bootstrap-vue/src/utils/target.js

BootstrapVue, with over 40 plugins and more than 80 custom components, custom directives, and over 300 icons, provides one of the most comprehensive implementations of Bootstrap v4 components and grid system for Vue.js. With extensive and automated WAI-AR

import { keys } from './object'
import { eventOn, eventOff } from './dom'

const allListenTypes = { hover: true, click: true, focus: true }

const BVBoundListeners = '__BV_boundEventListeners__'

const getTargets = binding => {
  const targets = keys(binding.modifiers || {}).filter(t => !allListenTypes[t])

  if (binding.value) {
    targets.push(binding.value)
  }

  return targets
}

const bindTargets = (vnode, binding, listenTypes, fn) => {
  const targets = getTargets(binding)

  const listener = () => {
    fn({ targets, vnode })
  }

  keys(allListenTypes).forEach(type => {
    if (listenTypes[type] || binding.modifiers[type]) {
      eventOn(vnode.elm, type, listener)
      const boundListeners = vnode.elm[BVBoundListeners] || {}
      boundListeners[type] = boundListeners[type] || []
      boundListeners[type].push(listener)
      vnode.elm[BVBoundListeners] = boundListeners
    }
  })

  // Return the list of targets
  return targets
}

const unbindTargets = (vnode, binding, listenTypes) => {
  keys(allListenTypes).forEach(type => {
    if (listenTypes[type] || binding.modifiers[type]) {
      const boundListeners = vnode.elm[BVBoundListeners] && vnode.elm[BVBoundListeners][type]
      if (boundListeners) {
        boundListeners.forEach(listener => eventOff(vnode.elm, type, listener))
        delete vnode.elm[BVBoundListeners][type]
      }
    }
  })
}

export { bindTargets, unbindTargets, getTargets }

export default bindTargets