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JSONP and AJAX API search fail

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Apr 04.2023
<!DOCTYPE html>
<html lang="en">

 <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <title>Uppgift 3</title>

 <!-- Bootstrap -->
 <link rel="stylesheet" href="styles/bootstrap.min.css">
 <link rel="stylesheet" href="styles/style.css" />

 <nav class="navbar navbar-inverse navbar-fixed-top">
 <div class="container">
 <div class="navbar-header">
 <a class="navbar-brand" href="#">Uppgift 3</a>

 <div class="container">

 <div class="search-template">
 <h1>Sökning av livsmedel</h1>

 <form class="form">
 <div class="form-group">
 <label for="search-word">Livsmedel</label>
 <input type="search" class="form-control" id="search-word" placeholder="t ex makaroner">
 <button type="submit" class="btn btn-default" id="sok-button">Sök</button>
 <table id="search-table" class="table">
 <th>Energi (kcal/100g)</th>


 <!-- /.container -->

 <script src="scripts/jquery-3.3.1.min.js"></script>
 <script src="scripts/bootstrap.min.js"></script>
 <script src="scripts/getLivsmedelsData.js"></script>

function getLivsmedelsData(data) {
 const tableBody = document.getElementById("search-table").getElementsByTagName("tbody")[0];
 tableBody.innerHTML = ""; // Clear the table body
 if (data.livsmedel.length> 0) {
 data.livsmedel.forEach(item => {
 const row = tableBody.insertRow();
 const nameCell = row.insertCell();
 const energyCell = row.insertCell();
 const carbsCell = row.insertCell();
 const proteinCell = row.insertCell();
 const fatCell = row.insertCell();
 nameCell.textContent = item.namn;
 energyCell.textContent = item.energi;
 carbsCell.textContent = item.kolhydrater;
 proteinCell.textContent = item.protein;
 fatCell.textContent = item.fett;
 } else {
 document.getElementById("search-table").style.display = "none";
 document.getElementById("sok-button").addEventListener("click", (e) => {
 const searchTerm = document.getElementById("search-word").value.trim();
 if (searchTerm) {
 const script = document.createElement("script");
 script.src = <span><code>https://webservice.informatik.umu.se/webservice_livsmedel/getlivsmedel.php?namn=${encodeURIComponent(searchTerm)}&callback=getLivsmedel</code></span>;
 } else {
 alert("Please enter a search term.");

When the user clicks on the “Search button”, a search must be made against a food web service using so-called JSONP.

The search result should be presented as rows in the table found in index.html . Use the tbody element inside the table to hold your rows.

The result must consist of food names, energy and the distribution of carbohydrates, protein and fat, be ware of the orders.

  • When a new search is made, the result from the previous search must be deleted.
  • If the search results in zero hits, the table should not be displayed. In other words, the table header should not appear alone on the page.
  • If the search results in one or more hits, the table must be visible and show the result. The following image shows what a result might look like: 

food data must take place from a web service available at this URL:


If we are looking for “bacon” the website is


Can anyone help me? I pressed the button, nothing happens. I got a empty list with a table head.

Need help with codes. This is completely new for me.

Please help me.

I tried this

script.src = <span><code>https://webservice.informatik.umu.se/webservice_livsmedel/getlivsmedel.php?namn=${encodeURIComponent(searchTerm)}&amp;amp;callback=getLivsmedelsData</code></span>;


Uncaught SyntaxError: Unexpected token ‘<‘ (at getLivsmedelsData.js:31:16)

I tried this

script.src = `https://webservice.informatik.umu.se/webservice_livsmedel/getlivsmedel.php?namn=${encodeURIComponent(searchTerm)}&callback=getLivsmedelData`;

And I get this faiölure (Webbrowser console windows)

Uncaught ReferenceError: getLivsmedelData is not defined

at https://webservice.informatik.umu.se/webservice_livsmedel/getlivsmedel.php?namn=${encodeURIComponent(searchTerm)}&callback=getLivsmedelData:1:1

(anonymous) @ getlivsmedel.php?


to post a answer

1 Replies

Davinci•003 auto-replyJSONP and AJAX API search failures can be caused by a variety of issues. The most common issue is that the API is not configured correctly. For example, if the API is not set up to accept cross-domain requests, then the search will fail. Additionally, if the API is not properly configured to handle the data type being sent, then the search will fail. Finally, if the API is not properly configured to handle the parameters being sent, then the search will fail.

To troubleshoot the issue, you should first check the API documentation to ensure that it is properly configured. Additionally, you can use a tool like Postman to test the API and ensure that it is returning the expected results. If the API is configured correctly, then you should check the code that is making the request to ensure that it is sending the correct parameters and data types.

// Example of a JSONP request
url: 'https://example.com/api',
dataType: 'jsonp',
data: {
param1: 'value1',
param2: 'value2'
success: function(data) {
// Handle the response

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