タグ: CSS

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>

TailwindCSS Todoリスト

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Todo List with Tailwind CSS</title>
    <link href="https://cdn.jsdelivr.net/npm/tailwindcss@2.2.19/dist/tailwind.min.css" rel="stylesheet">
</head>
<body class="bg-gray-100 h-screen flex justify-center items-center">
    <div class="max-w-md w-full">
        <h1 class="text-center text-2xl font-bold mb-4">Todo List</h1>
        <div class="bg-white shadow-md rounded px-8 pt-6 pb-8 mb-4">
            <div class="mb-4">
                <input type="text" placeholder="Add new task..." class="shadow appearance-none border rounded w-full py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline" id="taskInput">
            </div>
            <div class="flex items-center justify-between">
                <button class="bg-blue-500 hover:bg-blue-700 text-white font-bold py-2 px-4 rounded focus:outline-none focus:shadow-outline" id="addTaskBtn">
                    Add Task
                </button>
                <div>
                    <button class="bg-gray-300 hover:bg-gray-400 text-gray-800 font-bold py-2 px-4 rounded focus:outline-none focus:shadow-outline filter-btn" data-filter="all">
                        All
                    </button>
                    <button class="bg-gray-300 hover:bg-gray-400 text-gray-800 font-bold py-2 px-4 rounded focus:outline-none focus:shadow-outline filter-btn" data-filter="active">
                        Active
                    </button>
                    <button class="bg-gray-300 hover:bg-gray-400 text-gray-800 font-bold py-2 px-4 rounded focus:outline-none focus:shadow-outline filter-btn" data-filter="completed">
                        Completed
                    </button>
                </div>
            </div>
        </div>
        <ul id="taskList" class="bg-white shadow-md rounded px-8 pt-6 pb-8 mb-4">
            <!-- Tasks will be dynamically added here -->
        </ul>
        <div class="flex justify-between">
            <p id="taskCounter" class="text-gray-600"></p>
            <button class="bg-red-500 hover:bg-red-700 text-white font-bold py-2 px-4 rounded focus:outline-none focus:shadow-outline" id="clearCompletedBtn">
                Clear Completed
            </button>
        </div>
    </div>

    <script>
        let tasks = [];

        function renderTasks(filter) {
            const taskList = document.getElementById("taskList");
            taskList.innerHTML = "";

            tasks.forEach((task, index) => {
                if (filter === "all" || (filter === "active" && !task.completed) || (filter === "completed" && task.completed)) {
                    const listItem = document.createElement("li");
                    listItem.className = "flex justify-between items-center border-b py-2";
                    listItem.innerHTML = `
                        <span class="text-gray-700 ${task.completed ? 'line-through' : ''}">${task.text}</span>
                        <div>
                            <button class="text-green-500 hover:text-green-700 focus:outline-none" onclick="toggleTaskStatus(${index})">
                                ${task.completed ? `
                                    <svg xmlns="http://www.w3.org/2000/svg" class="h-5 w-5" viewBox="0 0 20 20" fill="currentColor">
                                        <path fill-rule="evenodd" d="M0 11l2-2 5 5L18 3l2 2L7 18z" clip-rule="evenodd" />
                                    </svg>
                                ` : `
                                    <svg xmlns="http://www.w3.org/2000/svg" class="h-5 w-5" viewBox="0 0 20 20" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
                                        <path d="M19 9l-9 9-5-5"></path>
                                    </svg>
                                `}
                            </button>
                            <button class="text-blue-500 hover:text-blue-700 focus:outline-none" onclick="editTask(${index})">
                                <svg xmlns="http://www.w3.org/2000/svg" class="h-5 w-5" viewBox="0 0 20 20" fill="currentColor">
                                    <path fill-rule="evenodd" d="M3 17a2 2 0 01-2-2V6a2 2 0 012-2h5a2 2 0 011 3.732V15h5a2 2 0 012 2v2a2 2 0 01-2 2H3zm12-7V5a1 1 0 00-1-1H7a1 1 0 00-1 1v5h9zm-4 3h2v2h-2v-2z" clip-rule="evenodd"></path>
                                </svg>
                            </button>
                            <button class="text-red-500 hover:text-red-700 focus:outline-none" onclick="deleteTask(${index})">
                                <svg xmlns="http://www.w3.org/2000/svg" class="h-5 w-5" viewBox="0 0 20 20" fill="currentColor">
                                    <path fill-rule="evenodd" d="M5.293 6.293a1 1 0 011.414 1.414L11 11.414l4.293-4.293a1 1 0 111.414 1.414L12.414 12l4.293 4.293a1 1 0 01-1.414 1.414L11 13.414l-4.293 4.293a1 1 0 01-1.414-1.414L9.586 12 5.293 7.707a1 1 0 010-1.414z" clip-rule="evenodd" />
                                </svg>
                            </button>
                        </div>
                    `;
                    taskList.appendChild(listItem);
                }
            });

            updateTaskCounter();
        }

        function addTask(text) {
            tasks.push({ text: text, completed: false });
            renderTasks();
        }

        function deleteTask(index) {
            tasks.splice(index, 1);
            renderTasks();
        }

        function editTask(index) {
            const newText = prompt("Edit Task", tasks[index].text);
            if (newText !== null) {
                tasks[index].text = newText.trim();
                renderTasks();
            }
        }

        function toggleTaskStatus(index) {
            tasks[index].completed = !tasks[index].completed;
            renderTasks();
        }

        function clearCompletedTasks() {
            tasks = tasks.filter(task => !task.completed);
            renderTasks();
        }

        function updateTaskCounter() {
            const taskCounter = document.getElementById("taskCounter");
            const activeTasks = tasks.filter(task => !task.completed).length;
            const taskWord = activeTasks === 1 ? "task" : "tasks";
            taskCounter.textContent = `${activeTasks} ${taskWord} left`;
        }

        document.getElementById("addTaskBtn").addEventListener("click", function() {
            const taskInput = document.getElementById("taskInput");
            const taskText = taskInput.value.trim();

            if (taskText !== "") {
                addTask(taskText);
                taskInput.value = "";
            }
        });

        document.getElementById("clearCompletedBtn").addEventListener("click", function() {
            clearCompletedTasks();
        });

        document.querySelectorAll(".filter-btn").forEach(btn => {
            btn.addEventListener("click", function() {
                const filter = this.getAttribute("data-filter");
                renderTasks(filter);
            });
        });

        // Initial render
        renderTasks();
    </script>
</body>
</html>

CSS クラスセレクター

index.html

@charset "utf-8";

body {
  margin: 0;
}

.container {
  width: 400px;
  margin: 32px auto 0;
  border: 8px solid blue;
}

.box-1 {
  width: 100px;
  height: 100px;
  background-color: pink;
}

.box-2 {
  width: 100px;
  height: 50px;
  background-color: skyblue;
}

.box-3 {
  width: 100px;
  height: 100px;
  background-color: orange;
}

style.css

@charset "utf-8";

body {
  margin: 0;
}

.container {
  width: 400px;
  margin: 32px auto 0;
  border: 8px solid blue;
}

.box-1 {
  width: 100px;
  height: 100px;
  background-color: pink;
}

.box-2 {
  width: 100px;
  height: 50px;
  background-color: skyblue;
}

.box-3 {
  width: 100px;
  height: 100px;
  background-color: orange;
}

GPT-2とWikipediaを使って生成するAI

GPT-2.py

from flask import Flask, render_template, request, redirect, url_for
from transformers import GPT2Tokenizer, GPT2LMHeadModel
import wikipedia

app = Flask(__name__)

# GPT-2のトークナイザーとモデルをロード
tokenizer = GPT2Tokenizer.from_pretrained("gpt2")
model = GPT2LMHeadModel.from_pretrained("gpt2")

@app.route('/')
def index():
    return render_template('index.html')

@app.route('/generate', methods=['POST'])
def generate_text():
    # ユーザーからの入力を取得
    prompt_text = request.form['prompt']
    
    try:
        # Wikipediaからテキストを取得
        wikipedia_text = wikipedia.summary(prompt_text)
        
        # テキストの生成
        inputs = tokenizer.encode(wikipedia_text, return_tensors="pt")
        outputs = model.generate(inputs, max_length=100, num_return_sequences=1, temperature=0.7)
        
        # 生成されたテキストをデコードしてHTMLコードに組み込む
        generated_text = tokenizer.decode(outputs[0], skip_special_tokens=True)
        
        # 生成されたテキストとWikipediaのテキストと共にHTMLを返す
        return render_template('index.html', prompt_text=prompt_text, generated_text=generated_text, wikipedia_text=wikipedia_text)
    
    except wikipedia.exceptions.DisambiguationError as e:
        # 曖昧性がある場合は、候補のリストを表示
        options = e.options
        return render_template('disambiguation.html', options=options)
    
    except wikipedia.exceptions.PageError:
        wikipedia_text = "Wikipediaにそのトピックが見つかりませんでした。"
        return render_template('index.html', prompt_text=prompt_text, wikipedia_text=wikipedia_text)

@app.route('/generate_with_option/<option>', methods=['GET'])
def generate_with_option(option):
    try:
        # Wikipediaからテキストを取得
        wikipedia_text = wikipedia.summary(option)
        
        # テキストの生成
        inputs = tokenizer.encode(wikipedia_text, return_tensors="pt")
        outputs = model.generate(inputs, max_length=100, num_return_sequences=1, temperature=0.7)
        
        # 生成されたテキストをデコードしてHTMLコードに組み込む
        generated_text = tokenizer.decode(outputs[0], skip_special_tokens=True)
        
        # 生成されたテキストとWikipediaのテキストと共にHTMLを返す
        return render_template('index.html', prompt_text=option, generated_text=generated_text, wikipedia_text=wikipedia_text)
    
    except wikipedia.exceptions.PageError:
        wikipedia_text = "Wikipediaにそのトピックが見つかりませんでした。"
        return render_template('index.html', prompt_text=option, wikipedia_text=wikipedia_text)

if __name__ == '__main__':
    app.run(debug=True)

templates/index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Generate Text</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            background-color: #f4f4f4;
        }

        h1 {
            text-align: center;
            margin-top: 50px;
        }

        form {
            max-width: 600px;
            margin: 0 auto;
            padding: 20px;
            background-color: #fff;
            border-radius: 8px;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
        }

        label {
            font-weight: bold;
        }

        input[type="text"] {
            width: 100%;
            padding: 10px;
            margin: 10px 0;
            border: 1px solid #ccc;
            border-radius: 4px;
        }

        button {
            padding: 10px 20px;
            background-color: #007bff;
            color: #fff;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            transition: background-color 0.3s ease;
        }

        button:hover {
            background-color: #0056b3;
        }

        .response {
            max-width: 600px;
            margin: 20px auto;
            padding: 20px;
            background-color: #fff;
            border-radius: 8px;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
        }

        .generated-text {
            margin-top: 20px;
        }

        .tweet-link {
            display: block;
            margin-top: 10px;
            text-align: center;
        }
    </style>
</head>
<body>
    <h1>Generate Text</h1>
    <form action="/generate" method="POST">
        <label for="prompt">Enter your prompt:</label><br>
        <input type="text" id="prompt" name="prompt"><br><br>
        <button type="submit">Generate</button>
    </form>

    <!-- 生成されたテキストを表示 -->
    {% if generated_text %}
    <div class="response">
        <h2>Generated Text:</h2>
        <p class="generated-text">{{ generated_text }}</p>
        <a href="https://twitter.com/intent/tweet?text={{ generated_text }}" class="tweet-link" target="_blank">Tweet</a>
    </div>
    {% endif %}
</body>
</html>

templates/disambiguation.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Disambiguation Page</title>
</head>
<body>
    <h1>Disambiguation</h1>
    <p>Multiple meanings were found for the provided prompt. Please select the intended meaning:</p>
    <ul>
        {% for option in options %}
            <li><a href="{{ url_for('generate_with_option', option=option) }}">{{ option }}</a></li>
        {% endfor %}
    </ul>
</body>
</html>

HTMLCSSJavascript Canvas

index.html

<!DOCTYPE html>
<html lang="ja">
<head>
  <meta charset="utf-8">
  <title>My Canvas</title>
  <link rel="stylesheet" href="css/styles.css">
</head>
<body>
  <canvas width="600" height="240">
    Canvas not supported.
  </canvas>

  <script src="js/main.js"></script>
</body>
</html>

css/styles.css

body {
  background: #222;
}
canvas {
  background: #fff;
}

js/main.js

'use strict';

{
  let t = 0;
  
  function draw() {
    const canvas = document.querySelector('canvas');
    if (typeof canvas.getContext === 'undefined') {
      return;
    }
    const ctx = canvas.getContext('2d');
    
    ctx.clearRect(0, 0, canvas.width, canvas.height);
    
    ctx.beginPath();
    ctx.ellipse(100, 100, 40, 30, 0, 0, 2 * Math.PI);
    ctx.fillStyle = 'black';
    ctx.fill();
    
    ctx.beginPath();
    ctx.ellipse( 80 + Math.sin(t / 30), 100, 8, 8, 0, 0, 2 * Math.PI);
    ctx.ellipse(120 + Math.sin(t / 30), 100, 8, 8, 0, 0, 2 * Math.PI);
    ctx.fillStyle = 'skyblue';
    ctx.fill();
    
    t++;
    setTimeout(draw, 10);
 }

  draw();
}
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CSSの基礎

CSS (Cascading Style Sheets)は、HTML文書などのマークアップ言語で書かれた文書の見た目を装飾するためのスタイルシート言語です。HTMLには構造やコンテンツを記述し、CSSはそれらの見た目を定義する役割を担います。

以下は、CSSの基礎についての説明です。

CSSの文法
CSSは、以下のような形式で文法が記述されます。
css
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セレクタ {
プロパティ: 値;
}
セレクタは、スタイルを適用するHTML要素を指定します。
{}内には、プロパティと値の組み合わせが記述されます。
プロパティは、スタイルを定義するための項目で、例えば、colorは文字色、background-colorは背景色などを指定するためのものです。
値は、プロパティに割り当てられる具体的な値で、例えば、redや#FFFFFFといった具体的な色を指定することができます。
スタイルの適用方法
CSSのスタイルをHTML文書に適用する方法には、以下の3つがあります。
インラインスタイル
HTMLタグのstyle属性にスタイルを直接指定する方法です。例えば、以下のように書くことで、colorプロパティにredを指定することができます。

css
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見出しのテキスト

内部スタイルシート
タグ内に


外部スタイルシート
CSSのスタイルを外部ファイルに記述し、HTML文書から参照する方法です。外部ファイルは、.css拡張子を持ち、タグを使用して読み込みます。例えば、以下のように書くことで、style.cssというファイルを読み込むことができます。

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以上が、CSSの基礎的な概念についての説明です。