var controls_string = '{!!json_encode($controls, JSON_HEX_APOS) ?? ""!!}';
controls_string = controls_string.replace(/[\u0000-\u0019]+/g,"");
var controls = JSON.parse(controls_string);

var controls = JSON.parse('{!!json_encode($controls, JSON_HEX_APOS) ?? ""!!}'.replace(/[\u0000-\u0019]+/g,""));