Open the Square Point of Sale application from a custom mobile web application to process in-person payments using Square hardware.
This topic makes the following assumptions:
- You've read the introductory review of this API.
- You're familiar with basic web development. If you're new to web development, you should read Getting started with the Web by Mozilla.org before continuing.
- You can create and run websites on localhost or a development server. If you're new to testing web pages locally, you should read Testing for supported countries before continuing.
- You're familiar with HTTP and JSON.
The example code in this topic assumes the following: