async-js/fetchAPI.html at main · asity-tech/async-js · GitHub

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<html lang="en">
  <head>
    <link rel="stylesheet" href="css/style.css" />
    <title>1</title>
  </head>
  <body>
    <main>
      <h1>fetchAPI.html</h1>
      <h1>new native fetchAPI</h1>
      <h1>console main chalo</h1>
      <div class="container">
        <a href="index.html">home</a>
        <a href="1.html">1</a>
        <a href="2.html">2</a>
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        <a href="6.html">6</a>
        <a href="7.html">7</a>
        <a href="8.html">8</a>
        <a href="asyncAwait.html">asyncAwait</a>
        <a href="fetchAPI.html">fetchAPI</a>
        <a href="placeholderAPI.html">placeholderAPI</a>
        <a href="unsplashAPI.html">unsplashAPI</a>
        <a href="weatherAPI.html">weatherAPI</a>
      </div>
    </main>
    <script>
      // this method returs a promise to us means at some point I'll either resolve if it has a success or reject if it has a failure & when a promise return like this we can tackle that using then and catch
      //   fetch("./todos/manikangkan.json");

      //   fetch("./todos/manikangkan.json")
      //     .then((response) => console.log("resolve", response))
      //     .catch((err) => console.log("rejected", err));

      // now the way fetchAPI works the promise only ever rejected when we get some kind of network error such as a 404 or 500 or something else that where we get a rejection

      // now listen carefully if we mistype the url on the end point or the resource  then we don't get a rejection instead it still get resolved and we get a response however we in the resolve if we expand  we can see we have status 404 which means basically the resource can't be found

      //   fetch("./todos/manikangkandas.json")
      //     .then((response) => console.log("resolve", response))
      //     .catch((err) => console.log("rejected", err));

      // now inorder to tackle the same we can do a if check on status
      //   here we can see we are not getting the json data directly but we are getting the response object which is a promise, if you expand response object you will get a method called json which will hold the json data and also return a promise

      fetch("./todos/manikangkan.json")
        .then((response) => {
          return response.json();
        })
        .then((data) => console.log(data))
        .catch((err) => console.log("rejected", err));
    </script>
  </body>
</html>