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Learn how to create a simple web form that fetches API data dynamically using user input. Follow this guide to build a coronavirus tracker effectively.
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How to Easily Fetch API Data Based on User Input in JavaScript

Creating a web application where users can retrieve data based on their input is a fundamental skill for any developer. Recently, a question was raised about building a coronavirus tracker where users can input their country's name to gather statistics via an API. If you've ever wondered how to implement this using JavaScript and jQuery, you're in the right place! In this post, we'll walk through a straightforward solution for fetching API data in response to user input.

Understanding the Problem

The goal is to enable users to type in a country name into a search box, which triggers the fetching of data from an external API (in this case, the COVID-19 API). After the user submits their input, the application should display the relevant data on the webpage.

This may seem daunting at first, but with the right approach and some basic knowledge of JavaScript, HTML, and CSS, you can easily set this up.

Solution Overview

The proposed solution involves a simple HTML form that accepts country names and a JavaScript function to handle the API request. Here’s a breakdown of the process:

1. HTML Form Setup

First, we need an HTML form where users can enter their desired country name. Here's a simplified example:

[[See Video to Reveal this Text or Code Snippet]]

In this code:

A search box (input) allows users to enter the country's name.

A search button submits the form.

A textarea displays the results returned from the API.

2. Styling with CSS

You may want to add some basic CSS to improve the user interface. Here’s a simple style you can use:

[[See Video to Reveal this Text or Code Snippet]]

3. JavaScript Function to Fetch the API

Now it's time to write the JavaScript function that will fetch data from the API. This function will be triggered when the user submits the form.

[[See Video to Reveal this Text or Code Snippet]]

Explanation of the JavaScript Code

Fetch Input Value: This extracts the user's input from the search box.

Validation Check: It checks if the input is empty and prompts the user to enter a country.

API Request: Using the fetch method, it connects to the API with the constructed URL based on user input.

Data Handling: Upon receiving the data, it formats and displays it in the textarea.

Error Handling: If any errors occur during the fetch or data processing, the application alerts the user.

Conclusion

With this simple setup, you can now allow users to fetch live COVID-19 data based on their country input efficiently. This example can be expanded and styled further as per your requirements. By understanding how to handle user inputs and API requests, you're well on your way to enhancing your web development skills.

Happy coding! If you have any questions or need further clarification, feel free to ask!