How to get data from a public API and display that on the webpage?

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How do I get phone number details from a public API and display that on the webpage when I enter any number into the search box? Can you provide the general code?

What I have tried:

JavaScript

//button with id myBtn
let myBtn = document.getElementById("myBtn");

//div with id content
let content = document.getElementById("content");

/* function getData() {
  fetch("http://apilayer.net/api/validate")
    .then(res => return res.json();)
    .then((data) => {
      console.log(data);
    });
}
console.log(getData()); */

fetch("http://apilayer.net/api/validate")
  .then((res) => res.json())
  .then((data) => console.log(data));

Posted 22-Jun-21 17:31pm

Sharjeel Faiq

Updated 22-Jun-21 22:27pm

Chris Copeland

v2

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Chris Copeland · Answer 1 · 2021-06-22T22:27:00

If you're planning on making an API call using fetch() then you probably intend on sending the value across to the API. At the moment you're performing a simple GET request with no additional input, so that's probably not going to work.

You can use the fetch() document[^] as a starting point for what you're trying to accomplish. We're not going to build the code for you, but you have a good starting point with what you've already tried. You need to work out whether the API is expecting a JSON (application/json) request or a form (application/x-www-form-urlencoded).

JavaScript

// Sending a request as JSON
fetch('https://api.domain/path', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    phoneNumber: document.getElementById('..').value
  })
})
  .then(..)
  .catch(..)

// Sending a request as a form
const form = new FormData();
form.append('phoneNumber', document.getElementById('..').value);

fetch('https://api.domain/path', {
  method: 'POST',
  body: form
})
  .then(..)
  .catch(..)