根据输入的字符动态增加输入类型文本文本框的宽度

2022-01-13 00:00:00 textbox jquery javascript html

我有一个 textbox,用户可以在其中输入任意数量的字符,但我希望它的 宽度根据输入的字符数动态增加.

I have a textbox where the user can enter any number of characters, But I want its width to be increased dynamically with respect to the number of characters entered into it.

我已经完成了如下所示的解决方法,它可以部分工作,它会动态增加宽度但不是那么精确,并且会在一段时间后隐藏第一个输入的字符,因为我在其中应用了糟糕的逻辑.我刚刚给出了 17 个字符的狂野截止值来开始增量.

I have done a workaround shown below and it works partially, it will increase the width dynamically but not so precisely and will hide the first entered characters after a while because of my poor logic applied in it. I've just given a wild cutoff of 17 characters count to start the increment.

只有在字符数达到文本框末尾时才开始增加宽度.

更新:

我希望显示在该字段中输入的所有字符,而默认情况下,文本框会隐藏最左边的字符.

FIDDLE 演示

HTML

<input type="text" id="txtbox" />

脚本

$('#txtbox').keypress(function() {
    var txtWidth = $(this).width();
    var cs = $(this).val().length;

    if(cs>17){
       $(this).width(txtWidth+5);
    }
});

推荐答案

我已经尝试过这段代码,它运行良好.

I have tried this code and it works fine.

<html>
<head>
  <script type="text/javascript">
     function Expand(obj){
      if (!obj.savesize) obj.savesize=obj.size;
      obj.size=Math.max(obj.savesize,obj.value.length);
     }
  </script>
  </head>
  <body>
     <form>
       <input  type="text" size="5" style="font-family:Courier;" onkeyup="Expand(this);">
     </form>
  </body>
</html>

请务必在文本框中使用单空间字体,否则大小 attr.并且字符数不匹配

Be sure to use mono space fonts in text box, otherwise the size attr. and number of characters won't match

相关文章