title text-center mb-4">Login</h2>
      <div class="form-group">
        <input type="text" id="loginUsername" class="form-control" placeholder="Username">
      </div>
      <div class="form-group">
        <input type="password" id="loginPassword" class="form-control" placeholder="Password">
      </div>
      <button onclick="login()" class="btn btn-primary btn-block">Login</button>
      <button onclick="registerForm()" class="btn btn-secondary btn-block">Register</button>
    </div>
  </div>

  <!-- 登録フォーム -->
  <div id="registerForm" class="card w-50 mx-auto" style="display: none;">
    <div class="card-body">
      <h2 class="card-title text-center mb-4">Register</h2>
      <div class="form-group">
        <input type="text" id="registerName" class="form-control" placeholder="Full Name">
      </div>
      <div class="form-group">
        <input type="text" id="registerUsername" class="form-control" placeholder="Username">
      </div>
      <div class="form-group">
        <input type="password" id="registerPassword" class="form-control" placeholder="Password">
      </div>
      <button onclick="register()" class="btn btn-primary btn-block">Register</button>
      <button onclick="loginForm()" class="btn btn-secondary btn-block">Back to Login</button>
    </div>
  </div>

  <!-- プロフィール -->
  <div id="profile" class="card w-50 mx-auto" style="display: none;">
    <div class="card-body">
      <h2 class="card-title text-center mb-4">Profile</h2>
      <p><strong>Name:</strong> <span id="profileName"></span></p>
      <p><strong>Username:</strong> <span id="profileUsername"></span></p>
      <button onclick="logout()" class="btn btn-danger btn-block">Logout</button>
    </div>
  </div>

  <!-- 投稿フォーム -->
  <div id="postForm" class="card w-75 mx-auto" style="display: none;">
    <div class="card-body">
      <h2 class="card-title text-center mb-4">Create Post</h2>
      <div class="form-group">
        <textarea id="postContent" class="form-control" rows="3" placeholder="What's on your mind?"></textarea>
      </div>
      <button onclick="createPost()" class="btn btn-primary btn-block">Post</button>
    </div>
  </div>

  <!-- 投稿一覧 -->
  <div id="postList" class="w-75 mx-auto mt-4"></div>
</div>

<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.5.4/dist/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>
<script>
  let currentUser = null; // 現在のログインユーザー
  let users = []; // ユーザーの配列
  let posts = []; // 投稿の配列

  function login() {
    const username = document.getElementById('loginUsername').value;
    const password = document.getElementById('loginPassword').value;
    const user = users.find(u => u.username === username && u.password === password);
    if (user) {
      currentUser = user;
      showProfile();
    } else {
      alert('Invalid username or password.');
    }
  }

  function logout() {
    currentUser = null;
    hideAll();
    document.getElementById('loginForm').style.display = 'block';
  }

  function registerForm() {
    hideAll();
    document.getElementById('registerForm').style.display = 'block';
  }

  function register() {
    const name = document.getElementById('registerName').value;
    const username = document.getElementById('registerUsername').value;
    const password = document.getElementById('registerPassword').value;
    users.push({ name, username, password });
    alert('Registration successful! Please login.');
    loginForm();
  }

  function loginForm() {
    hideAll();
    document.getElementById('loginForm').style.display = 'block';
  }

  function showProfile() {
    hideAll();
    document.getElementById('profile').style.display = 'block';
    document.getElementById('profileName').textContent = currentUser.name;
    document.getElementById('profileUsername').textContent = currentUser.username;
    document.getElementById('postForm').style.display = 'block';
    displayPosts();
  }

  function createPost() {
    const postContent = document.getElementById('postContent').value;
    if (postContent.trim() !== '') {
      const post = {
        id: Date.now(),
        content: postContent,
        author: currentUser.name,
        authorUsername: currentUser.username,
        likes: 0,
        comments: []
      };
      posts.unshift(post); // 最新の投稿を先頭に追加
      displayPosts();
      document.getElementById('postContent').value = ''; // 投稿後、入力欄を空にする
    }
  }

  function displayPosts() {
    const postList = document.getElementById('postList');
    postList.innerHTML = '';
    posts.forEach(post => {
      const postElement = document.createElement('div');
      postElement.innerHTML = `
        <div class="card mb-3">
          <div class="card-body">
            <p class="card-text">${post.content}</p>
            <small class="text-muted">Posted by ${post.author} (@${post.authorUsername}) at ${new Date(post.id).toLocaleString()}</small><br>
            <button onclick="likePost(${post.id})" class="btn btn-primary btn-sm mt-2">Like (${post.likes})</button>
            <button onclick="showComments(${post.id})" class="btn btn-secondary btn-sm mt-2">Comments</button>
          </div>
        </div>
      `;
      postList.appendChild(postElement);
    });
  }

  function likePost(postId) {
    const post = posts.find(p => p.id === postId);
    post.likes++;
    displayPosts();
  }

  function showComments(postId) {
    const post = posts.find(p => p.id === postId);
    const comments = prompt('Enter your comment:');
    if (comments !== null && comments.trim() !== '') {
      post.comments.push({ author: currentUser.name, content: comments });
      displayPosts();
    }
  }

  function hideAll() {
    document.getElementById('loginForm').style.display = 'none';
    document.getElementById('registerForm').style.display = 'none';
    document.getElementById('profile').style.display = 'none';
    document.getElementById('postForm').style.display = 'none';
  }

  users.push({ name: 'User One', username: 'user1', password: 'password1' });
  users.push({ name: 'User Two', username: 'user2', password: 'password2' });

  hideAll();
  document.getElementById('loginForm').style.display = 'block';
</script>

</body>
</html>

Javascript 文字列の整形

index.html

<!DOCTYPE html>
<html lang="ja">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>My JavaScript</title>
</head>
<body>
  <script src="main.js"></script>
</body>
</html>

main.js

'use strict';

{
  const string = prompt('Name?');
  //if(string.toLowerCase() === 'taro'){
  if(string.toUpperCase().trim() === 'TARO'){
    console.log('Corrent!');
  }else{
    console.log('Wrong!');
  }
}

ruby メソッドをオーバーライド

class Score
  def initialize(subject, score)
    @subject = subject
    @score = score
  end

  def get_info
    "#{@subject}/#{@score} -> #{get_result}"
  end

  private

  def get_result
    @score >= 80 ? "Pass" : "Fail"
  end
end

class MathScore < Score
  def initialize(score)
    super("Math", score)
  end

  private 

  # ovierride
  def get_result
  @score >= 50 ? "Pass" : "Fail"
  end
end

class EnglishScore < Score
  def initialize(score)
    super("English", score)
  end
end

class User
  def initialize(name, score)
    @name = name
    @score = score
  end

  def get_info
    "Name: #{@name}, Score: #{@score.get_info}"
  end
end

user1 = User.new("Taro", MathScore.new(70))
user2 = User.new("Jiro", EnglishScore.new(90))
puts user1.get_info
puts user2.get_info

ruby 子クラス

class Score
  def initialize(subject, score)
    @subject = subject
    @score = score
  end

  def get_info
    "#{@subject}/#{@score} -> #{get_result}"
  end

  private

  def get_result
    @score >=80 ? "Pass" : "Fail"
  end
end

class MathScore < Score
  def initialize(score)
  super("Math", score)
  end
end

class EnglishScore < Score
 def initialize(score)
  super("Math", score)
  end
end

class User
  def initialize(name, score)
    @name = name
    @score = score
  end

  def get_info
    "Name: #{@name}, Score: #{@score.get_info}"
  end
end

user1 = User.new("Taro", MathScore.new(70))
user2 = User.new("Jiro", EnglishScore.new(90))
puts user1.get_info
puts user2.get_info