JSFiddle - React, Tailwind, and code Playground

HTML

<table>
    
    <tr data-id="1"></tr>
    <tr data-id="3"></tr>
    <tr data-id="1"></tr>
    <tr data-id="4"></tr>
    <tr data-id="4"></tr>
    <tr data-id="7"></tr>
</table>

JavaScript

var ids = [];
var daata =[];
$("table tr").each(function(index, item) {
    ids.push($(item).data("id"));
    data.push($(item).attr("data"))
})

alert($.unique(ids));
alert($.unique(daata));