non-strict FEN validation parameter

[snk-js]

this closes #413

[jhlywa]

Hi and thanks @snk-js. This change is a bit too drastic and differs from the current chess.js conventions. Some methods currently use the optional {strict: boolean()} to allow illegal or non-standard behavior. My thinking is that we would add this optional parameter to the .load() method. Unlike the other uses of strict, the default value for .load should be {strict: true}.

I don't want to extend this to the constructor at this stage, as it may imply enabling/disabling the strict/permissive parser across the object.

I'm really cautious about introducing large changes at this stage in the 1.0.0 release cycle, but I'm willing to accept a PR for the relatively minor modification to load.

Thanks again for the contribution.

[snk-js]

Hi and thanks @snk-js. This change is a bit too drastic and differs from the current chess.js conventions. Some methods currently use the optional {strict: boolean()} to allow illegal or non-standard behavior. My thinking is that we would add this optional parameter to the .load() method. Unlike the other uses of strict, the default value for .load should be {strict: true}.

I don't want to extend this to the constructor at this stage, as it may imply enabling/disabling the strict/permissive parser across the object.

I'm really cautious about introducing large changes at this stage in the 1.0.0 release cycle, but I'm willing to accept a PR for the relatively minor modification to load.

Thanks again for the contribution.

I changed as follows, I had already do that way, and it was already optionally too. I do not think this is a drastic. Because we are dealing bypassing validations per se, it doesn't changed much from the original but I hope it's acceptable, many of the changes in this PR was formatting code. Let me know if this attends more briefly.