{"id":28358,"date":"2021-04-07T20:24:03","date_gmt":"2021-04-07T20:24:03","guid":{"rendered":"http:\/\/How-to-upload-images-in-Angular-with-a-Drag-and-Drop-component"},"modified":"2025-02-08T15:30:45","modified_gmt":"2025-02-08T23:30:45","slug":"how-to-upload-images-in-angular-with-a-drag-and-drop-component","status":"publish","type":"post","link":"https:\/\/cloudinary.com\/blog\/guest_post\/how-to-upload-images-in-angular-with-a-drag-and-drop-component\/","title":{"rendered":"How to upload images in Angular with a Drag & Drop component"},"content":{"rendered":"

There is no doubt that we\u2019re living in an era in which images and videos are an important part of modern web applications. For example, it is very common to find a requirement to upload images for a photo gallery, or to upload a photo for your profile.<\/p>\n

In this MediaJam<\/em>, we\u2019ll use the Angular framework, and a TypeScript-oriented solution, to create a component with the capability to upload image files from your computer from scratch.<\/p>\n

The HTML Drag and Drop API<\/h2>\n

There is an interesting specification<\/a> about the Drag and drop behavior. This has been implemented in modern browsers as part of the Web APIs<\/a>, available today.<\/p>\n

This API allows us to use JavaScript to handle the drag-and-drop features in browsers. In terms of the MDN documentation<\/a>:<\/p>\n

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The user may select draggable elements with a mouse, drag those elements to a droppable element, and drop them by releasing the mouse button. A translucent representation of the draggable elements follows the pointer during the drag operation.<\/p>\n<\/blockquote>\n

The good news about this API is the availability of several event types, which are going to be fired, and we can take control over them. Also, the API defines useful Interfaces such as DragEvent<\/code>, DataTransfer<\/code>, and others which we\u2019ll see later.<\/p>\n

The Problem<\/h2>\n

Let\u2019s suppose you\u2019re building a web application that needs to upload multiple image files. A drop-box<\/em> area should be defined so that users can drag and drop the files over it. Then, the application should display a preview section with all the images uploaded. Finally, the user can add images anytime.<\/p>\n

To clarify the idea, see the next screenshot.<\/p>\n

\"A<\/p>\n

Please note that this MediaJam<\/em> is meant to define the frontend logic to meet these requirements. At least for now, we will not transfer the image files to any external server. All of them will be processed and rendered in the browser only.<\/p>\n

The Solution<\/h2>\n

Prerequisites<\/h3>\n

You\u2019ll need to have the following tools installed in your local environment:<\/p>\n