Upper case and lower case query filter

JavaScript
1

I have a search form in page. The search works correctly, but does not search for uppercase and lowercase.

How can I make a small and big letter insignificantly?

JSfiddle

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  }, t.p = "", t(t.s = 30)
}({
  30: function(e, n, t) {
    e.exports = t(31)
  },
  31: function(e, n) {
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    var r = function() {
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        ! function(e, n) {
          if (!(e instanceof n)) throw new TypeError("Cannot call a class as a function")
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      var n, r, o;
      return n = e, o = [{
        key: "iconSearch",
        value: function() {
          var e, n = jQuery(".js-icon-list > div"),
            t = "";
          jQuery(".js-form-icon-search").on("submit", function() {
            return !1
          }), jQuery(".js-icon-search").on("keyup", function(r) {
            (t = jQuery(r.currentTarget).val()).length > 2 ? (n.hide(), jQuery(".questionContent", n).each(function(n, r) {
              (e = jQuery(r)).text().match(t) && e.parent("div").parent("div").fadeIn(50)
            })) : 0 === t.length && n.show()
          })
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        value: function() {
          this.iconSearch()
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    }();
    jQuery(function() {
      r.init()
    })
  }
});
2

Did you write this, or are you copying it from somewhere else? Basically, when you do the

jQuery(r)).text().match(t)

you want to force them both to lower case:

jQuery(r)).text().toLowerCase().match(t.toLowerCase() )
3

It is quoted from a large JS file. I just changed it a little, im not the owner of the code.
thank you for your help, worked.