Replace too long strings with "..."

you could do it with css3 using text-overflow:ellipsis http://www.css3.com/css-text-overflow/

or if you insist on using the js way, you can wrap the text-node inside your div and then compare the width of the wrap with the with of the parent. 


if(text.length > number_of_characters) {
   text = text.substring(from, to);
}

If you want to process the data you can use a function:

function TextAbstract(text, length) {
    if (text == null) {
        return "";
    }
    if (text.length <= length) {
        return text;
    }
    text = text.substring(0, length);
    last = text.lastIndexOf(" ");
    text = text.substring(0, last);
    return text + "...";
}

text = "I am not the shortest string of a short lenth with all these cows in here cows cows cows cows";

alert(TextAbstract(text,20));

EDIT: process all div with excess length in the text:

    var maxlengthwanted=20;

    $('div').each(function(){
        if ($('div').text().length > maxlengthwanted)
            $(this).text(TextAbstract($(this).text()));
    });

EDIT: More compact version to process all div with excess length in the text, breaks on space.

function textAbstract(el, maxlength = 20, delimiter = " ") {
  let txt = $(el).text();
  if (el == null) {
    return "";
  }
  if (txt.length <= maxlength) {
    return txt;
  }
  let t = txt.substring(0, maxlength);
  let re = /\s+\S*$/;
  let m = re.exec(t);
  t = t.substring(0, m.index);
  return t + "...";
}

var maxlengthwanted = 23;

$('.makeshort').each(function(index, element) {
  $(element).text(textAbstract(element, maxlengthwanted, " "));
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div class="makeshort">This is a fun thing to process, modification of this is going to just be soo much fun</div>
<div class="makeshort">second This is a fun thing to process, modification of this is going to just be soo much fun</div>
<div class="makeshort">IBShort Wilson</div>
<div class="makeshort">another This is a fun thing to process, modification of this is going to just be soo much fun</div>
<div class="makeshort">more This is a fun thing to process, modification of this is going to just be soo much fun</div>
<span class="makeshort">Me also, a span that is a fun thing to process, modification of this is going to just be soo much fun</span>
<span class="makeshort">more This is a fun thing to process, modification of this is going to just be soo much fun</span>
<ul>
  <li class="makeshort">li1 more This is a fun thing to process, modification of this is going to just be soo much fun</li>
  <li class="makeshort">li 2 more This&#10;is a&#10;fun thing to process, modification of this is going to just be soo much fun</li>
  <li class="makeshort">li 3 also more&#20;This&#09;is&#09;a fun thing to process, modification of this is going to just be soo much fun</li>
  <li class="makeshort">li 4 also more This&nbsp;is&nbsp;fun thing to process, modification of this is going to just be soo much fun</li>
</ul>

Tags:

Javascript

Html

Jquery

Jsp

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