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== Какими программами и сайтами пользоваться ==

{|
|-
| [https://github.com/notepad-plus-plus/notepad-plus-plus/releases/download/v8.1.9/npp.8.1.9.Installer.exe Notepad++]

|-
| [https://code.visualstudio.com/Download VS Code]

|-
| [https://w3schools.com Справочник по всему в HTML]

|-
| [https://learn.javascript.ru/ Учебник по всему в JavaScript]


|}

== Материалы некоторых занятий ==

===21.10.2021===

====Списки====
lists.html
<source lang="html4strict">
<html>
    <head>
        <title>
            Lists
        </title>
    </head>
    <body>
        <ol>
            <li>List item 1</li>
            <li>List item 2</li>
            <li>List item 3</li>
            <li>List item 4</li>
        </ol>
        <ul>
            <li>unordered list item</li>
            <li>unordered list item</li>
            <li>unordered list item</li>
            <li>unordered list item</li>
            <li>unordered list item</li>
        </ul>
    </body>
</html>
</source>

====Формы (простой вариант)====
forms.html
<source lang="html4strict">
<html>
    <head>
        <title>Forms</title>
    </head>
    <body>
        <form>
            <input type="text" 
            placeholder="Type here..."
            name="just_text">
            <input type="submit" value="Ага, согласен">
        </form>
    </body>
</html>
</source>

====Формы (вариант посложнее)====
forms_extra.html
<source lang="html4strict">
<html>
    <head>
        <link rel="stylesheet" href="variables.css">
        <title>
            Forms (extra)
        </title>
    </head>
    <body>
        <form>
            <div>
                <p><input name="user_name" type="text" placeholder="User name"></p>
                <p><input name="password" type="password" placeholder="password"></p>
            </div>
            <div>
                Favorite color?
                <input name="color" type="radio" value="white"> White
                <input name="color" type="radio" value="black"> Black
                <input name="color" type="radio" value="red"> Red
                <input name="color" type="radio" value="blue"> Blue
                <input name="color" type="radio" value="green"> Green
            </div>
            <div>
                <input name="ocean" list="oceans" placeholder="Oceans">
                <datalist id="oceans">
                    <option value="Pacific">
                    <option value="Indian">
                    <option value="Atlantic">
                    <option value="Arctic">
                </datalist>
            </div>

            <div>
                <input type="checkbox" id="fav_oceans" name="fav_oceans" checked>
                <label for="pacific">Pacific</label>
            </div>
            <div>
                <input type="checkbox" id="fav_oceans" name="fav_oceans">
                <label for="indian">Indian</label>
            </div>
            </div>
            <div>
                <input type="checkbox" id="fav_oceans" name="fav_oceans">
                <label for="Arctic">Arctic</label>
            </div>
            <div>
                <input type="checkbox" id="fav_oceans" name="fav_oceans" checked>
                <label for="Atlantic">Atlantic</label>
            </div>
        </form>

    </body>
</html>
</source>

====Стили (inline, type)====
styles.html
<source lang="html4strict">
<html>
    <head>
        <title>Styles</title>
        <style>
            h1, h2 {
                color:red;
                text-align: center;
            }    
        </style>
    </head>
    <body>
        <h1>My first first heading!</h1>
        <h1 style="text-align:right;">Second heading here!</h1>
        <h2>Secret header</h1>
        Hello, world!
    </body>
</html>
</source>

====Стили (внешний css-файл)====
styles_css.html
<source lang="html4strict">
<html>
    <head>
        <link rel="stylesheet" href="styles.css">
        <title>Styles (CSS)</title>
    </head>
    <body>
        <h1>My first first heading!</h1>
        <h1 style="color:blue; text-align: right">Second heading here!</h1>
        Hello, world!
    </body>
</html>
</source>

styles.css
<source lang="css">
h1 {
    text-align:center;
    color:red;
}
</source>


===28.10.2021===
====Таблицы (+thead)====
<source lang="html4strict">
<html>
    <head>
        <link rel="stylesheet" href="variables.css">
        <title>
            Tables
        </title>
        <style>
            table {
                border: 1px solid black;
                border-collapse: collapse;
                margin: 10px;
            }
            /* td {
                border: 1px solid black;
            }
            th {
                border: 1px solid black;
            } */
            td, th {
                border: 1px solid black;
                padding: 10px;
            }
            
        </style>
    </head>
    <body>
        <table>
            <thead>
                <th>Ocean</th>
                <th>Max depth, m</th>
                <th>Avg depth, m</th>
            </thead>
            <tr>
                <td>Atlantic</td>
                <td>3646</td>
                <td>8486</td>
            </tr>
            <tr>
                <td>Pacific</td>
                <td>11022</td>
                <td>4000</td>
            </tr>
            <tr>
                <td>Indian</td>
                <td>8047</td>
                <td>3741</td>
            </tr>
        </table>
    </body>
</html>
</source>

====Области (div)====
<source lang="html4strict">
<html>
    <head>
        <title>div size</title>
        <style>
            div {
                border: 3px solid black;
                background-color:rgb(0, 183, 255);
                width: 550px;
                height: 400px;
                padding: 5px;
                margin: 10px;
                font-family: 'Courier New', Courier, monospace;
                font-size: 28px;
                /* font-weight: bold; */
            }
        </style>
    </head>
    <body>
        <div>
             <p>Это пример тега div</p>
             <p>А это вторая строка этого div</p>
        </div>
    </body>
</html>
</source>

====Styles (id, class)====
<source lang="html4strict">
<html>
    <head>
        <title>Style ids</title>
        <style>
            h1 {
                color:green;
            }
            .some_class {
                color: orange;
            }
            #some_id {
                color: blue;
            }    
        </style>
    </head>
    <body>
        <!-- <h1>My first heading!</h1>
        <h1 id="some_id">My second heading!</h1>
        <h1 id="another_id">My third heading!</h1> -->
        <h1 id="some_id">My first heading!</h1>
        <h1 class="some_class">My second heading!</h1>
        <h1 class="some_class">My third heading!</h1>
        Hello, world!
    </body>
</html>
</source>

====Изменение при наведении на объект (hover)====
<source lang="html4strict">
<html>
    <head>
        <title>
            Hover
        </title>
        <style>
            button {
                border-width: 1px;
                width: 200px;
                height: 50px;
                font-size: 25px;
                background-color: green;
            }
            button:hover {
                background-color: chocolate;
            }
        </style>
    </head>
    <body>
        <button>Click me</button>
    </body>
</html>
</source>


===11.11.2021===

====JavaScript и управление активностью кнопки====
lists.html
<source lang="html4strict">
<html>
    <head>
        <script>
            document.addEventListener("DOMContentLoaded", function(event) {
                document.getElementById('send').disabled = "true";
            });
            function myFunction() {
                var nameInput = document.getElementById('name').value;
                console.log(nameInput);
                if (nameInput === "") {
                    document.getElementById('send').disabled = true;
                } else {
                        document.getElementById('send').disabled = false;
                }
            }
        </script>
    </head>
    <body>
        <form action="sent.php" method="post" name="frm">
            <input type="text" name="name_input" id="name" onkeyup="myFunction()"><br>
            <button type="submit" class="button button-dark" id="send">Send message</button>
          </form>
    </body>
</html>
</source>


===18.11.2021===

Удивительный [http://howtocenterincss.com/ сайт], где можно узнать, как написать CSS-код для выравнивания в разных обстоятельствах.

====Несколько div, выравнивание, реакция на hover====
lists.html
<source lang="html4strict">
<html>
    <head>
        <title>
            Hover
        </title>
        <style>
            #div_header {
                width: 100%;
                height: 150px;
                font-size: 50px;
                font-family: Arial, Helvetica, sans-serif;
                text-align: center;
                vertical-align: middle;
                background-color: #667766;
            }
            .menu_item {
                border-width: 1px;
                width: 300px;
                height: 100px;
                margin-top: 5px;
                line-height: 100px;
                font-size: 30px;
                text-align: center;
                background-color: #AABBDD;
            }
            .menu_item:hover {
                background-color: #BBCCEE;
            }
        </style>
    </head>
    <body>
        <div id="div_header">HEADER</div>
        <div class="menu_item">menu item 1</div>
        <div class="menu_item"> menu item 2</div>
        <div class="menu_item">menu item 3</div>
    </body>
</html>
</source>


===02.12.2021===

Как использовать [https://developer.mozilla.org/ru-RU/docs/Web/CSS/CSS_Grid_Layout/Basic_Concepts_of_Grid_Layout grid] и [https://developer.mozilla.org/ru-RU/docs/Web/CSS/CSS_Flexible_Box_Layout/Basic_Concepts_of_Flexbox flexbox] для вёрстки "прямоугольного" сайта.

====Простой пример с вёрсткой grid/flexbox====
flex-example.html
<source lang="css">
<html>
<head>
<title>Document</title>
    <link rel="stylesheet" href="flex-example.css">
</head>
<body>
    <div class="container">
        <div class="header">
            Header
            <div class="app_logo">My App</div>
            <div class="home">Home</div>
            <div class="search">Search</div>
            <div class="logout">Log out</div>
        </div>
        <div class="sidebar">
            Sidebar
        </div>
        <div class="content">
            Content
        </div>
        <div class="footer">
            Footer
        </div>
    </div>
</body>
</html>
</source>


flex-example.css
<source lang="css">
html, body {
    margin: 0;
    padding: 0;
}

.container {
    /* background-color: gainsboro;
    padding: 10px; */
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    grid-template-rows: 10vh 80vh 10vh;
}

.header {
    background-color: coral;
    padding: 10px;
    grid-column: 1 / -1;
    display: flex;
    flex-direction: row;
    /* justify-content: start;
    justify-content: center;
    justify-content: space-between;
    justify-content: space-around; */
    justify-content: space-evenly;
}

/* .search {
    margin-left: auto;
} */

.sidebar {
    background-color: darkgoldenrod;
    padding: 10px;
    grid-column: 1 / 2;
}

.content {
    background-color: darkseagreen;
    padding: 10px;
    grid-column: 2 / -1;
}

.footer {
    background-color: dimgrey;
    padding: 10px;
    grid-column: 1 / -1;
}
</source>


===09.12.2021===

Дополнение к предыдущему коду, использование flex для вариантов выравнивания по горизонтали.

====Пример с вёрсткой grid/flexbox: выравниваем заголовок====
flex-example.html
<source lang="css">
<html>
<head>
<title>Document</title>
    <link rel="stylesheet" href="flex-example.css">
</head>
<body>
    <div class="container">
        <div class="header">
            <div class="header_left_part">
                <div class="app_logo">My App</div>
                <div class="home">Home</div>
            </div>
            <div class="header_right_part">
                <div class="search">Search</div>
                <div class="logout">Log out</div>
            </div>
        </div>
        <div class="sidebar">
            <div class="menu_item">Menu item 1</div>
            <div class="menu_item">Menu item 2</div>
            <div class="menu_item">Menu item 3</div>
            <div class="menu_item">Menu item 4</div>
        </div>
        <div class="content">
            Contentem grew ghr guhr geqhr uqhre gheq r
        </div>
        <div class="footer">
            Footer
        </div>
    </div>
</body>
</html>
</source>


flex-example.css
<source lang="css">
html, body {
    margin: 0;
    padding: 0;
}

.container {
    /* background-color: gainsboro;
    padding: 10px; */
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    grid-template-rows: 20vh 60vh 20vh;
}

.header {
    border-color: blue;
    border-style: double;
    background-color: coral;
    color: white;
    grid-column: 1 / -1;
    padding: 0px;
    display: flex;
}

.header_left_part {
    width: 100%;
    border-color: yellow;
    border-style: double;
    display: flex;
}

.header_right_part {
    width: 20%;
    border-color: red;
    border-style: double;
    display: flex;
    /* margin-left: auto; */
    justify-content: flex-end;
}

.app_logo {
    padding: 5px;
}

.home {
    padding: 5px;
}

.search {
    padding: 5px;
}

.logout {
    padding: 5px;
}

.sidebar {
    background-color: darkgoldenrod;
    padding: 10px;
    grid-column: 1 / 5;
}

.content {
    background-color: darkseagreen;
    padding: 10px;
    grid-column: 5 / -1;
}

.footer {
    background-color: dimgrey;
    padding: 10px;
    grid-column: 1 / -1;
}
</source>

===13.01.2022===

Пара примеров того, как можно использовать JS (Javascript) на своей странице.

====Создание элементов при загрузке окна (onload) и изменение свойств существующих объектов====
DOM_example_1.html
<source lang='html4strict'>
<html>
  <head>
    <script>
       // run this function when the document is loaded
       window.onload = function() {

         // create a couple of elements in an otherwise empty HTML page
         const heading = document.createElement("h1");
         const heading_text = document.createTextNode("Это header, который был сделан кодом на JS!");
         heading.appendChild(heading_text);
         document.body.appendChild(heading);
      }
    </script>
  </head>
  <body>
        <div id="test">default text</div>
        <input type="button" style="width:200px;height:50px" value="Click me!" onclick="document.getElementById('test').textContent='Привет-привет!'"></button>
  </body>
</html>
</source>

===27.01.2022===

Как обойтись без flex/grid (древние таблицы приходят на помощь)

====Задаём структуру страницы таблицами====
table_design.html
<source lang='html4strict'>
<html>
    <head>
        <title>Это заголовок</title>
    </head>
    <body width="100%" height="100%">
        <table border=1 width=100% height=100%>
            <tr>
                <td height=20% colspan="2">...</td>
            </tr>
            <tr>
                <td width=20%>
                    Item 1
                </td>
                <td rowspan="3">
                    Основной контент
                </td>
            </tr>
            <tr>
                <td>
                    Item 2
                </td>
            </tr>
            <tr>
                <td>
                    Item 3
                </td>
            </tr>
        </table>
    </body>
</html></source>

===10.02.2022===

Создание динамического меню с помощью JavaScript/CSS

====Выпадающее меню====
drop_down.html
<source lang='html4strict'>
<html>
    <head>

        <script>
            /* When the user clicks on the button,
            toggle between hiding and showing the dropdown content */
            function myFunction() {
                document.getElementById("myDropdown").classList.toggle("show");
            }

            // Close the dropdown menu if the user clicks outside of it
            window.onclick = function(event) {
            if (!event.target.matches('.dropbtn')) {
                var dropdowns = document.getElementsByClassName("dropdown-content");
                var i;
                for (i = 0; i < dropdowns.length; i++) {
                    var openDropdown = dropdowns[i];
                    if (openDropdown.classList.contains('show')) {
                        openDropdown.classList.remove('show');
                    }
                }
            }
            }
        </script>

        <style>
            /* Dropdown Button */
            .dropbtn {
            background-color: #3498DB;
            color: white;
            padding: 16px;
            font-size: 16px;
            border: none;
            cursor: pointer;
            }

            /* Dropdown button on hover & focus */
            .dropbtn:hover, .dropbtn:focus {
            background-color: #2980B9;
            }

            /* The container <div> - needed to position the dropdown content */
            .dropdown {
            position: relative;
            display: inline-block;
            }

            /* Dropdown Content (Hidden by Default) */
            .dropdown-content {
            display: none;
            position: absolute;
            background-color: #f1f1f1;
            min-width: 160px;
            box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
            z-index: 1;
            }

            /* Links inside the dropdown */
            .dropdown-content a {
            color: black;
            padding: 12px 16px;
            text-decoration: none;
            display: block;
            }

            /* Change color of dropdown links on hover */
            .dropdown-content a:hover {background-color: #ddd}

            /* Show the dropdown menu (use JS to add this class to the .dropdown-content container when the user clicks on the dropdown button) */
            .show {display:block;}
        </style>
    </head>

    <body>
        <div class="dropdown">
            <button onclick="myFunction()" class="dropbtn">Dropdown</button>
            <div id="myDropdown" class="dropdown-content">
              <a href="#">Link 1</a>
              <a href="#">Link 2</a>
              <a href="#">Link 3</a>
            </div>
        </div>
    </body>

</html>
</source>

Обработка вводимого текста и изменение атрибутов объектов на странице

====Активная/неактивная кнопка====
activate_button.html
<source lang='html4strict'>
<html>
    <head>
        <title>
            Activate button by entering text
        </title>
        <script type="text/javascript">
            function Disabled_change(text) {
                // alert(text)
                if (text == "123") {
                    document.getElementById("clickme").disabled = false;
                }
                else {
                    document.getElementById("clickme").disabled = true;
                }
            }
        </script>
    </head>
    <body>
        <input type="text" id="pwd" onkeyup="Disabled_change(document.getElementById('pwd').value)">
        <button id="clickme" disabled>Click</button>
    </body>
</html>
</source>