Is there a case insensitive version of the :contains jQuery selector or should I do the work manually by looping over all elements and comparing their .text() to my string?<
If someone (like me) is interested what do a and m[3] mean in Contains definition.
KEY/LEGEND: Params made available by jQuery for use in the selector definitions:
r = jQuery array of elements being scrutinised. (eg: r.length = Number of elements)
i = index of element currently under scrutiny, within array r.
a = element currently under scrutiny. Selector statement must return true to include it in its matched results.
m[2] = nodeName or * that we a looking for (left of colon).
m[3] = param passed into the :selector(param). Typically an index number, as in :nth-of-type(5), or a string, as in :color(blue).
Refer below to use ":contains" to find text ignoring its case sensitivity from an HTML code,
$.expr[":"].contains = $.expr.createPseudo(function(arg) {
return function( elem ) {
return $(elem).text().toUpperCase().indexOf(arg.toUpperCase()) >= 0;
};
});
$("#searchTextBox").keypress(function() {
if($("#searchTextBox").val().length > 0){
$(".rows").css("display","none");
var userSerarchField = $("#searchTextBox").val();
$(".rows:contains('"+ userSerarchField +"')").css("display","block");
} else {
$(".rows").css("display","block");
}
});
You can also use this link to find case ignoring code based on your jquery version, Make jQuery :contains Case-Insensitive
What I ended up doing for jQuery 1.2 is :
jQuery.extend(
jQuery.expr[':'], {
Contains : "jQuery(a).text().toUpperCase().indexOf(m[3].toUpperCase())>=0"
});
This will extend jquery to have a :Contains selector that is case insensitive, the :contains selector remains unchanged.
Edit: For jQuery 1.3 (thanks @user95227) and later you need
jQuery.expr[':'].Contains = function(a,i,m){
return jQuery(a).text().toUpperCase().indexOf(m[3].toUpperCase())>=0;
};
Edit: Apparently accessing the DOM directly by using
(a.textContent || a.innerText || "")
instead of
jQuery(a).text()
In the previous expression speeds it up considerably so try at your own risk if speed is an issue. (see @John 's question)
Latest edit: For jQuery 1.8 it should be:
jQuery.expr[":"].Contains = jQuery.expr.createPseudo(function(arg) {
return function( elem ) {
return jQuery(elem).text().toUpperCase().indexOf(arg.toUpperCase()) >= 0;
};
});
New a variable I give it name subString and put string you want to search in some elements text. Then using Jquery selector select elements you need like my example $("elementsYouNeed")
and filter by .filter()
. In the .filter()
it will compare each elements in $("elementsYouNeed")
with the function.
In the function i using .toLowerCase()
for element text also subString that can avoid case sensitive condition and check if there is a subString in it. After that the .filter()
method constructs a new jQuery object from a subset of the matching elements.
Now you can get the match elements in matchObjects and do whatever you want.
var subString ="string you want to match".toLowerCase();
var matchObjects = $("elementsYouNeed").filter(function () {return $(this).text().toLowerCase().indexOf(subString) > -1;});
As of jQuery 1.3, this method is deprecated. To get this to work it needs to be defined as a function:
jQuery.expr[':'].Contains = function(a,i,m){
return jQuery(a).text().toUpperCase().indexOf(m[3].toUpperCase())>=0;
};
A faster version using regular expressions.
$.expr[':'].icontains = function(el, i, m) { // checks for substring (case insensitive)
var search = m[3];
if (!search) return false;
var pattern = new RegExp(search, 'i');
return pattern.test($(el).text());
};