Theme

Provides a combination of functions, mixins, variables, helper classes, and base normalizations for theming any TREND project.

• Installation
• Basic Usage
• Variables
• Functions
• Mixins
• Classes

Installation

npm install @trend/theme

Basic Usage

// Import entire package.
@import "@trend/theme/styles";

// Import specific pieces.
@import "@trend/theme/scss/functions";
@import "@trend/theme/scss/mixins";
@import "@trend/theme/scss/variables";
// Default (normalization styles).
@import "@trend/theme/scss/theme";
// Additional typographic helper classes.
@import "@trend/theme/scss/helpers";

// Import more granular pieces.
@import "@trend/theme/scss/functions/pow";
@import "@trend/theme/scss/functions/theme";
@import "@trend/theme/scss/mixins/theme-prop";

Variables

SCSS

tc-theme-primary | string | Color value, defaults to $tc-color-grey map, 500 weight.

tc-theme-primary-over | string | Will set the appropriate color contrast according to the $tc-theme-primary.

tc-theme-accent | string | Color value, defaults to $tc-color-purple map, 500 weight.

tc-theme-accent-over | string | Will set the appropriate color contrast according to the $tc-theme-accent.

tc-theme-background | string | Sets a color string value to be applied to the background of application.

tc-theme-text-colors | map | Provide text colors according to light vs dark contrasts.

// Default settings.
$tc-theme-text-colors: (
  dark: (
    primary: rgba($_tc-color-contrast-dark, 0.87),
    accent: rgba($_tc-color-contrast-dark, 0.5),
    hint: rgba($_tc-color-contrast-dark, 0.38),
    disabled: rgba($_tc-color-contrast-dark, 0.25),
    icon: rgba($_tc-color-contrast-dark, 0.38)
  ),
  light: (
    primary: $_tc-color-contrast-light,
    accent: rgba($_tc-color-contrast-light, 0.7),
    hint: rgba($_tc-color-contrast-light, 0.5),
    disabled: rgba($_tc-color-contrast-light, 0.5),
    icon: rgba($_tc-color-contrast-light, 0.5)
  )
) !default;

$tc-theme-options | map | Primary text colors for each of the theme colors.

$tc-theme-options: (
  primary: ...,
  accent: ...,
  background: ...,
  surface: ...,
  over-primary: ...,
  over-accent: ...,
  over-surface: ...,
  text-primary-over-background: ...,
  text-accent-over-background: ...,
  text-hint-over-background: ...,
  text-disabled-over-background: ...,
  text-icon-over-background: ...,
  text-primary-over-light: ...,
  text-accent-over-light: ...,
  text-hint-over-light: ...,
  text-disabled-over-light: ...,
  text-icon-over-light: ...,
  text-primary-over-dark: ...,
  text-accent-over-dark: ...,
  text-hint-over-dark: ...,
  text-disabled-over-dark: ...,
  text-icon-over-dark: ...,
);

See tc-theme-fetch-option function on how to access map for values.

CSS

:root {
  --tc-theme-primary: ...;
  --tc-theme-accent: ...;
  --tc-theme-background: ...;
  --tc-theme-surface: ...;
  --tc-theme-over-primary: ...;
  --tc-theme-over-accent: ...;
  --tc-theme-over-surface: ...;
  --tc-theme-text-primary-over-background: ...;
  --tc-theme-text-accent-over-background: ...;
  --tc-theme-text-hint-over-background: ...;
  --tc-theme-text-disabled-over-background: ...;
  --tc-theme-text-icon-over-background: ...;
  --tc-theme-text-primary-over-light: ...;
  --tc-theme-text-accent-over-light: ...;
  --tc-theme-text-hint-over-light: ...;
  --tc-theme-text-disabled-over-light: ...;
  --tc-theme-text-icon-over-light: ...;
  --tc-theme-text-primary-over-dark: ...;
  --tc-theme-text-accent-over-dark: ...;
  --tc-theme-text-hint-over-dark: ...;
  --tc-theme-text-disabled-over-dark: ...;
  --tc-theme-text-icon-over-dark: ...;
}

// Referencing a variable in a rule.
.test {
  background-color: var(--tc-theme-accent);
}

Functions

tc-theme-fetch-option

string: $option | required | Requires $tc-theme-options to be in scope.

Returns value of option passed in from $tc-theme-options variable.

fetch-theme-option(primary);
//- #333

tc-theme-tone

color: $color | required

Returns either "light" or "dark" from passed in color value.

tc-theme-text-priority

string: $priority | Required, Existing key from $tc-theme-text-priority map

Returns value from key name passed in.

tc-theme-accessible-color

string: $bg-color | Required, existing key from $tc-theme-options.

string: $text-style | Optional, defaults to primary.

Returns the appropriate color constrast keyword from $tc-theme-text-colors.

Mixins

tc-theme-prop

Generate a rule that applies the correct theme color style to the passed in property.

string: $property | required | css property

string: $style | required | can be one of "color", "currenColor" or theme option from $tc-theme-options

boolean: $important | optional, defaults to false | add a important declaration to rule

boolean: $edgeOut | optional, defaults to false | avoid emitting CSS variables in Edge

.tc-theme-primary-bg {
  @include tc-theme-prop(background-color, primary, true);
}

//- Outputs:
.tc-theme-primary-bg {
  background-color: #333333 !important;
  background-color: var(--tc-theme-primary, #333333) !important;
}

Helper Classes

// Adjust the color of HTML node.

<span class="tc-theme-primary">...</span>
<span class="tc-theme-accent">...</span>
<span class="tc-theme-background">...</span>
<span class="tc-theme-surface">...</span>
<span class="tc-theme-over-primary">...</span>
<span class="tc-theme-over-accent">...</span>
<span class="tc-theme-over-surface">...</span>
<span class="tc-theme-text-primary-over-background">...</span>
<span class="tc-theme-text-accent-over-background">...</span>
<span class="tc-theme-text-hint-over-background">...</span>
<span class="tc-theme-text-disabled-over-background">...</span>
<span class="tc-theme-text-icon-over-background">...</span>
<span class="tc-theme-text-primary-over-light">...</span>
<span class="tc-theme-text-accent-over-light">...</span>
<span class="tc-theme-text-hint-over-light">...</span>
<span class="tc-theme-text-disabled-over-light">...</span>
<span class="tc-theme-text-icon-over-light">...</span>
<span class="tc-theme-text-primary-over-dark">...</span>
<span class="tc-theme-text-accent-over-dark">...</span>
<span class="tc-theme-text-hint-over-dark">...</span>
<span class="tc-theme-text-disabled-over-dark">...</span>
<span class="tc-theme-text-icon-over-dark">...</span>

// Adjust the background of HTML node.

<span class="tc-theme-primary-bg">...</span>
<span class="tc-theme-accent-bg">...</span>