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Wrapping a legacy with a function

In this section, we will demonstrate how to write a wrapper function for a legacy web-based system. To achieve this, we use the chromeless library (https://github.com/graphcool/chromeless) to connect to a headless Chrome instance. Then the chromeless script drives the Chrome browser to do the rest for us.

The following diagram shows the working mechanism of this part of the system:

Figure 8.11: Diagram of implementing an OpenFaaS function to wrap around a UI-based ERP

What does chromeless do? chromeless is a Node.js library that can be used to perform browser automation, similar to PhantomJS or Selenium. But ...

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