Summary

Converts Docsify and its internal mixins to ES classes. The advantage is static typing: this change begins to allow IDEs like VS Code to know the shape of classes for type checking and intellisense, so devs can go-to-definition on methods, or see if they are passing the wrong data type (still needs work, but this is a first step).

Docsify-classes.mp4

What kind of change does this PR introduce?

Refactor

For any code change,

• Related documentation has been updated if needed
• Related tests have been updated or tests have been added

Does this PR introduce a breaking change? (check one)

• Yes
• No

If yes, please describe the impact and migration path for existing applications:

Related issue, if any:

Tested in the following browsers:

• Chrome
• Firefox
• Safari
• Edge
• IE