How to hide/show more text within a certain length (like youtube)

Question

I want to have a text to only be a certain amount of characters/length and after that length, I want to put a link to reveal the full length of the text.

The link w

Answer 1

So much answers and all them good, but I will suggest my own, maybe it will be usefull for somebody.

We have HTML in the template:

<div class="listing-item-excerpt" id="listing-item-excerpt-<?= $task['id'] ?>">
    <?= mb_substr($txt, 0, 150) ?><span class="complete_txt"><?= mb_substr($txt, 150) ?></span>
    <a href="javascript: show_more_less(<?= $task['id'] ?>);void(0);" class="more_less_btn" data-more-txt="<?= __('... show more') ?>" data-less-txt="&nbsp;<?= __('show less') ?>" data-state="0"><?= __('... show more') ?></a>
</div>

JS function for toggling which:

function show_more_less(task_id) {

    var btn = jQuery('#listing-item-excerpt-' + task_id).find('.more_less_btn');
    var txt_container = jQuery('#listing-item-excerpt-' + task_id).find('.complete_txt');
    var state = parseInt(jQuery(btn).data('state'), 10);
    if (state === 0) {
        jQuery(txt_container).show();
        jQuery(btn).text(jQuery(btn).data('less-txt'));
        jQuery(btn).data('state', 1);
    } else {
        jQuery(txt_container).hide();
        jQuery(btn).text(jQuery(btn).data('more-txt'));
        jQuery(btn).data('state', 0);
    }
}

Answer 2

You can use like this

$(".jsgrid-cell").each(function(i,v){
    var txt=$(v).text();
    if(txt.length>100){
        var shortText=txt.substring(0, 100)+
        "<span onclick='$(this).hide();$(this).next().toggle();'>"+
            "..."+
        "</span>"+
        "<span  style='display:none'>"+
            txt.substring(100, txt.length)+
        "</span>";

        $(v).html(shortText );
    }
});

Answer 3

Put text inside Your Text Here and copy the script inside your js file. You are ready to go. Working code for see more.. and see less.. options. Works for dynamic as well as static texts

<div class="item">
  Your Text Here
</div>

<script type="text/javascript">
 $(function(){ /* to make sure the script runs after page load */

    $('.item').each(function(event){ /* select all divs with the item class */

      var max_length = 150; /* set the max content length before a read more link will be added */

      if($(this).html().length > max_length){ /* check for content length */

        var short_content   = $(this).html().substr(0,max_length); /* split the content in two parts */
        var long_content  = $(this).html().substr(max_length);

        $(this).html(short_content+'<a href="#" class="read_more">Show More</a>'+
               '<span class="more_text" style="display:none;">'+long_content+'</span>'+'<a href="#" class="read_less" style="display:none;">Show Less</a>'); /* Alter the html to allow the read more functionality */

        $(this).find('a.read_more').click(function(event){ /* find the a.read_more element within the new html and bind the following code to it */

          event.preventDefault(); /* prevent the a from changing the url */
          $(this).hide(); /* hide the read more button */
          $('.read_less').show(); /* show read less button */

          $(this).parents('.item').find('.more_text').show(); /* show the .more_text span */

        });

        $(this).find('a.read_less').click(function(event){ 
          event.preventDefault();

          $(this).hide(); /* hide the read more button */
          $('.read_less').hide();
          $('.read_more').show();

          $(this).parents('.item').find('.more_text').hide();

        });

      }

    });


  });
</script>

Answer 4

Updated @Hussein solution with preview height that will adapt to the paragraph number of lines.

So with this bit of code : - You can choose the number of lines you want to show in preview, it will works for all screen sizes, even if font-size is responsive. - There is no need to add classes or back-end editing to separate preview from whole content.

http://jsfiddle.net/7Vv8u/5816/

var h = $('div')[0].scrollHeight;

divLineHeight = parseInt($('div').css('line-height'));
divPaddingTop = parseInt($('div').css('padding-top'));
lineToShow = 2;
divPreviewHeight = divLineHeight*lineToShow - divPaddingTop;
$('div').css('height', divPreviewHeight );

$('#more').click(function(e) {
  e.stopPropagation();
  $('div').animate({
    'height': h
  })
});

$(document).click(function() {
  $('div').animate({
    'height': divPreviewHeight
  })
})

Answer 5

Another possible solution that we can use 2 HTML element to store brief and complete text. Hence we can show/hide appropriate HTML element :-)

<p class="content_description" id="brief_description" style="display: block;"> blah blah blah blah blah  </p><p class="content_description" id="complete_description" style="display: none;"> blah blah blah blah blah with complete text </p>

/* jQuery code to toggle both paragraph. */

(function(){
        $('#toggle_content').on(
                'click', function(){
                                $("#complete_description").toggle();
                                $("#brief_description").toggle();
                                if ($("#complete_description").css("display") == "none") {
                                    $(this).text('More...');
                                }   else{
                                    $(this).text('Less...');
                                }
                        }
                );
    })();

Answer 6

Show More, Show Less (Only when needed) No JQuery

I needed this functionality for an RSS feed on our company's website. This is what I came up with:

// Create Variables
var allOSB = [];
var mxh = '';

window.onload = function() {
  // Set Variables
  allOSB = document.getElementsByClassName("only-so-big");
  
  if (allOSB.length > 0) {
    mxh = window.getComputedStyle(allOSB[0]).getPropertyValue('max-height');
    mxh = parseInt(mxh.replace('px', ''));
    
    // Add read-more button to each OSB section
    for (var i = 0; i < allOSB.length; i++) {
      var el = document.createElement("button");
      el.innerHTML = "Read More";
      el.setAttribute("type", "button");
      el.setAttribute("class", "read-more hid");
      
      insertAfter(allOSB[i], el);
    }
  }

  // Add click function to buttons
  var readMoreButtons = document.getElementsByClassName("read-more");
  for (var i = 0; i < readMoreButtons.length; i++) {
    readMoreButtons[i].addEventListener("click", function() { 
      revealThis(this);
    }, false);
  }
  
  // Update buttons so only the needed ones show
  updateReadMore();
}
// Update on resize
window.onresize = function() {
  updateReadMore();
}

// show only the necessary read-more buttons
function updateReadMore() {
  if (allOSB.length > 0) {
    for (var i = 0; i < allOSB.length; i++) {
      if (allOSB[i].scrollHeight > mxh) {
        if (allOSB[i].hasAttribute("style")) {
          updateHeight(allOSB[i]);
        }
        allOSB[i].nextElementSibling.className = "read-more";
      } else {
        allOSB[i].nextElementSibling.className = "read-more hid";
      }
    }
  }
}

function revealThis(current) {
  var el = current.previousElementSibling;
  if (el.hasAttribute("style")) {
    current.innerHTML = "Read More";
    el.removeAttribute("style");
  } else {
    updateHeight(el);
    current.innerHTML = "Show Less";
  }
}

function updateHeight(el) {
  el.style.maxHeight = el.scrollHeight + "px";
}

// thanks to karim79 for this function
// http://stackoverflow.com/a/4793630/5667951
function insertAfter(referenceNode, newNode) {
    referenceNode.parentNode.insertBefore(newNode, referenceNode.nextSibling);
}

@import url('https://fonts.googleapis.com/css?family=Open+Sans:600');

*,
*:before,
*:after {
  box-sizing: border-box;
}
html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
  width: 100%;
}
body {
  font-family: 'Open Sans', sans-serif;
}
h1 {
  text-align: center;
}
.main-container {
  margin: 30px auto;
  max-width: 1000px;
  padding: 20px;
}
.only-so-big p {
  padding: 0;
  margin: 0;
}
p {
  font-size: 15px;
  line-height: 20px;
}
hr {
  background: #ccc;
  display: block;
  height: 1px;
  width: 100%;
}


/*
  NECESSARY SECTION
*/
.only-so-big {
  background: rgba(178, 252, 255, .3);
  height: 100%;
  max-height: 100px;
  overflow: hidden;
  -webkit-transition: max-height .75s;
  transition: max-height .75s;
}

.read-more {
  background: none;
  border: none;
  color: #1199f9;
  cursor: pointer;
  font-size: 1em;
  outline: none; 
}
.read-more:hover {
  text-decoration: underline;
}
.read-more:focus {
  outline: none;
}
.read-more::-moz-focus-inner {
  border: 0;
}
.hid {
  display: none;
}

<div class="main-container">
      <h1>Controlling Different Content Size</h1>
      <p>We're working with an RSS feed and have had issues with some being much larger than others (content wise). I only want to show the "Read More" button if it's needed.</p>
      <div class="only-so-big">
        <p>This is just a short guy. No need for the read more button.</p>
      </div>
      <hr>
      <div class="only-so-big">
        <p>This one has way too much content to show. Best be saving it for those who want to read everything in here.</p>
        <p>Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia
          voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi THE END!</p>
      </div>
      <hr>
      <div class="only-so-big">
        <p>Another small section with not a lot of content</p>
      </div>
      <hr>
      <div class="only-so-big">
        <p>Make Window smaller to show "Read More" button.<br> totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed?</p>
      </div>
    </div>