Filtro/Campo de Pesquisa para tabelas - JS

index.html

<input type="text" onkeyup="tableFilter(this, '#table-categories', 0);" />
<table id="table-categories">
    <thead>
        <tr>
            <th>Categoria</th>
            <th>Qntd. de Postagens</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>HTML</td>
            <td>2</td>
        </tr>
        <tr>
            <td>PHP</td>
            <td>10</td>
        </tr>
        <tr>
            <td>JS</td>
            <td>4</td>
        </tr>
        <tr>
            <td>CSS</td>
            <td>15</td>
        </tr>
    </tbody>
</table>