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import Vue from 'vue'
import './tab_switcher.scss'
export default Vue.component('tab-switcher', {
name: 'TabSwitcher',
props: ['renderOnlyFocused', 'onSwitch'],
data () {
return {
active: this.$slots.default.findIndex(_ => _.tag)
}
},
methods: {
activateTab (index, dataset) {
return () => {
if (typeof this.onSwitch === 'function') {
this.onSwitch.call(null, index, this.$slots.default[index].elm.dataset)
}
this.active = index
}
}
},
beforeUpdate () {
const currentSlot = this.$slots.default[this.active]
if (!currentSlot.tag) {
this.active = this.$slots.default.findIndex(_ => _.tag)
}
},
render (h) {
const tabs = this.$slots.default
.map((slot, index) => {
if (!slot.tag) return
const classesTab = ['tab']
const classesWrapper = ['tab-wrapper']
if (index === this.active) {
classesTab.push('active')
classesWrapper.push('active')
}
return (
<div class={ classesWrapper.join(' ')}>
<button
disabled={slot.data.attrs.disabled}
onClick={this.activateTab(index)}
class={classesTab.join(' ')}>
{slot.data.attrs.label}</button>
</div>
)
})
const contents = this.$slots.default.map((slot, index) => {
if (!slot.tag) return
const active = index === this.active
if (this.renderOnlyFocused) {
return active
? <div class="active">{slot}</div>
: <div class="hidden"></div>
}
return <div class={active ? 'active' : 'hidden' }>{slot}</div>
})
return (
<div class="tab-switcher">
<div class="tabs">
{tabs}
</div>
<div class="contents">
{contents}
</div>
</div>
)
}
})
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