Support js() mode for mixes

[tadatuta]

bemhtml.compile(function() {
    block('b1').js()({ blah: 123  });
    block('b2').js()({ ololo: 'trololo' });
});

bemhtml.apply({
    block: 'b1',
    js: { zzzz: 555 },
    mix: { block: 'b2', js: { qqq: 'qweqwewqeq' } }
});

Resulted with

<div class="b1 b2 i-bem" data-bem='{"b1":{"zzzz":555,"blah":123},"b2":{"qqq":"qweqwewqeq"}}'></div>

but

<div class="b1 b2 i-bem" data-bem='{"b1":{"zzzz":555,"blah":123},"b2":{"qqq":"qweqwewqeq", "ololo": "trololo"}}'></div>

expected.

[qfox]

Why? Do we start executing templates for mixes?

[tadatuta]

@zxqfox https://github.com/bem/bem-core/blob/v2/common.blocks/i-bem/i-bem.bemhtml#L393-L457 ;)

[blond]

@tadatuta how i can replace js mode and ignore input BEMJSON?

[arikon]

Should we run all the templates for the mixes?

[qfox]

@blond There is the same question about tag or even attrs.style.

block('a')(
  tag().force()('qwe'),
  attrs().force().important()(function() {
    return {style: 'font-size: 40px !important!important!important!important'};
  })
);
// there is no way!
{ block: 'a', tag: 'non-qwe', attrs: { style: 'font-size: 42em' } }

etc.

[blond]

@zxqfox +1 for force()

[qfox]

@blond

[miripiruni]

Closed in favor of https://github.com/bem/bem-xjst/issues/340: Apply templates for mixes.

[miripiruni]

Closed in favor of #241