Package Exports

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Readme

Feature Targeting

MDC Feature Targeting provides infrastructure to allow CSS styles to be included or excluded categorically.

Most of the time, you shouldn't need to depend on mdc-feature-targeting directly. However, understanding it can be useful if you're interested in having more control over when certain types of MDC styles are emitted.

Installation

npm install @material/feature-targeting

Basic Usage

Styles

Authoring component styles:

@use "@material/feature-targeting";

@mixin my-component-core-styles($query: feature-targeting.all()) {
  $feat-structure: feature-targeting.create-target($query, structure);

  @include feature-targeting.targets($feat-structure) {
    // ...
  }
}

Consuming component styles:

@use "@material/feature-targeting";
@use "my-component-mixins";

// To include all styles (using the default of mdc-feature-all() defined above):
@include my-component-core-styles;

// Or, to include a specific subset of styles:
@include my-component-core-styles(structure);
@include my-component-core-styles(feature-targeting.any(color, typography));
// The above two @includes and the following @include would produce equivalent results:
@include my-component-core-styles(feature-targeting.without(animation));

Sass Mixins and Functions

Mixin	Description
`targets($feature-targets...)`	Conditionalizes content to only be emitted if the given feature target(s) is/are queried.

Function	Description
`create-target($feature-query, $targeted-feature)`	Returns a variable to be passed to `targets` in order to filter emitted styles.
`all($feature-queries...)`	Returns a query object which will result in emitting `targets` blocks that match all of the specified features. Passing no arguments results in all blocks being emitted, which is the most common use case.
`any($feature-queries...)`	Returns a query object which will result in emitting `targets` blocks that match any of the specified features. Passing no arguments results in no blocks being emitted.
`without($feature-query)`	Returns a query object which will result in emitting `targets` blocks that do not match the specified feature.

$feature-query and $feature-queries refer to one or more of the values listed below under Supported Features.

Supported Features

MDC Web's styles are currently split according to the following features:

structure - All baseline styles that don't fit into any other category
animation - Styles responsible for causing animations and transitions to occur
color - Color-specific styles which rely on mdc-theme variables
typography - Typography-specific styles which rely on mdc-typography