linkedin/css-blocks#15

This is a placeholder, I need to document my thoughts on how a partial analysis of element and template hierarchies would work.

The devDependency typedoc was updated from 0.15.0-0 to 0.15.0.

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We need to update css-property-parser with the latest support for properties and handle unknown properties transparently.

Based on postcss-colormin: http://cssnano.co/optimisations/colormin/

example:

.color1 {
  color: white;
}
.color2 {
  color: rgb(255, 255, 255);
}

becomes

.a {
  color: #fff;
}

Once OptiCSS runs on an analysis, the styles can be split by using subsets of the analysis to produce a base stylesheet for styles shared across code splits or styles that weren't enumerated as a part of a code split. Styles specific to each code split will be extracted to a split css file.

TBD: rewrite data may still be centralized, or it might be split-able as well.

Note: With declaration merging enabled, the benefits of code-splitting may not result in enough savings to warrant the extra complexity.

The devDependency rimraf was updated from 2.6.3 to 2.7.0.

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The devDependency husky was updated from 2.1.0 to 2.2.0.

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The devDependency mocha was updated from 6.1.4 to 6.2.0.

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Version 1.1.8 of typedoc-plugin-markdown was just published.

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The devDependency @types/chai was updated from 4.1.7 to 4.2.0.

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https://github.com/linkedin/opticss/blob/master/packages/opticss/src/Match/AttributeMatcher.ts#L217

The devDependency husky was updated from 2.4.0 to 2.4.1.

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We have detected a problem with your Greenkeeper config file 🚨

Greenkeeper currently can’t work with your greenkeeper.json config file because it is invalid. We found the following issue:

1. The root-level key commitMessages is invalid. If you meant to add a group named commitMessages, please put it in a root-level groups object. Valid root-level keys are groups and ignore.

Please correct this and commit the fix to your default branch (usually master). Greenkeeper will pick up your changes and try again. If in doubt, please consult the config documentation.

Here’s an example of a valid greenkeeper.json:

{
  groups: {
    frontend: {
      packages: [
        'webapp/package.json',
        'cms/package.json',
        'analytics/package.json'
      ]
    },
    build: {
      packages: [
        'package.json'
      ]
    }
  },
  ignore: [
    'standard',
    'eslint'
  ]
}

This files tells Greenkeeper to handle all dependency updates in two groups. All files in the frontend group will receive updates together, in one issue or PR, and the root-level package.json in the build group will be treated separately. In addition, Greenkeeper will never send updates for the standard and eslint packages.

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The dependency @types/prettier was updated from 1.16.4 to 1.18.0.

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The dependency source-map-support was updated from 0.5.12 to 0.5.13.

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The devDependency lerna was updated from 3.14.1 to 3.14.2.

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With the following input:

.foo { ... }
.bar { ... }

<div class="foo ( --- | bar )">Adam wuz here</div>

Only one permutation is emitted:

<div class="foo bar">Adam wuz here</div>

This permutation is omitted:

<div class="foo">Adam wuz here</div>

The devDependency typedoc-plugin-external-module-name was updated from 2.0.0 to 2.1.0.

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If an element has a classname that isn't in the source stylesheet, that class should be removed by the rewriter.

We can save the classes that are used in only the stylesheets during the initKnownIdents initializer and then create MarkAttributeValueObsolete actions for the classnames that are never found.

The dependency codemirror was updated from 5.47.0 to 5.48.0.

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https://twitter.com/chriseppstein/status/1204121630965764096

It seems like idents where the first digit is the least significant compresses better. Need to verify this with actual CSS files.

Some class names are blocked by ad blockers if they start with ad. We might want to create a more flexible blacklist capability to prevent such class names from being generated.

Some tags are implied. e.g. tbody is implied by a table. When doing selector matching for selector removal, simple tags selectors that are implied should be checked for the tags that imply them.

The devDependency @types/parse5 was updated from 5.0.1 to 5.0.2.

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Version 1.12.2 of @types/prettier was just published.

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There's not currently a way to represent an attribute as being present or not. The workaround right now would be use use a constant with an empty string as a value, but I'm not sure that would be interpreted correctly by the selector matching code.

Presently, dynamic states of an element are only able to express dynamism within the possible values for a single attribute. This works for css-blocks because all styles are passed to opticss as classnames, but css-blocks could similarly produce correlated analysis of many attributes and let opticss drive the optimization to classnames during rewrite. Other frameworks may have different ways of expressing styles that are more semantic and would be more correctly handled this way.

The dependency postcss was updated from 7.0.16 to 7.0.17.

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an optimized style that's set because it's inferred by both a static and a dynamic source value is currently returned as being set dynamically in addition to the static value. The dynamic class should be removed from the rewrite mapping.

When several different optimized stylesheets need to co-exist, the default settings for ident generation will conflict with each other. By configuring starting points with big enough gaps, the optimized stylesheets can safely avoid each other.

This is the optimization part from: linkedin/css-blocks#52

The dependency nearley was updated from 2.16.0 to 2.17.0.

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The old integration tests needed to be removed for copyright reasons. We need new integration tests.

ac97a0f