JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" id="edit_search" onkeyup="find_my_div();">
<input type="button" onClick="find_my_div();" value="Find">
<div id="user_0" class="name" style="display:none">Andy Daulton
    <br/>Owner Nissan
    <br/>
    <br/>
</div>
<div id="user_1" class="name" style="display:none">Doug Guy
    <br/>Bug Collector
    <br/>
    <br/>
</div>
<div id="user_2" class="name" style="display:none">Sam Hilton
    <br/>Famous Celebrity in Hollywood
    <br/>
    <br/>
</div>
<div id="user_3" class="name" style="display:none">Don Grey
    <br/>Old man
    <br/>
    <br/>
</div>
<div id="user_4" class="name" style="display:none">Amy Hinterly
    <br/>Cook
    <br/>
    <br/>
</div>
<div id="user_5" class="name" style="display:none">Gary Doll
    <br/>Racecar Driver
    <br/>
    <br/>
</div>
<div id="user_6" class="name" style="display:none">Tod Akers
    <br/>Football Player
    <br/>
    <br/>
</div>
<div id="user_7" class="name" style="display:none">Greg Barkley
    <br/>Interior designer
    <br/>
    <br/>
</div>
<div id="user_8" class="name" style="display:none">Alen Simmons
    <br/>8th place winner
    <br/>
    <br/>
</div>

JavaScript

function gid(a_id) {
    return document.getElementById(a_id);
}

function close_all() {

    for (i = 0; i < 999; i++) {
        var o = gid("user_" + i);
        if (o) {
            o.style.display = "none";
        }
    }

}


function find_my_div() {
    close_all();

    var o_edit = gid("edit_search");
    var str_needle = edit_search.value;
    str_needle = str_needle.toUpperCase();
    var searchStrings = str_needle.split(/\W/);

    for (var i = 0, len = searchStrings.length; i < len; i++) {
        var currentSearch = searchStrings[i].toUpperCase();
        if (currentSearch !== "") {
            nameDivs = document.getElementsByClassName("name");
            for (var j = 0, divsLen = nameDivs.length; j < divsLen; j++) {
                if (nameDivs[j].textContent.toUpperCase().indexOf(currentSearch) !== -1) {
                    nameDivs[j].style.display = "block";
                }
            }
        }
    }
}