React upload multiple files (2024)

FAQs

How to upload multiple files in ReactJS? ›

append() method to wrap all the files into one single entity that is sent via a fetch request. If you want to dive more into the FormData interface I've written two articles about it: a basic intro for fetch() and FormData. and one that goes more into details about FormData and the append() method.

Uploading large files in a React application, using AWS S3 pre-signed URLs, provides a secure and efficient way to handle file transfers. By offloading the actual file transfer to AWS S3, you reduce the load on your server, and by using pre-signed URLs, you maintain a high level of security.

When present, it specifies that the user is allowed to enter more than one value in the <input> element. Note: The multiple attribute works with the following input types: email, and file. Tip: For <input type="file"> : To select multiple files, hold down the CTRL or SHIFT key while selecting.

In simpler words, this technique means to only render the list items required to fill in the entire page length, and then add more items as the user scrolls down. We can implement this using the react-infinite-scroller library. Here's the implementation of the same 10,000-item list using react-infinite-scroller.

Importing data from a CSV file into a React. js application is straightforward with the help of the papaparse library. By creating a reusable CsvFileInput component and managing the data state in the parent App component, we can easily handle CSV file uploads and display the imported data.

How to upload a PDF file in React? ›

To upload a PDF file in React, you can create a file input element and handle the file upload in React component using state. Then, you can send the selected file to your server or API for processing, or you can display the PDF in the browser by using a third-party library like react-pdf.

To upload image and preview it using React JS we will use the HTML file input for the image input. After taking input the image url is created using URL. createObjectURL() method and store in the useState variable named file. Display the image as preview using the html img tags with the file url in the src prop.

React Dropzone can be easily configured to accept multiple file uploads. This is done by setting the multiple prop to true in the getInputProps function. This allows users to select more than one file at a time from the file dialog or to drag and drop multiple files into the dropzone.

The file manager allows you to select multiple files by enabling the allowMultiSelection property (enabled by default). The multiple selection can be done by pressing the Ctrl key or Shift key and selecting the files.