Hallo,
ich versuche gerade 'var waeh' in ein Object-literal umzuformen und das
'fetch' so zu formulieren das es dies aufnimmt. Leider funktioniert es aber
nicht und ich weiss nicht was ich tun kann.
Code
var waeh = {
'CHF': 1.34,
'USD': 1.23,
'EUR': 1.45
};
const from_currencyEl=document.getElementById('from_currency');
const to_currencyEl=document.getElementById('to_currency');
const from_ammountEl = document.getElementById('from_ammount');
const to_ammountEl = document.getElementById('to_ammount');
const rateEl = document.getElementById('rate');
const exchange = document.getElementById('exchange');
for(x=0;x<waeh.length;x++){
op=document.createElement('option');
op.value=waeh[x];
op.innerHTML=waeh[x];
from_currencyEl.append(op)
}
to_currencyEl.innerHTML=from_currencyEl.innerHTML;
from_currencyEl.addEventListener('change', calculate);
from_ammountEl.addEventListener('input', calculate);
to_currencyEl.addEventListener('change', calculate);
to_ammountEl.addEventListener('input', calculate);
exchange.addEventListener('click', () => {
const temp = from_currencyEl.value;
from_currencyEl.value = to_currencyEl.value;
to_currencyEl.value = temp;
calculate();
});
function calculate() {
const from_currency = from_currencyEl.value;
const to_currency = to_currencyEl.value;
fetch(`waeh${from_currency}`)
.then(res => res.json())
.then(res => {
const rate = res.rates[to_currency];
rateEl.innerText = `1 ${from_currency} = ${rate} ${to_currency}`
to_ammountEl.value = (from_ammountEl.value * rate).toFixed(2);
})
}
calculate();