How to inject styles from classes when assembling an HTML email template?

Question

Building projects

I need to compose letters for mailing lists, and it is desirable to specify inline styles in them. Is it possible to replace classes in the HTML/EGS template with the styles of this class? For example, I write in the template: There is a class (can be connected to the template or be registered in it):
<p class="style-font">

.style-font {
  color: red;
  padding-top:0;
}

After assembly, you should get HTML, in which all classes are replaced by styles: Something like mixins in the template itself. I'm sure there is already a solution...
<p style="color:red; padding-top:0;">

Answer 1

https://www.npmjs.com/package/inline-css