I have just started working with JavaScript and do not understand much about it. I need help with outputting a variable for a promise, but when I output it it gets undefined. I need to put this variable in the message for the telegram bot, when I put it there, I get: [object Promise]
import fetch from 'node-fetch';
const dataTransfer = fetch('https://bank.gov.ua/NBUStatService/v1/statdirectory/exchange?json')
.then(currencyEx => currencyEx.json())
.then(data => data[0].exchangedate);
console.log(dataTransfer.data);
I get the answer: undefined
function start() {
function curData(chatId) {
return bot.sendMessage(chatId, `Current data: ${dataTransfer.data}`);
}
bot.on('message', msg => {
const text = msg.text;
const chatId = msg.chat.id;
if (text === '/data') {
return curData(chatId);
}
return bot.sendMessage(chatId, 'idk');
});
}
This is the telegram bot code, the response to the message / data = Current data: [object Promise]
Fetch returns a promise so const dataTransfer = fetch('') returns a promise, unless you await for it.
What will work is:
import fetch from 'node-fetch';
const fetchData = async () => {
const resp = await fetch('https://bank.gov.ua/NBUStatService/v1/statdirectory/exchange?json')
const dataTransfer = await resp.json();
console.log(dataTransfer);
}
fetchData()