JSFiddle - React, Tailwind, and code Playground

HTML

<table id="myTable">
    <tr style="border: 1px solid;" id="row1"><td>ololo</td></tr>
    <tr style="border: 1px solid;" id="row2"><td>ololo</td></tr>
    <tr style="border: 1px solid;" id="row3"><td>ololo</td></tr>
    <tr style="border: 1px solid;" id="row4"><td>ololo</td></tr>
    <tr style="border: 1px solid;" id="row5"><td>ololo</td></tr>
</table>
<button id="btn">click me</button>

JavaScript

var trs = [];
for (var i = 1; i <= 5; i++) {
    trs.push(document.getElementById('row'+i));
}

document.getElementById('btn').onclick = function() {
    for (var i in trs) {
        trs[i].style.cssText = '';
    }
}