Next.js is a popular framework for building server-side rendered React applications. With the release of Next.js 12, it has become even more powerful and user-friendly. One of the new features in Next.js 12 is the ability to download multiple files of the same extension with ease. In this article, we will explore how to do that.
Downloading multiple files of the same extension can be useful in various scenarios. For example, you may want to download multiple images or documents from a server at once. Next.js 12 provides a simple and efficient way to achieve this.
To download multiple files of the same extension in Next.js 12, you can use the built-in fetch() function along with the Promise.all() method. Here's an example:
fetchMultipleFiles = async (fileUrls) => {
const filePromises = fileUrls.map((url) => fetch(url));
const files = await Promise.all(filePromises);
files.forEach((file, index) => {
const fileName = `file${index + 1}.${fileUrls[index].split('.').pop()}`;
const url = URL.createObjectURL(file.blob());
const link = document.createElement('a');
link.href = url;
link.download = fileName;
link.click();
});
}
In the above code snippet, we define a function called fetchMultipleFiles which takes an array of file URLs as an argument. We then use the map() method to create an array of promises, where each promise represents a fetch request to download a file from the provided URL.
Next, we use the Promise.all() method to wait for all the promises to resolve. This ensures that all the files are downloaded before further processing.
Once all the files are downloaded, we iterate over the array of files using the forEach() method. For each file, we generate a unique file name by appending the index and the file extension. We then create a temporary URL for the file using the URL.createObjectURL() method.
We create a new <a> element and set its href attribute to the temporary URL. We also set the download attribute to the generated file name. Finally, we trigger a click event on the link using the click() method, which initiates the file download.
With this code in place, you can now call the fetchMultipleFiles function and pass an array of file URLs to download multiple files of the same extension in Next.js 12.
Here's an example usage:
const fileUrls = [
'https://example.com/file1.jpg',
'https://example.com/file2.jpg',
'https://example.com/file3.jpg'
];
fetchMultipleFiles(fileUrls);
In the above example, we pass an array of three image URLs to the fetchMultipleFiles function. This will download all three images to the user's device.
That's it! You now know how to download multiple files of the same extension in Next.js 12. This feature can be handy when dealing with bulk downloads or when you need to provide a download option for multiple files on your website.
References
| Link | Description |
|---|---|
| Next.js Documentation | Official documentation for Next.js. |
| Fetch API - MDN Web Docs | Learn more about the Fetch API used for making network requests. |
| Promise.all() - MDN Web Docs | Explore the Promise.all() method for handling multiple promises. |
| URL.createObjectURL() - MDN Web Docs | Learn how to create temporary URLs for files using the URL.createObjectURL() method. |