Как устанавливать своё значение строки json если она не найдена?

Question

[egorlisss]

axios.get(`https://api.vk.com/method/wall.get?owner_id=-182911711&count=1&extended=1&access_token=токен&v=5.60`).then(res => {
    return res.data;
}).then(data => {
    let text = data.response.items[0].text;
    let time = data.response.items[0].date;
    let attachments = data.response.items[0].attachments[0].type;
    if (news.news == time) {
        console.log(`Новых новостей нет!`)
    } else {
        if (attachments == "photo") {
            const msg = new webhook.MessageBuilder()
                .setName("Steve")
                .setColor("#aabbcc")
                .addField(data.response.groups[0].name, text)
                .setImage(data.response.items[0].attachments[0].photo.photo_1280)
                .setTime();
            Hook.send(msg);
            news.news = `${time}`
        } else {
            const msg = new webhook.MessageBuilder()
                .setName("Steve")
                .setColor("#aabbcc")
                .addField(data.response.groups[0].name, text)
                .setTime();
            Hook.send(msg);
        }
    }
}).catch(err => console.log(err));

В ответе json data.response.items[0].attachments[0].type может не существовать и код не будет выполнятся дальше

let attachments = data.response.items[0].attachments[0].type;

, необходимо если data.response.items[0].attachments[0].type; = undefindet устанавливать значение для него 0

Answer 1

[Дмитрий Гололобов]

let attachments = '';

if(data.response.items[0].attachments[0].type === undefined) {
    attachments = 0;
} else {
 attachments = data.response.items[0].attachments[0].type;
}

или

let attachments = (data.response.items[0].attachments[0].type === undefined) ? 0 : data.response.items[0].attachments[0].type;

Comments

[egorlisss]

let attachments = (data.response.items[0].attachments === undefined) ? 0 : data.response.items[0].attachments[0].type;