When the user chooses a file using the file upload dialog, an event of typeĬhange will be emitted. This is default browser behavior that can't be changed, and that is why we usually don't see this plain file input on all the interfaces that we use daily, like Gmail, etc.īecause this file input is impossible to style properly, the most common option is to actually never show it to the end-user, as we will see. Some styles applied to it can't be changed, and we can't even change the text on the button! The problem with this plain file input is that by default it's very hard to style. With this file input box, you can select a file from your file system, and then with a bit of Javascript, you can already send it to a backend. This input will allow the user to open a browser file selection dialog and select one or more files (by default, only one file). The key ingredient for uploading files in a browser is a plain HTML input of type file:
In order to build an Angular file upload component, we need to first understand how to upload files in plain HTML and Javascript only, and take it from there. So without further ado, let's get started learning how to build an Angular file upload component! How to Upload Files in a Browser
Selecting a file from the file system using a file upload dialog.Building the user interface of a file upload component.In this post, we will cover the following topics: We are going to give also an example (in Node) of how to handle the file in the backend. This custom component is going to have an upload loading indicator, and it's going to support upload cancelation as well.
We are going to learn how to build a fully functional Angular file upload component, that requires a file of a given extension to be uploaded and sends the file to a backend via an HTTP POST call. This post will cover everything that you need to know in practice in order to handle all sorts of file upload scenarios in an Angular application.