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|
<template>
<div
class="dropdown-wrapper"
:class="{ open }"
>
<button
class="dropdown-title"
type="button"
:aria-label="dropdownAriaLabel"
@click="handleDropdown"
>
<span class="title">{{ item.text }}</span>
<span
class="arrow down"
/>
</button>
<button
class="mobile-dropdown-title"
type="button"
:aria-label="dropdownAriaLabel"
@click="setOpen(!open)"
>
<span class="title">{{ item.text }}</span>
<span
class="arrow"
:class="open ? 'down' : 'right'"
/>
</button>
<DropdownTransition>
<ul
v-show="open"
class="nav-dropdown"
>
<li
v-for="(subItem, index) in item.items"
:key="subItem.link || index"
class="dropdown-item"
>
<h4 v-if="subItem.type === 'links'">
{{ subItem.text }}
</h4>
<ul
v-if="subItem.type === 'links'"
class="dropdown-subitem-wrapper"
>
<li
v-for="childSubItem in subItem.items"
:key="childSubItem.link"
class="dropdown-subitem"
>
<NavLink
:item="childSubItem"
@focusout="
isLastItemOfArray(childSubItem, subItem.items) &&
isLastItemOfArray(subItem, item.items) &&
setOpen(false)
"
/>
</li>
</ul>
<NavLink
v-else
:item="subItem"
@focusout="isLastItemOfArray(subItem, item.items) && setOpen(false)"
/>
</li>
</ul>
</DropdownTransition>
</div>
</template>
<script>
import NavLink from '@theme/components/NavLink.vue'
import DropdownTransition from '@theme/components/DropdownTransition.vue'
import last from 'lodash/last'
export default {
name: 'DropdownLink',
components: {
NavLink,
DropdownTransition
},
props: {
item: {
required: true
}
},
data () {
return {
open: false
}
},
computed: {
dropdownAriaLabel () {
return this.item.ariaLabel || this.item.text
}
},
watch: {
$route () {
this.open = false
}
},
methods: {
setOpen (value) {
this.open = value
},
isLastItemOfArray (item, array) {
return last(array) === item
},
/**
* Open the dropdown when user tab and click from keyboard.
*
* Use event.detail to detect tab and click from keyboard. Ref: https://developer.mozilla.org/en-US/docs/Web/API/UIEvent/detail
* The Tab + Click is UIEvent > KeyboardEvent, so the detail is 0.
*/
handleDropdown () {
const isTriggerByTab = event.detail === 0
if (isTriggerByTab) this.setOpen(!this.open)
}
}
}
</script>
<style lang="stylus">
.dropdown-wrapper
cursor pointer
.dropdown-title
display block
font-size 0.9rem
font-family inherit
cursor inherit
padding inherit
line-height 1.4rem
background transparent
border none
font-weight 500
color $textColor
&:hover
border-color transparent
.arrow
vertical-align middle
margin-top -1px
margin-left 0.4rem
.mobile-dropdown-title
@extends .dropdown-title
display none
font-weight 600
font-size inherit
&:hover
color $accentColor
.nav-dropdown
.dropdown-item
color inherit
line-height 1.7rem
h4
margin 0.45rem 0 0
border-top 1px solid #eee
padding 1rem 1.5rem 0.45rem 1.25rem
.dropdown-subitem-wrapper
padding 0
list-style none
.dropdown-subitem
font-size 0.9em
a
display block
line-height 1.7rem
position relative
border-bottom none
font-weight 400
margin-bottom 0
padding 0 1.5rem 0 1.25rem
&:hover
color $accentColor
&.router-link-active
color $accentColor
&::after
content ""
width 0
height 0
border-left 5px solid $accentColor
border-top 3px solid transparent
border-bottom 3px solid transparent
position absolute
top calc(50% - 2px)
left 9px
&:first-child h4
margin-top 0
padding-top 0
border-top 0
@media (max-width: $MQMobile)
.dropdown-wrapper
&.open .dropdown-title
margin-bottom 0.5rem
.dropdown-title
display: none
.mobile-dropdown-title
display: block
.nav-dropdown
transition height .1s ease-out
overflow hidden
.dropdown-item
h4
border-top 0
margin-top 0
padding-top 0
h4, & > a
font-size 15px
line-height 2rem
.dropdown-subitem
font-size 14px
padding-left 1rem
@media (min-width: $MQMobile)
.dropdown-wrapper
height 1.8rem
&:hover .nav-dropdown,
&.open .nav-dropdown
// override the inline style.
display block !important
&.open:blur
display none
.nav-dropdown
display none
// Avoid height shaked by clicking
height auto !important
box-sizing border-box;
max-height calc(100vh - 2.7rem)
overflow-y auto
position absolute
top 100%
right 0
background-color #fff
padding 0.6rem 0
border 1px solid #ddd
border-bottom-color #ccc
text-align left
border-radius 0.25rem
white-space nowrap
margin 0
</style>
|
