Try to minimize defaults and demonstrate that in examples

[mliebelt]

I have the impression (not yet proved) that not all configuration can be left out, and get a useful working of the viewer then. For example, there is the possibility to set the pieceStyle or theme by setting a class in an inclosing div (which may be a bad idea either), but how does that work together with defaults, global defaults, left-out configuration parameters?

Check that this works in all circumstances, and decide what are reasonable defaults, which then are overwritten by configuration or global configuration

• [x] Check styles set by HTML (not configuration)
  • [x] pieceStyle: #345
  • [x] theme: #346
• [x] Check the defaults of all configuration parameters
  • [x] that are boolean like: orientation, showCoords, ...
  • [x] that are numbers like: width, height, boardWidth, ...
  • [x] that are strings like: mode, pieceStyle, theme, ...

    • 351

    • 352

  • [x] others?
• [x] demonstrate for each configuration parameter
  • [x] that it has a default that works
  • [x] all possibilities how it can overwritten: HTML, configuration, global configuration

[mliebelt]

The experiment of setting pieceStyle by HTML/CSS was strange:

• Setting the class in body element overwrites all other. You cannot change it later, nor by more local styles (in the div or below), not by setting it in the configuration. That seems to be a feature of Chessground (which I was not aware of).
• Setting the class in div element works well.

Checking again, this is only true for pieceStyle == merida. I have no explanation for that, will extract that to a different ticket.