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this.transition || ''\n : this.windowGroup.computedTransition\n }\n\n return typeof this.reverseTransition !== 'undefined'\n ? this.reverseTransition || ''\n : this.windowGroup.computedTransition\n }\n },\n\n mounted () {\n this.$el.addEventListener('transitionend', this.onTransitionEnd, false)\n },\n\n beforeDestroy () {\n this.$el.removeEventListener('transitionend', this.onTransitionEnd, false)\n },\n\n methods: {\n genDefaultSlot () {\n return this.$slots.default\n },\n onAfterEnter () {\n if (this.wasCancelled) {\n this.wasCancelled = false\n return\n }\n\n requestAnimationFrame(() => {\n this.windowGroup.internalHeight = undefined\n this.windowGroup.isActive = false\n })\n },\n onBeforeEnter () {\n this.windowGroup.isActive = true\n },\n onLeave (el: HTMLElement) {\n this.windowGroup.internalHeight = convertToUnit(el.clientHeight)\n },\n onEnterCancelled () {\n this.wasCancelled = true\n },\n onEnter (el: HTMLElement, done: () => void) {\n const isBooted = this.windowGroup.isBooted\n\n if (isBooted) this.done = done\n\n requestAnimationFrame(() => {\n if (!this.computedTransition) return done()\n\n this.windowGroup.internalHeight = convertToUnit(el.clientHeight)\n\n // On initial render, there is no transition\n // Vue leaves a `enter` transition class\n // if done is called too fast\n !isBooted && setTimeout(done, 100)\n })\n },\n onTransitionEnd (e: TransitionEvent) {\n // This ensures we only call done\n // when the element transform\n // completes\n if (\n e.propertyName !== 'transform' ||\n e.target !== this.$el ||\n !this.done\n ) return\n\n this.done()\n this.done = null\n }\n },\n\n render (h): VNode {\n const div = h('div', {\n staticClass: 'v-window-item',\n directives: [{\n name: 'show',\n value: this.isActive\n }],\n on: this.$listeners\n }, this.showLazyContent(this.genDefaultSlot()))\n\n return h('transition', {\n props: {\n name: this.computedTransition\n },\n on: {\n afterEnter: this.onAfterEnter,\n beforeEnter: this.onBeforeEnter,\n leave: this.onLeave,\n enter: this.onEnter,\n enterCancelled: this.onEnterCancelled\n }\n }, [div])\n }\n})\n"],"sourceRoot":""}