Jquery .text().length 计数元素和字符的代码? [英] Jquery .text().length counting element's code as well as characters?

问题描述

我想检测一个 div 中的字符数量，如果少于 5 个就做一些事情:

var n = $("#mydiv").text().length;如果 (n <5){//做点什么}

但 'n' 似乎在计算用于 div 本身的代码:

所以即使 div 中没有字符:n = 23.

有谁知道一种方法可以将其调整为仅计算 div 本身内的字符数?

解决方案

修剪文本以排除文本中的前导和尾随空格

var n = $.trim($("#mydiv").text()).length;//如果你想支持IE9+，请使用String.trim()

演示:小提琴

• $.trim()
• String.trim()

I want to detect the amount of characters in a div and do something if there is less then five:

var n = $("#mydiv").text().length;
if (n < 5){
      //do something
  }

But 'n' seems to be counting the code used for the div it self:

<div id="mydiv">

</div>

So even if there are no characters within the div: n = 23.

Does anyone know a way to adjust this to only count characters within the div itself?

解决方案

Trim the text to exclude the leading and trailing spaces in the text

var n = $.trim($("#mydiv").text()).length; //use String.trim() if you want to support IE9+

Demo: Fiddle

• $.trim()
• String.trim()

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