Question

var x= $('div.text').text();
var first15=x.substring(0, 55);
$(".text").html(first15);

if ($(".text").html(first15).length == 55) {
  $('.ShowText').show();

}

.text
{
  width:100px;
  height:100px;
  border:1px solid #000;
  overflow: hidden;
  font-size:10px;
  position:relative;
 }

.ShowText
{
  display:none;
  color:red; 
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="text">.Why do we use it?
It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using 'Content here, content here', making it look like readable English. Many desktop publishing packages and web page editors now use Lorem Ipsum as their default model text, and a search for 'lorem ipsum' will uncover many web sites still in their infancy. Various versions have evolved over the years, sometimes by accident, sometimes on purpose (injected humour and the like).
  

</div>
<div class="ShowText">Show more...</div>

您好，只有当文本有55个字符时才可以show（）class =“ShowText”吗？但是当我添加“=”时总是显示“ShowText”

感谢您的回答

Answer 1

只使用这个

(first15.length == 55)

因为length

$(".text").html(first15).length

这里length是jquery方法，它将返回该元素中的元素数为1.因此1不等于55。

在substring（）文本后显示div

1 个答案: