I created a simple file uploading application with loopbackjs. In the application\'s client side I used simple HTML and Javascript code, calling a loopback api with an AJAX
You can upload files/Images using loopback's default storage component. Go to the doc link and follow the instruction and specially look how the example project implemented the file uploading.
You will have to create a datasource and a container model for this purpose.
Create Datasource:
$ lb datasource
[?] Enter the data-source name: myfilesystem
[?] Select the connector for myfilesystem: other
[?] Enter the connector name: loopback-component-storage
[?] Install storage (Y/n)
create the container model: