JSFiddle - React, Tailwind, and code Playground

HTML

<div id="myDiv2" class="myClass"/>
<div id="mYDIV" class="myClass"/>

JavaScript

function selectorCaseInsensitive(selector, attribute, value) {
    result = new Array();
    count = 0;
    my_search = new RegExp('^'+value,'i'); // 'i' makes the regexp case insensitive
    $(selector).each(function(){
        if ($(this).attr(attribute).match(my_search) != null) {
            result[count++] = $(this);
            document.write($(this).attr(attribute)+'</br>');
        }
    });
    return result;
}

selectorCaseInsensitive('.myClass', 'id', 'myDiv');