Problem with JSON filter and Array

Question

I’m trying to filter a JSON with category but I’m not getting it.

I have 3 checkbox and when I select them I should filter a json as selected. and when unchecking a checkbox should filter only those that are selected. If no checkbox is selected it should return empty [].

And when I select a checkbox and uncheck it returns only []. Follow the code on Jsfiddle

Answer 1

Assuming that it is necessary to filter the stretches that contain the flight of the selected company, it could simplify the filter to check if there are flights in the stretches that are selected:

function filtro(valor, selecionado) {

    json.aPesquisa.forEach(function(item) {

        if (selecionado) {
            item.trecho.forEach(function(trecho) {
                trecho.voo.forEach(function(voo) {
                    if (voo.cia.nm == valor) {
                        categoriaList.push(voo);
                    }
                })
            })
        }
    })

    $("#resultado").html(JSON.stringify(categoriaList));
}

Jsfiddle: https://jsfiddle.net/lbclucascosta/xrkuoqhq/84/