javascript - 如果不满足最大长度，如何重新启用屏幕键盘-6ren

javascript - 如果不满足最大长度，如何重新启用屏幕键盘

转载作者：太空宇宙更新时间：2023-11-04 06:17:03

我有一个 ul li 键盘，它先输入 4 个数字，然后输入 3 个字母，然后自行禁用。但是，如果用户单击删除按钮，它不会自行重新启用。

我想“如果我只是添加 .removeClass('disabled') 如果长度小于 8，它可能会起作用。但我很确定这不是它的工作原理。请帮助我。

$(function() {
  var $write = $('#write'),
    symbols = $('.symbol'),
    letters = $('.letter'),
    shift = false,
    capslock = false;

  $('#keyboard li').click(function() {
    var $this = $(this),
      character = $this.html(); // If it's a lowercase letter, nothing happens to this variable

    // Shift keys
    if ($this.hasClass('left-shift') || $this.hasClass('right-shift')) {
      $('.letter').toggleClass('uppercase');
      $('.symbol span').toggle();

      shift = (shift === true) ? false : true;
      capslock = false;
      return false;
    }

    // Caps lock
    if ($this.hasClass('capslock')) {
      $('.letter').toggleClass('uppercase');
      capslock = true;
      return false;
    }

    // Delete
    if ($this.hasClass('delete')) {
      var html = $write.html();
      $write.html(html.substr(0, html.length - 1));
      return false;
    }

    // Special characters
    if ($this.hasClass('symbol')) character = $('span:visible', $this).html();
    if ($this.hasClass('space')) character = ' ';
    if ($this.hasClass('tab')) character = "\t";
    if ($this.hasClass('return')) character = "\n";

    // Uppercase letter
    if ($this.hasClass('uppercase')) character = character.toUpperCase();

    // Remove shift once a key is clicked.
    if (shift === true) {
      $('.symbol span').toggle();
      if (capslock === false) $('.letter').toggleClass('uppercase');

      shift = false;
    }


    $write.html($write.html() + character);
    text1 = document.getElementById('write').value;
    console.log(text1);
    if (text1.length >= 4) {
      symbols.addClass('disabled');
      letters.removeClass('disabled');
      if (text1.length == 7) {
        letters.addClass('disabled');


      }

    }
    if (text1.length > 7) {
      letters.removeClass('disabled');
    }





    // Add the character

  });
});

html {
  width: 100%;
  height: auto;
}

body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: auto;
}

.maincontainer {
  background-image: url(b.png);
  background-repeat: repeat-y;
  background-position: right;
}


/*head*/

.nav-text {
  vertical-align: middle;
  color: white;
}

.row {
  padding: 15px;
  display: flex;
  justify-content: center;
}

.back-button {
  height: 100%;
}

#backer {
  float: left;
  width: auto;
}

.red {
  background-color: darkred;
}

.header {
  text-align: center;
  color: white;
  font-size: 25px;
  float: left;
  width: 90%;
}

.uk-icon {
  color: white;
}


/*main*/


/* Style the tab */

.tab {
  width: 100%;
  overflow: hidden;
}


/* Style the buttons inside the tab */

.tab button {
  width: 50%;
  background-color: inherit;
  float: left;
  border: none;
  background-color: darkred;
  color: white;
  outline: none;
  cursor: pointer;
  padding: 14px 16px;
  transition: 0.3s;
  font-size: 17px;
}

#tabone {
  border-top-left-radius: 5px;
  border-right: 1px solid white;
}

#tabtwo {
  border-top-right-radius: 5px;
  border-left: 1px solid white;
}


/* Change background color of buttons on hover */

.tab button:hover {
  background-color: rgb(80, 3, 3);
}


/* Create an active/current tablink class */

.tab button.active {
  background-color: rgb(180, 15, 15);
}


/* Style the tab content */

.tabcontent {
  display: none;
  padding: 6px 12px;
  border: 1px solid #ccc;
  border-top: none;
  background-color: white;
}

#London {
  text-align: center;
}

#searchbutton {
  background-color: darkred;
  color: white;
  border: 0;
  border-radius: 5px;
  margin-bottom: 15px;
  padding-right: 20px;
}

#write {
  width: 90%;
  height: 300px;
  background: url(https://upload.wikimedia.org/wikipedia/commons/thumb/1/13/Soyombo_red.svg/300px-Soyombo_red.svg.png) no-repeat scroll 50px 40px;
  background-size: 80PX;
  padding-left: 50px;
  border-radius: 5%;
  border: 1px solid black;
  margin-bottom: 20px;
  margin-top: 20px;
  text-align: center;
  font-size: 10vh;
}

#London>.container-fluid>h3 {
  margin-top: 5%;
  font-size: 4vh;
}

#keyboard {
  margin: 0;
  padding: 0;
  list-style: none;
  width: 100%;
}

#keyboard li {
  font-size: 30px;
  display: inline-block;
  margin: 0 5px 5px 0;
  width: 5%;
  padding: 0;
  height: 70px;
  line-height: 70px;
  text-align: center;
  background: #fff;
  border: 1px solid black;
  -moz-border-radius: 5px;
  -webkit-border-radius: 7PX;
  ;
}

#keyboard .delete {
  width: 120px;
}

.lastitem {
  margin-right: 0;
}

.uppercase {
  text-transform: uppercase;
}

.on {
  display: none;
}

#keyboard li:hover {
  position: relative;
  top: 1px;
  left: 1px;
  border-color: #e5e5e5;
  cursor: pointer;
}

#container.ul {
  margin: auto;
  float: center;
}

#container-x {
  width: 50%;
  margin: auto;
}

input[type=submit] {
  background: url(http://www.clker.com/cliparts/Y/3/d/w/R/r/search-icon-white-hi.png) no-repeat;
  background-size: 25%;
  background-position-y: 50%;
  background-position-x: 10%;
}

.disabled {
  opacity: 0.5;
  pointer-events: none;
}

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">

<head>

  <title>
    Payment
  </title>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/simple-keyboard@latest/build/css/index.css">
  <!-- Bootstrap CSS -->
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
  <!-- UIkit CSS -->
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/uikit/3.1.3/css/uikit.min.css" />
  <!-- UIkit JS -->
  <script src="https://cdnjs.cloudflare.com/ajax/libs/uikit/3.1.3/js/uikit.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/uikit/3.1.3/js/uikit-icons.min.js"></script>
  <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous">
  </script>
  <!-- My CSS & JS-->
  <script src="script.js"></script>
  <link rel="stylesheet" href="style.css" />
</head>

<body>
  <div class="maincontainer">
    <div class="container-fluid red">
      <div class="row">
        <div class="col-">
          <div class="back-button">
            <a id="backer" class="uk-button uk-button-default" href="#"><span uk-icon="icon:arrow-left;"></span><span class="nav-text">Эхлэх</span></a>
          </div>
        </div>
        <div class="col-xl">
          <div class="header">
            Тээврийн хэрэгслийн торгууль төлөх
          </div>
        </div>
        <div class="col-">
          <div class="header">
          </div>
        </div>
      </div>
    </div>

    <div class="uk-container">
      <img style="width: auto;">
      <div class="box">
        <div class="tab">
          <button uk-icon="bus" class="tablinks" id="tabone" onclick="openTab(event, 'London')">ТЭЭВРИЙН ХЭРЭГСЭЛ</button>
          <button class="tablinks" id="tabtwo" onclick="openTab(event, 'Paris')">ЖОЛООНЫ ҮНЭМЛЭХ</button>
        </div>
        <div id="London" class="tabcontent">
          <div class="container-fluid">
            <h3>АВТОМАШИНЫ УЛСЫН ДУГААР</h3>
            <div id="input_container">
              <textarea type="text" required id="write" maxLength="4" placeholder="UBA0000"></textarea>


            </div>
          </div>
          <div>
            <input type="submit" value="Хайх" id="searchbutton" class="uk-button uk-button-default" href="#"></input>
          </div>

          <div style="width:auto;margin: auto;" id="container">
            <ul style="display:table; width:100%;" id="keyboard">
              <li class="symbol"><span class="off">1</span></li>
              <li class="symbol"><span class="off">2</span></li>
              <li class="symbol"><span class="off">3</span></li>
              <li class="symbol"><span class="off">4</span></li>
              <li class="symbol"><span class="off">5</span></li>
              <li class="symbol"><span class="off">6</span></li>
              <li class="symbol"><span class="off">7</span></li>
              <li class="symbol"><span class="off">8</span></li>
              <li class="symbol"><span class="off">9</span></li>
              <li class="symbol"><span class="off">0</span></li>
              <li class="delete"><span class="delete"><img style="width:50%"
                                                                src="https://cdn3.iconfinder.com/data/icons/sympletts-part-1/128/backspace-256.png"></span></li>
              <br>
              <li class="letter disabled">Ф</li>
              <li class="letter disabled">Ц</li>
              <li class="letter disabled">У</li>
              <li class="letter disabled">Ж</li>
              <li class="letter disabled">Э</li>
              <li class="letter disabled">Н</li>
              <li class="letter disabled">Г</li>
              <li class="letter disabled">Ш</li>
              <li class="letter disabled">Ү</li>
              <li class="letter disabled">З</li>
              <li class="letter disabled">К</li>
              <li class="letter disabled">Ъ</li><br>
              <li class="letter disabled">Й</li>
              <li class="letter disabled">Ы</li>
              <li class="letter disabled">Б</li>
              <li class="letter disabled">Ө</li>
              <li class="letter disabled">А</li>
              <li class="letter disabled">Х</li>
              <li class="letter disabled">Р</li>
              <li class="letter disabled">О</li>
              <li class="letter disabled">Л</li>
              <li class="letter disabled">Д</li>
              <li class="letter disabled">П</li><br>
              <li class="letter disabled">Я</li>
              <li class="letter disabled">Ч</li>
              <li class="letter disabled">Е</li>
              <li class="letter disabled">Ё</li>
              <li class="letter disabled">С</li>
              <li class="letter disabled">М</li>
              <li class="letter disabled">И</li>
              <li class="letter disabled">Т</li>
              <li class="letter disabled">Ь</li>
              <li class="letter disabled">В</li>
              <li class="letter disabled">Ю</li>
            </ul>
            <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
          </div>
        </div>
      </div>

      <div id="Paris" class="tabcontent">
        <h3>Paris</h3>

      </div>
      <script>
        function openTab(evt, tabName) {
          var i, tabcontent, tablinks;
          tabcontent = document.getElementsByClassName("tabcontent");
          for (i = 0; i < tabcontent.length; i++) {
            tabcontent[i].style.display = "none";
          }
          tablinks = document.getElementsByClassName("tablinks");
          for (i = 0; i < tablinks.length; i++) {
            tablinks[i].className = tablinks[i].className.replace(" active", "");
          }
          document.getElementById(tabName).style.display = "block";
          evt.currentTarget.className += " active";
        }
      </script>



    </div>
  </div>
  </div>

</body>

</html>

除了缺少重要功能外，它可以做它需要做的事情。我没有足够的经验来解决这个问题。(p.s 这个键盘实际上不关心 textarea 字符限制，因为它不是 onkeypress，我不知道它是什么。所以我只是做了一些即兴创作来解决。如果你只是用你的键盘在上面写，它会最多输入 4 个字母，因为这是文本区域的限制。如果您使用屏幕键盘输入，您将得到 7 个。求助？)

(P.S.S:另外，为什么“左标签”在最小化时会继续向上？)

最佳答案

I thought "If I just add .removeClass('disabled') if the length is less than 8, it might work. But I'm pretty sure that's not how this works.

这是行不通的，因为当您处理删除按钮时，您使用了“return false;”，这意味着它将返回到那里并且不会继续运行您的代码到 .removeClass( '禁用') 部分。

我的解决方案是您需要处理删除功能中禁用的添加和删除，如下所示:

// Delete
if ($this.hasClass('delete')) {
    var html = $write.html();
    $write.html(html.substr(0, html.length - 1));

    //get text1 value from textarea
    text1 = document.getElementById('write').value;

    //When length < 4, just enable numbers, disable letters
    if (text1.length < 4)
    {
        symbols.removeClass('disabled');
        letters.addClass('disabled'); 
    }

    //When length >= 4, handle like your current code
    if (text1.length >= 4)
    {
        symbols.addClass('disabled');
        letters.removeClass('disabled'); 
         if(text1.length == 7){
            letters.addClass('disabled');

        }
    }

    return false;
}

因此在删除部分，您将处理虚拟键盘上的禁用。

从那以后，您可以在代码中删除这部分:

if (text1.length > 7) { letters.removeClass('disabled'); }

对于物理键盘输入，如果不想让用户使用，可以设置maxLength="0" 在 textarea 部分。

<textarea type="text" required id="write" maxLength="0" placeholder="UBA0000"></textarea>

请查看下面的演示以了解其工作原理。

快乐的编码时间:D。

$(function(){
		var $write = $('#write'),
		symbols = $('.symbol'),
		letters = $('.letter'),
		shift = false,
		capslock = false;
	
	$('#keyboard li').click(function(){
		var $this = $(this),
			character = $this.html(); // If it's a lowercase letter, nothing happens to this variable
		
		// Shift keys
		if ($this.hasClass('left-shift') || $this.hasClass('right-shift')) {
			$('.letter').toggleClass('uppercase');
			$('.symbol span').toggle();
			
			shift = (shift === true) ? false : true;
			capslock = false;
			return false;
		}
		
		// Caps lock
		if ($this.hasClass('capslock')) {
			$('.letter').toggleClass('uppercase');
			capslock = true;
			return false;
		}
		
		// Delete
		if ($this.hasClass('delete')) {
			var html = $write.html();
			$write.html(html.substr(0, html.length - 1));

			//get text1 value from textarea
			text1 = document.getElementById('write').value;
			
			//When length < 4, just enable numbers, disable letters
			if (text1.length < 4)
			{
				symbols.removeClass('disabled');
				letters.addClass('disabled'); 
			}
			
			//When length >= 4, handle like your current code
			if (text1.length >= 4)
			{
				symbols.addClass('disabled');
				letters.removeClass('disabled'); 
				 if(text1.length == 7){
					letters.addClass('disabled');
		
				}
			}
			return false;
		}
		
		// Special characters
		if ($this.hasClass('symbol')) character = $('span:visible', $this).html();
		if ($this.hasClass('space')) character = ' ';
		if ($this.hasClass('tab')) character = "\t";
		if ($this.hasClass('return')) character = "\n";
		
		// Uppercase letter
		if ($this.hasClass('uppercase')) character = character.toUpperCase();
		
		// Remove shift once a key is clicked.
		if (shift === true) {
			$('.symbol span').toggle();
			if (capslock === false) $('.letter').toggleClass('uppercase');
			
			shift = false;
		}
		
		
			$write.html($write.html() + character);
			text1 = document.getElementById('write').value;
			console.log(text1);
			if (text1.length >= 4)
			{
				symbols.addClass('disabled');
				letters.removeClass('disabled'); 
				 if(text1.length == 7){
					letters.addClass('disabled');
					
		
				}

			}
		
			

			

		// Add the character

	});
});

html{
    width: 100%;
    height: auto;

}
body{
    margin: 0;
    padding: 0;
    width: 100%;
    height: auto;
}
.maincontainer{
    background-image: url(b.png); 
    background-repeat:repeat-y;
    background-position: right;
}

/*head*/
.nav-text
{
    vertical-align: middle;
    color: white;
}
.row
{
    padding: 15px;
    display: flex;
    justify-content: center;
}
.back-button
{
    height: 100%;
}

#backer
{
    float: left;
    width: auto;
}
.red
{
    background-color: darkred;
}
.header
{
    text-align: center;
    color: white;
    font-size:25px;
    float: left;
    width:90%;
}
.uk-icon
{
    color:white;
}
/*main*/
/* Style the tab */
.tab {
    width: 100%;
    overflow: hidden;
  }
  
  /* Style the buttons inside the tab */
  .tab button {
    width: 50%;
    background-color: inherit;
    float: left;
    border: none;
    background-color: darkred;
    color: white;
    outline: none;
    cursor: pointer;
    padding: 14px 16px;
    transition: 0.3s;
    font-size: 17px;
  }
  #tabone
  {
      border-top-left-radius: 5px; 
      border-right: 1px solid white;
  }
  #tabtwo
  {
      border-top-right-radius: 5px; 
      border-left: 1px solid white;
  }

  
  /* Change background color of buttons on hover */
  .tab button:hover {
    background-color: rgb(80, 3, 3);
  }
  
  /* Create an active/current tablink class */
  .tab button.active {
    background-color: rgb(180, 15, 15);
  }
  /* Style the tab content */
  .tabcontent {
    display: none;
    padding: 6px 12px;
    border: 1px solid #ccc;
    border-top: none;
    background-color: white;
  }
  #London
  {
    text-align: center;
  }
  #searchbutton
  {
      background-color: darkred;
      color: white;
      border:0;
      border-radius: 5px;
      margin-bottom: 15px;
      padding-right:20px;

  }
  #write
  {
      width: 90%;
      height:300px;
      background: url(https://upload.wikimedia.org/wikipedia/commons/thumb/1/13/Soyombo_red.svg/300px-Soyombo_red.svg.png) no-repeat scroll 50px 40px;
      background-size: 80PX;
      padding-left:50px;
      border-radius: 5%;
      border: 1px solid black;
      margin-bottom: 20px;
      margin-top:20px;
      text-align: center;
      font-size:10vh;
  }

  #London > .container-fluid > h3{
      margin-top:5%;
      font-size: 4vh;
  }
  #keyboard {
    margin: 0;
    padding: 0;
    list-style: none;
    width: 100%;
}

#keyboard li {
    font-size: 30px;
    display: inline-block;
    margin: 0 5px 5px 0;
    width: 5%;
    padding: 0;
    height: 70px;
    line-height: 70px;
    text-align: center;
    background: #fff;
    border: 1px solid black;
    -moz-border-radius: 5px;
    -webkit-border-radius: 7PX;;
}

#keyboard .delete {
    width: 120px;
}

.lastitem {
    margin-right: 0;
}

.uppercase {
    text-transform: uppercase;
}

.on {
    display: none;
}

#keyboard li:hover {
    position: relative;
    top: 1px;
    left: 1px;
    border-color: #e5e5e5;
    cursor: pointer;
}
#container.ul{
    margin:auto;
    float: center;
}

#container-x
{
    width: 50%;
    margin: auto;
}
input[type=submit]
{
    background:url(http://www.clker.com/cliparts/Y/3/d/w/R/r/search-icon-white-hi.png) no-repeat;
    background-size: 25%;
    background-position-y: 50%;
    background-position-x: 10%;
}
.disabled
{
    opacity: 0.5;
    pointer-events: none;
}

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
    <head>

        <title>
            Payment
        </title>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/simple-keyboard@latest/build/css/index.css">
        <!-- Bootstrap CSS -->
        <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">    
        <!-- UIkit CSS -->
        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/uikit/3.1.3/css/uikit.min.css" />
        <!-- UIkit JS -->
        <script src="https://cdnjs.cloudflare.com/ajax/libs/uikit/3.1.3/js/uikit.min.js"></script>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/uikit/3.1.3/js/uikit-icons.min.js"></script>
        <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"
            integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous">
        </script>
        <!-- My CSS & JS-->
        <script src="script.js"></script>
        <link rel="stylesheet" href="style.css"/>
    </head>
    <body>
        <div class="maincontainer">
        <div class="container-fluid red">
                        <div class="row">
                            <div class="col-">        
                                    <div class="back-button">
                                            <a id="backer" class="uk-button uk-button-default" href="#"><span uk-icon="icon:arrow-left;"></span><span class="nav-text">Эхлэх</span></a>
                                        </div>                       
                                </div>
                                <div class="col-xl">
                                <div class="header">
                                        Тээврийн хэрэгслийн торгууль төлөх
                                </div>
                                </div>   
                                <div class="col-">
                                        <div class="header">
                                        </div>   
                            </div>
                        </div>
        </div>
    
        <div class="uk-container">
            <img style="width: auto;">
            <div class="box">
                    <div class="tab">
                            <button uk-icon="bus" class="tablinks" id="tabone" onclick="openTab(event, 'London')">ТЭЭВРИЙН ХЭРЭГСЭЛ</button>
                            <button class="tablinks" id="tabtwo" onclick="openTab(event, 'Paris')">ЖОЛООНЫ ҮНЭМЛЭХ</button>
                            </div>
                            <div id="London" class="tabcontent">
                                    <div class="container-fluid">
                                    <h3>АВТОМАШИНЫ УЛСЫН ДУГААР</h3>
                                        <div id="input_container">
                                                <textarea type="text" required id="write" maxLength="0" placeholder="UBA0000"></textarea>   
                                                
                                                                      
                                            </div>
                                            </div>
                                        <div>
                                           <input type="submit"  value="Хайх" id="searchbutton" class="uk-button uk-button-default" href="#"></input>
                                        </div>
                                        
                                        <div style="width:auto;margin: auto;" id="container">
                                                <ul style="display:table; width:100%;" id="keyboard">
                                                    <li class="symbol"><span class="off">1</span></li>
                                                    <li class="symbol"><span class="off">2</span></li>
                                                    <li class="symbol"><span class="off">3</span></li>
                                                    <li class="symbol"><span class="off">4</span></li>
                                                    <li class="symbol"><span class="off">5</span></li>
                                                    <li class="symbol"><span class="off">6</span></li>
                                                    <li class="symbol"><span class="off">7</span></li>
                                                    <li class="symbol"><span class="off">8</span></li>
                                                    <li class="symbol"><span class="off">9</span></li>
                                                    <li class="symbol"><span class="off">0</span></li>
                                                    <li class="delete"><span class="delete"><img style="width:50%"
                                                                src="https://cdn3.iconfinder.com/data/icons/sympletts-part-1/128/backspace-256.png"></span></li>
                                                    <br>
                                                    <li class="letter disabled">Ф</li>
                                                    <li class="letter disabled">Ц</li>
                                                    <li class="letter disabled">У</li>
                                                    <li class="letter disabled">Ж</li>
                                                    <li class="letter disabled">Э</li>
                                                    <li class="letter disabled">Н</li>
                                                    <li class="letter disabled">Г</li>
                                                    <li class="letter disabled">Ш</li>
                                                    <li class="letter disabled">Ү</li>
                                                    <li class="letter disabled">З</li>
                                                    <li class="letter disabled">К</li>
                                                    <li class="letter disabled">Ъ</li><br>
                                                    <li class="letter disabled">Й</li>
                                                    <li class="letter disabled">Ы</li>
                                                    <li class="letter disabled">Б</li>
                                                    <li class="letter disabled">Ө</li>
                                                    <li class="letter disabled">А</li>
                                                    <li class="letter disabled">Х</li>
                                                    <li class="letter disabled">Р</li>
                                                    <li class="letter disabled">О</li>
                                                    <li class="letter disabled">Л</li>
                                                    <li class="letter disabled">Д</li>
                                                    <li class="letter disabled">П</li><br>
                                                    <li class="letter disabled">Я</li>
                                                    <li class="letter disabled">Ч</li>
                                                    <li class="letter disabled">Е</li>
                                                    <li class="letter disabled">Ё</li>
                                                    <li class="letter disabled">С</li>
                                                    <li class="letter disabled">М</li>
                                                    <li class="letter disabled">И</li>
                                                    <li class="letter disabled">Т</li>
                                                    <li class="letter disabled">Ь</li>
                                                    <li class="letter disabled">В</li>
                                                    <li class="letter disabled">Ю</li>
                                                </ul>
                                                <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
                                            </div>
                                    </div>
                                  </div>
                                  
                                  <div id="Paris" class="tabcontent">
                                    <h3>Paris</h3>
                                   
                                  </div>
                                  <script>
                                        function openTab(evt, tabName) {
                                          var i, tabcontent, tablinks;
                                          tabcontent = document.getElementsByClassName("tabcontent");
                                          for (i = 0; i < tabcontent.length; i++) {
                                            tabcontent[i].style.display = "none";
                                          }
                                          tablinks = document.getElementsByClassName("tablinks");
                                          for (i = 0; i < tablinks.length; i++) {
                                            tablinks[i].className = tablinks[i].className.replace(" active", "");
                                          }
                                          document.getElementById(tabName).style.display = "block";
                                          evt.currentTarget.className += " active";
                                        }
                                        </script>



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        </div>

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</html>

关于javascript - 如果不满足最大长度，如何重新启用屏幕键盘，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/55860569/

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javascript - 如果不满足最大长度，如何重新启用屏幕键盘