Question

My html looks like this

<input id="txt" value=""></input>

<div class="link-item">jK</div>
<div class="link-item">JFOO</div>

my js

$('#txt').keyup(function(){

    var txtsearch = $('#txt').val();
    var filt = $("div.link-item:contains('" + txtsearch +"')");

    $("div.link-item").css("display", "none")
        .filter(filt)
        .css("display", "block");

});

I’m looking to filter content dynamically on the client side. When I type a capital j, it only returns the second div whereas I want to get all div that contain j whether upper or lower case.

Answer 1

You can change the .contains filter to be case insensitive or create your own selector.

jQuery.expr[':'].icontains = function(a, i, m) {
  return jQuery(a).text().toUpperCase()
      .indexOf(m[3].toUpperCase()) >= 0;
};

This creates a new selector: icontains (or you could name it insensitive-contains, or whatever suits your fancy).
It’s usage would be the same as contains: $('div:icontains("Stack")'); would match:

<div>stack</div>
<div>Stack</div>
<div>StAcKOverflow</div>

Or override the existing .contains filter:

jQuery.expr[':'].contains = function(a, i, m) {
  return jQuery(a).text().toUpperCase()
      .indexOf(m[3].toUpperCase()) >= 0;
};

With this in place,

$("div:contains('John')");

would select all three of these elements:

<div>john</div>
<div>John</div>
<div>hey hey JOHN hey hey</div>