Start a modular embeddable library based on Bootstrap

- Prefix CSS classes, variables, data attributes, parent selector
- Organize styles and components for importing as needed

accordion.scss

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+//
+// Base styles
+//
+
+.#{$class-prefix}accordion {
+  // scss-docs-start accordion-css-vars
+  --#{$prefix}accordion-color: #{$accordion-color};
+  --#{$prefix}accordion-bg: #{$accordion-bg};
+  --#{$prefix}accordion-transition: #{$accordion-transition};
+  --#{$prefix}accordion-border-color: #{$accordion-border-color};
+  --#{$prefix}accordion-border-width: #{$accordion-border-width};
+  --#{$prefix}accordion-border-radius: #{$accordion-border-radius};
+  --#{$prefix}accordion-inner-border-radius: #{$accordion-inner-border-radius};
+  --#{$prefix}accordion-btn-padding-x: #{$accordion-button-padding-x};
+  --#{$prefix}accordion-btn-padding-y: #{$accordion-button-padding-y};
+  --#{$prefix}accordion-btn-color: #{$accordion-button-color};
+  --#{$prefix}accordion-btn-bg: #{$accordion-button-bg};
+  --#{$prefix}accordion-btn-icon: #{escape-svg($accordion-button-icon)};
+  --#{$prefix}accordion-btn-icon-width: #{$accordion-icon-width};
+  --#{$prefix}accordion-btn-icon-transform: #{$accordion-icon-transform};
+  --#{$prefix}accordion-btn-icon-transition: #{$accordion-icon-transition};
+  --#{$prefix}accordion-btn-active-icon: #{escape-svg($accordion-button-active-icon)};
+  --#{$prefix}accordion-btn-focus-box-shadow: #{$accordion-button-focus-box-shadow};
+  --#{$prefix}accordion-body-padding-x: #{$accordion-body-padding-x};
+  --#{$prefix}accordion-body-padding-y: #{$accordion-body-padding-y};
+  --#{$prefix}accordion-active-color: #{$accordion-button-active-color};
+  --#{$prefix}accordion-active-bg: #{$accordion-button-active-bg};
+  // scss-docs-end accordion-css-vars
+}
+
+.#{$class-prefix}accordion-button {
+  position: relative;
+  display: flex;
+  align-items: center;
+  width: 100%;
+  padding: var(--#{$prefix}accordion-btn-padding-y) var(--#{$prefix}accordion-btn-padding-x);
+  @include font-size($font-size-base);
+  color: var(--#{$prefix}accordion-btn-color);
+  text-align: left; // Reset button style
+  background-color: var(--#{$prefix}accordion-btn-bg);
+  border: 0;
+  @include border-radius(0);
+  overflow-anchor: none;
+  @include transition(var(--#{$prefix}accordion-transition));
+
+  &:not(.#{$class-prefix}collapsed) {
+    color: var(--#{$prefix}accordion-active-color);
+    background-color: var(--#{$prefix}accordion-active-bg);
+    box-shadow: inset 0 calc(-1 * var(--#{$prefix}accordion-border-width)) 0 var(--#{$prefix}accordion-border-color); // stylelint-disable-line function-disallowed-list
+
+    &::after {
+      background-image: var(--#{$prefix}accordion-btn-active-icon);
+      transform: var(--#{$prefix}accordion-btn-icon-transform);
+    }
+  }
+
+  // Accordion icon
+  &::after {
+    flex-shrink: 0;
+    width: var(--#{$prefix}accordion-btn-icon-width);
+    height: var(--#{$prefix}accordion-btn-icon-width);
+    margin-left: auto;
+    content: "";
+    background-image: var(--#{$prefix}accordion-btn-icon);
+    background-repeat: no-repeat;
+    background-size: var(--#{$prefix}accordion-btn-icon-width);
+    @include transition(var(--#{$prefix}accordion-btn-icon-transition));
+  }
+
+  &:hover {
+    z-index: 2;
+  }
+
+  &:focus {
+    z-index: 3;
+    outline: 0;
+    box-shadow: var(--#{$prefix}accordion-btn-focus-box-shadow);
+  }
+}
+
+.#{$class-prefix}accordion-header {
+  margin-bottom: 0;
+}
+
+.#{$class-prefix}accordion-item {
+  color: var(--#{$prefix}accordion-color);
+  background-color: var(--#{$prefix}accordion-bg);
+  border: var(--#{$prefix}accordion-border-width) solid var(--#{$prefix}accordion-border-color);
+
+  &:first-of-type {
+    @include border-top-radius(var(--#{$prefix}accordion-border-radius));
+
+    > .#{$class-prefix}accordion-header .#{$class-prefix}accordion-button {
+      @include border-top-radius(var(--#{$prefix}accordion-inner-border-radius));
+    }
+  }
+
+  &:not(:first-of-type) {
+    border-top: 0;
+  }
+
+  // Only set a border-radius on the last item if the accordion is collapsed
+  &:last-of-type {
+    @include border-bottom-radius(var(--#{$prefix}accordion-border-radius));
+
+    > .#{$class-prefix}accordion-header .#{$class-prefix}accordion-button {
+      &.#{$class-prefix}collapsed {
+        @include border-bottom-radius(var(--#{$prefix}accordion-inner-border-radius));
+      }
+    }
+
+    > .#{$class-prefix}accordion-collapse {
+      @include border-bottom-radius(var(--#{$prefix}accordion-border-radius));
+    }
+  }
+}
+
+.#{$class-prefix}accordion-body {
+  padding: var(--#{$prefix}accordion-body-padding-y) var(--#{$prefix}accordion-body-padding-x);
+}
+
+
+// Flush accordion items
+//
+// Remove borders and border-radius to keep accordion items edge-to-edge.
+
+.#{$class-prefix}accordion-flush {
+  > .#{$class-prefix}accordion-item {
+    border-right: 0;
+    border-left: 0;
+    @include border-radius(0);
+
+    &:first-child { border-top: 0; }
+    &:last-child { border-bottom: 0; }
+
+    // stylelint-disable selector-max-class
+    > .#{$class-prefix}accordion-collapse,
+    > .#{$class-prefix}accordion-header .#{$class-prefix}accordion-button,
+    > .#{$class-prefix}accordion-header .#{$class-prefix}accordion-button.#{$class-prefix}collapsed {
+      @include border-radius(0);
+    }
+    // stylelint-enable selector-max-class
+  }
+}
+
+@if $enable-dark-mode {
+  @include color-mode(dark) {
+    .#{$class-prefix}accordion-button::after {
+      --#{$prefix}accordion-btn-icon: #{escape-svg($accordion-button-icon-dark)};
+      --#{$prefix}accordion-btn-active-icon: #{escape-svg($accordion-button-active-icon-dark)};
+    }
+  }
+}

alert.scss

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+//
+// Base styles
+//
+
+.#{$class-prefix}alert {
+  // scss-docs-start alert-css-vars
+  --#{$prefix}alert-bg: transparent;
+  --#{$prefix}alert-padding-x: #{$alert-padding-x};
+  --#{$prefix}alert-padding-y: #{$alert-padding-y};
+  --#{$prefix}alert-margin-bottom: #{$alert-margin-bottom};
+  --#{$prefix}alert-color: inherit;
+  --#{$prefix}alert-border-color: transparent;
+  --#{$prefix}alert-border: #{$alert-border-width} solid var(--#{$prefix}alert-border-color);
+  --#{$prefix}alert-border-radius: #{$alert-border-radius};
+  --#{$prefix}alert-link-color: inherit;
+  // scss-docs-end alert-css-vars
+
+  position: relative;
+  padding: var(--#{$prefix}alert-padding-y) var(--#{$prefix}alert-padding-x);
+  margin-bottom: var(--#{$prefix}alert-margin-bottom);
+  color: var(--#{$prefix}alert-color);
+  background-color: var(--#{$prefix}alert-bg);
+  border: var(--#{$prefix}alert-border);
+  @include border-radius(var(--#{$prefix}alert-border-radius));
+}
+
+// Headings for larger alerts
+.#{$class-prefix}alert-heading {
+  // Specified to prevent conflicts of changing $headings-color
+  color: inherit;
+}
+
+// Provide class for links that match alerts
+.#{$class-prefix}alert-link {
+  font-weight: $alert-link-font-weight;
+  color: var(--#{$prefix}alert-link-color);
+}
+
+
+// Dismissible alerts
+//
+// Expand the right padding and account for the close button's positioning.
+
+.#{$class-prefix}alert-dismissible {
+  padding-right: $alert-dismissible-padding-r;
+
+  // Adjust close link position
+  .#{$class-prefix}btn-close {
+    position: absolute;
+    top: 0;
+    right: 0;
+    z-index: $stretched-link-z-index + 1;
+    padding: $alert-padding-y * 1.25 $alert-padding-x;
+  }
+}
+
+
+// scss-docs-start alert-modifiers
+// Generate contextual modifier classes for colorizing the alert
+@each $state in map-keys($theme-colors) {
+  .#{$class-prefix}alert-#{$state} {
+    --#{$prefix}alert-color: var(--#{$prefix}#{$state}-text-emphasis);
+    --#{$prefix}alert-bg: var(--#{$prefix}#{$state}-bg-subtle);
+    --#{$prefix}alert-border-color: var(--#{$prefix}#{$state}-border-subtle);
+    --#{$prefix}alert-link-color: var(--#{$prefix}#{$state}-text-emphasis);
+  }
+}
+// scss-docs-end alert-modifiers

alert.ts

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+import BaseComponent, { DATA_PREFIX } from './base-component'
+import EventHandler from './dom/event-handler'
+import { enableDismissTrigger } from './utilities/component-functions'
+import { defineJQueryPlugin } from './utilities'
+
+/**
+ * Constants
+ */
+
+const NAME = 'alert'
+const DATA_KEY = `${DATA_PREFIX}.alert`
+const EVENT_KEY = `.${DATA_KEY}`
+
+const EVENT_CLOSE = `close${EVENT_KEY}`
+const EVENT_CLOSED = `closed${EVENT_KEY}`
+const CLASS_NAME_FADE = 'fade'
+const CLASS_NAME_SHOW = 'show'
+
+/**
+ * Class definition
+ */
+
+class Alert extends BaseComponent {
+  // Getters
+  static get NAME() {
+    return NAME
+  }
+
+  // Public
+  close() {
+    const closeEvent = EventHandler.trigger(this._element, EVENT_CLOSE)
+
+    if (closeEvent.defaultPrevented) {
+      return
+    }
+
+    this._element.classList.remove(CLASS_NAME_SHOW)
+
+    const isAnimated = this._element.classList.contains(CLASS_NAME_FADE)
+    this._queueCallback(() => this._destroyElement(), this._element, isAnimated)
+  }
+
+  // Private
+  _destroyElement() {
+    this._element.remove()
+    EventHandler.trigger(this._element, EVENT_CLOSED)
+    this.dispose()
+  }
+
+  // Static
+  static jQueryInterface(config) {
+    return this.each(function () {
+      const data = Alert.getOrCreateInstance(this)
+
+      if (typeof config !== 'string') {
+        return
+      }
+
+      if (data[config] === undefined || config.startsWith('_') || config === 'constructor') {
+        throw new TypeError(`No method named "${config}"`)
+      }
+
+      data[config](this)
+    })
+  }
+}
+
+/**
+ * Data API implementation
+ */
+
+enableDismissTrigger(Alert, 'close')
+
+/**
+ * jQuery
+ */
+
+// defineJQueryPlugin(Alert)
+
+export default Alert