# All files / src button.js

98.51% Statements 66/67
97.14% Branches 34/35
100% Functions 10/10
98.51% Lines 66/67

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     /**
     * --------------------------------------------------------------------------
     * CoreUI (v3.3.0): button.js
     * Licensed under MIT (https://coreui.io/license)
     *
     * This component is a modified version of the Bootstrap's buttons.js
     * Bootstrap (v5.0.0): buttons.js
     * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
     * --------------------------------------------------------------------------
     */

    import { getjQuery } from './util/index'
    import Data from './dom/data'
    import EventHandler from './dom/event-handler'
    import SelectorEngine from './dom/selector-engine'

    /**
     * ------------------------------------------------------------------------
     * Constants
     * ------------------------------------------------------------------------
     */

    const NAME = 'button'
    const VERSION = '3.2.2'
    const DATA_KEY = 'coreui.button'
    const EVENT_KEY = `.${DATA_KEY}`
    const DATA_API_KEY = '.data-api'

    const CLASS_NAME_ACTIVE = 'active'
    const CLASS_NAME_DISABLED = 'disabled'
    const CLASS_NAME_FOCUS = 'focus'

    const SELECTOR_DATA_TOGGLE_CARROT = '[data-toggle^="button"]'
    const SELECTOR_DATA_TOGGLE = '[data-toggle="buttons"]'
    const SELECTOR_INPUT = 'input:not([type="hidden"])'
    const SELECTOR_ACTIVE = '.active'
    const SELECTOR_BUTTON = '.btn'

    const EVENT_CLICK_DATA_API = `click${EVENT_KEY}${DATA_API_KEY}`
    const EVENT_FOCUS_DATA_API = `focus${EVENT_KEY}${DATA_API_KEY}`
    const EVENT_BLUR_DATA_API = `blur${EVENT_KEY}${DATA_API_KEY}`

    /**
     * ------------------------------------------------------------------------
     * Class Definition
     * ------------------------------------------------------------------------
     */

    class Button {
      constructor(element) {
        this._element = element
        Data.setData(element, DATA_KEY, this)
      }

      // Getters

      static get VERSION() {
        return VERSION
      }

      // Public

      toggle() {
        let triggerChangeEvent = true
        let addAriaPressed = true

        const rootElement = this._element.closest(SELECTOR_DATA_TOGGLE)

        if (rootElement) {
          const input = SelectorEngine.findOne(SELECTOR_INPUT, this._element)

          if (input && input.type === 'radio') {
            if (input.checked &&
              this._element.classList.contains(CLASS_NAME_ACTIVE)) {
              triggerChangeEvent = false
            } else {
              const activeElement = SelectorEngine.findOne(SELECTOR_ACTIVE, rootElement)

              if (activeElement) {
                activeElement.classList.remove(CLASS_NAME_ACTIVE)
              }
            }

            if (triggerChangeEvent) {
              Iif (input.hasAttribute('disabled') ||
                rootElement.hasAttribute('disabled') ||
                input.classList.contains(CLASS_NAME_DISABLED) ||
                rootElement.classList.contains(CLASS_NAME_DISABLED)) {
                return
              }

              input.checked = !this._element.classList.contains(CLASS_NAME_ACTIVE)
              EventHandler.trigger(input, 'change')
            }

            input.focus()
            addAriaPressed = false
          }
        }

        if (addAriaPressed) {
          this._element.setAttribute('aria-pressed',
            !this._element.classList.contains(CLASS_NAME_ACTIVE))
        }

        if (triggerChangeEvent) {
          this._element.classList.toggle(CLASS_NAME_ACTIVE)
        }
      }

      dispose() {
        Data.removeData(this._element, DATA_KEY)
        this._element = null
      }

      // Static

      static jQueryInterface(config) {
        return this.each(function () {
          let data = Data.getData(this, DATA_KEY)

          if (!data) {
            data = new Button(this)
          }

          if (config === 'toggle') {
            data[config]()
          }
        })
      }

      static getInstance(element) {
        return Data.getData(element, DATA_KEY)
      }
    }

    /**
     * ------------------------------------------------------------------------
     * Data Api implementation
     * ------------------------------------------------------------------------
     */

    EventHandler.on(document, EVENT_CLICK_DATA_API, SELECTOR_DATA_TOGGLE_CARROT, event => {
      event.preventDefault()

      const button = event.target.closest(SELECTOR_BUTTON)

      let data = Data.getData(button, DATA_KEY)
      if (!data) {
        data = new Button(button)
      }

      data.toggle()
    })

    EventHandler.on(document, EVENT_FOCUS_DATA_API, SELECTOR_DATA_TOGGLE_CARROT, event => {
      const button = event.target.closest(SELECTOR_BUTTON)

      if (button) {
        button.classList.add(CLASS_NAME_FOCUS)
      }
    })

    EventHandler.on(document, EVENT_BLUR_DATA_API, SELECTOR_DATA_TOGGLE_CARROT, event => {
      const button = event.target.closest(SELECTOR_BUTTON)

      if (button) {
        button.classList.remove(CLASS_NAME_FOCUS)
      }
    })

    const $ = getjQuery()

    /**
     * ------------------------------------------------------------------------
     * jQuery
     * ------------------------------------------------------------------------
     * add .button to jQuery only if jQuery is present
     */
    /* istanbul ignore if */
    if ($) {
      const JQUERY_NO_CONFLICT = $.fn[NAME]
      $.fn[NAME] = Button.jQueryInterface
      $.fn[NAME].Constructor = Button

      $.fn[NAME].noConflict = () => {
        $.fn[NAME] = JQUERY_NO_CONFLICT
        return Button.jQueryInterface
      }
    }

    export default Button