loop.js

for (let index = 0; index < data.length; index++) {
                for (let i = 0; i < data[index].packages.length; i++) {
                    for (let x = 0; x < data[index].packages[i].availabel_packages.length; x++) {

                        detail_locate(data[index].packages[i].availabel_packages[x].id_dest)
                            .then(detail_lok=>{
                                let images
                                images = detail_lok[0].image
                                if(detail_lok[0].image.length == 0)
                                    images = [{"number_image": "-","_id": "-","link": "-"}]
                                data[index].packages[i].availabel_packages[x].nama = detail_lok[0].nama
                                data[index].packages[i].availabel_packages[x].link_gambar = images
                                if (data.length-1 == index && data[index].packages.length-1 == i && data[index].packages[i].availabel_packages.length-1 == x) {
                                    resolve(data)
                                }
                            })

                    }
                }

            }