使用 FETCH API 显示两位小数

Question

I am making a website where it shows the different currency quotes.

I am consuming an API with FETCH. But I already tried adding.toFix (2) to it and it has not worked for me to show only two numbers after the comma.

function fetchData() {



fetch("https://www.dolarsi.com/api/api.php?type=valoresprincipales")

  .then(response => {
    return response.json();
  })
  .then(data => {
    const filteredOutput = data.filter(item => {
      switch (item.casa.nombre) {
        case "Dolar Blue":
          return item;
          break;
        default:
          return null;
      }
    })
    let html = "";
    filteredOutput.forEach(item => {

      html += "<p class= \"compra\"><small class= \"compraPrecio\">COMPRA</small><br>  $ " +item.casa.compra + "</p>";
 

    })

    document
      .querySelector('#blueCompra')
      .insertAdjacentHTML("afterbegin", html);
  });
  }
  
  fetchData(); 

This is my code to currently consume. Where should I make the arrangement? Does anyone know? Thank you!

... and my html html

Answer 1

The main issue is that the compra number is actually a String. The second issue is that it contains a ',' so it cant be simply parsed with parseInt . The solution is as follows:

1. Remove any commas from the compra string
2. Parse the string as an int
3. Format the int as a currency string

I've added comments // 1. // 2. and // 3. for the code corresoponding to the above list items

 function fetchData () { fetch("https://www.dolarsi.com/api/api.php?type=valoresprincipales").then(response => { return response.json(); }).then(data => { document.querySelector('.loading').remove() const filteredOutput = data.filter(item => { switch (item.casa.nombre) { case "Dolar Blue": return item; break; default: return null; } }) filteredOutput.forEach(item => { let compra = item.casa.compra compra = compra.replace(',', '') // 1. ⭐️ compra = parseInt(compra) // 2. ⭐️ compra = compra.toLocaleString('en-US', { minimumFractionDigits: 2 }) // 3. ⭐️ document.body.innerHTML += '<p><small>COMPRA $' + compra }) }) } fetchData()

 <span class="loading">Loading...</span>