Restrict the amount of JSON data returned within an array

Question

Restrict the amount of JSON data returned within an array

My script fetches JSON data and extracts a list of actors stored in an array called 'cast'. To display the first actor from this list, I use the following JavaScript...

let movieCredits = document.getElementById("movieCredits");
movieCredits.innerHTML = out.credits.cast[0].name;

The actor information is then shown in a div like so...

<div id="movieCredits"></div>

I want to display the first 5 results instead of just the first one. Is there an easy way to achieve this?

javascript json

Answer 1

Answer №1

To extract the first 5 elements from an array, you can use the Array.slice method:

const initialFive = myArray.slice(0, 5)

After that, you have the option to generate HTML content based on your specific requirements. For example:

const itemsList = initialFive.map(element => `<li>${element}</li>`);
document.getElementById("output").innerHTML = `<ul>${itemsList}</ul>`;

Answer 2

To extract the first 5 elements from an array, you can use the Array.slice method:

const initialFive = myArray.slice(0, 5)

After that, you have the option to generate HTML content based on your specific requirements. For example:

const itemsList = initialFive.map(element => `<li>${element}</li>`);
document.getElementById("output").innerHTML = `<ul>${itemsList}</ul>`;

Answer 3

Answer №2

Your current code is only referencing the first element in your array, but you need to access the first 5 elements. Also, by setting innerHTML within a loop, you are constantly overwriting it. To solve this issue, you can either build a string of innerHTML as you loop and then write it at once, or create new HTML elements and append them as children to your target div like I've demonstrated in the example below.

function populateCast() {
  
  var out = {};
  out.credits = {};
  out.credits.cast = [{
      name: 'actor_one'
    },
    {
      name: 'actor_two'
    },
    {
      name: 'actor_three'
    },
    {
      name: 'actor_four'
    },
    {
      name: 'actor_five'
    },
    {
      name: 'actor_six'
    },
    {
      name: 'actor_seven'
    }
  ];

  for (var i = 0; i < 5; i++) {
    var element = document.createElement("p");
    element.innerHTML = out.credits.cast[i].name;
    var target = document.getElementById('movieCredits');
    target.appendChild(element);
  }
}

<html>

<body>
  <div id="movieCredits"></div>
  <button id="castPopulate" onClick="populateCast()">Populate Cast</button>
</body>

</html>

Answer 4

Your current code is only referencing the first element in your array, but you need to access the first 5 elements. Also, by setting innerHTML within a loop, you are constantly overwriting it. To solve this issue, you can either build a string of innerHTML as you loop and then write it at once, or create new HTML elements and append them as children to your target div like I've demonstrated in the example below.

function populateCast() {
  
  var out = {};
  out.credits = {};
  out.credits.cast = [{
      name: 'actor_one'
    },
    {
      name: 'actor_two'
    },
    {
      name: 'actor_three'
    },
    {
      name: 'actor_four'
    },
    {
      name: 'actor_five'
    },
    {
      name: 'actor_six'
    },
    {
      name: 'actor_seven'
    }
  ];

  for (var i = 0; i < 5; i++) {
    var element = document.createElement("p");
    element.innerHTML = out.credits.cast[i].name;
    var target = document.getElementById('movieCredits');
    target.appendChild(element);
  }
}

<html>

<body>
  <div id="movieCredits"></div>
  <button id="castPopulate" onClick="populateCast()">Populate Cast</button>
</body>

</html>

Restrict the amount of JSON data returned within an array

Answer №1

Answer №2

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