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jquery實現判斷輸入文字個數的代碼

  1、js代碼部分

<script type="text/javascript">
$(function() {

function albumName() {
var text = $("#album_name").val();
var counter = text.length;
$("#numtj var").text(counter);
$(document).keyup(function() {
var text = $("#album_name").val();
var counter = text.length;
$("#name_word").text(counter);
});
}
});
</script>

2、html部分

<input type="text" maxlength="30" class="int_txt" name="album_name" id="album_name">
<span class="count_txt"><span id="name_word">0</span>/30</span>

3、貼張圖看下效果

 

1、js代碼部分

<script type="text/javascript">
$(function() {

        function albumName() {
   var text = $("#album_name").val();
var counter = text.length;
   $("#numtj var").text(counter);
$(document).keyup(function() {
 var text = $("#album_name").val();
  var counter = text.length;
$("#name_word").text(counter);
});
 }
  });
</script>

2、html部分

<input type="text" maxlength="30" class="int_txt" name="album_name" id="album_name">
<span class="count_txt"><span id="name_word">0</span>/30</span>

3、貼張圖看下效果

 

1、js代碼部分

<script type="text/javascript">
$(function() {

        function albumName() {
   var text = $("#album_name").val();
var counter = text.length;
   $("#numtj var").text(counter);
$(document).keyup(function() {
 var text = $("#album_name").val();
  var counter = text.length;
$("#name_word").text(counter);
});
 }
  });
</script>

2、html部分

<input type="text" maxlength="30" class="int_txt" name="album_name" id="album_name">
<span class="count_txt"><span id="name_word">0</span>/30</span>

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