Upload Image with Ajax & Laravel 5.8 & Intervention Image Library
This article helps you upload an image using Ajax and Laravel 5.7 and Intervention Image Library, it's not the perfect way but it works for me, and I hope you adjust it for your purposes.
Reduce Ionic 4 app Loading Time Tips
You want to decrease loading time for your ionic 3 or ionic 4 applications, so you are in the right place, it's easy just follow up this article and your good to go.
How to make a custom input file ionic 4
You may have searched for long, how to personalize the input file in an ionic 3 or 4 application, here is the easiest and simplest way to do that.