Uncaught TypeError: Cannot read property 'load' of undefined

i have a proble with .load() data into datatable

here my code

webix.ready(function() {
$$(“tabel_barang”).load(“crud/load-data.php”);
webix.ui({
“rows”: [{
“cols”: [
formData,
dataTabels
]
},
{
“view”: “template”,
“template”: "Footer ",
“role”: “placeholder”,
“height”: 50
}
]
});
});

@taufiqi
$$("tabel_barang").load("crud/load-data.php");
use this command after webix.ui
in your case table is not created yet when referencing