Provide a way to support custom modifier separator

[qfox]

like block__elem_mod!!!val

For now it's impossible to do.

Purpose is using for Harry Roberts' notation: block__elem--mod_val.

[Yeti-or]

I would love smth like this: block😈elem🚬mod👯val

[qfox]

How it should be pronounced? Just curious.

[Yeti-or]

block elem modifier as always.
or sex, dugs & rock n' roll

[blond]

I think we need to add modName and modVal option, and remove mod option.

import bemNaming from 'bem-naming';

const myNaming = bemNaming({ modName: '--', modVal: '_' })

[blond]

Maybe we should wrap delimiters to delimiters field?

import bemNaming from 'bem-naming';

const myNaming = bemNaming({
    delimiters: { elem: '__', modName: '--', modVal: '_' },
    wordPattern: '[a-zA-Z0-9]+(?:-[a-zA-Z0-9]+)*'
});

[tadatuta]

I'd suggest to make mod polymorphic and support objects with { name: '', value: '' } as well as strings.
So it will be backward compatible and intuitive.

And I disagree with additional nesting with delimiters — there's just few opts, what's the point in grouping?