segue a importação dos scripts no index.html
<script src="js/models/Negociacao.js"></script>
<script src="js/controllers/NegociacaoController.js"></script>
<script src="js/models/Negociacoes.js"></script>
<script src="js/views/NegociacoesView.js"></script>
<script src="js/app.js"></script>e o NegociacoesView.ts
lass NegociacoesView {
template(): string {
return `
<table class="table table-hover table-bordered">
<thead>
<tr>
<th>DATA</th>
<th>QUANTIDADE</th>
<th>VALOR</th>
<th>VOLUME</th>
</tr>
</thead>
<tbody>
</tbody>
<tfoot>
</tfoot>
</table>
`;
}
}