How to upload and preview images in React.JS (2024)

FAQs

How to upload and preview images in React.JS? ›

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.

The enctype property being set to " multipart/form-data " enables the <input> elements to actually upload file data, the multiple attribute on the <input type="file"> element enables multi-file selection, and optionally, setting the accept property to “image/*” and “video/*” lets the user only upload files of those ...

Right-click (or Ctrl-click) one of the highlighted files and select Open With -> Preview in the contextual dropdown menu. In Preview's sidebar, drag the thumbnail images into the order that you want them to appear in the PDF document.

To enable image preview before upload in web development, utilize JavaScript's FileReader class. Start by creating an HTML file input element and an image element for displaying the preview, with appropriate IDs. Then, create a JavaScript function triggered by the file input's value change.

Displaying an Image in ReactJS

In HTML, we use the <img> tag to display an image. The source of the image is defined with the src attribute. In React, we use the same <img> tag, and we can set the src attribute to a URL just like we would in HTML.

The src folder is the main folder for your React application. This is where you will put all of your JavaScript files, as well as any other assets that you want to be bundled up with your application. You can also put images in the src folder.

The file uploader was customized so that it allows the section of multiple files and it takes only images as inputs. You can use the multiple and accept attributes to change these behaviors. As a final note, you can use the URL. createObjectURL() to make image previews for the uploaded files.

How do I display an image in ReactJS? ›

Displaying an Image in ReactJS

In HTML, we use the <img> tag to display an image. The source of the image is defined with the src attribute. In React, we use the same <img> tag, and we can set the src attribute to a URL just like we would in HTML.

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.