/
slider.vue
371 lines (341 loc) · 7.97 KB
/
slider.vue
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<template>
<div
:style="{ width: width, height: height }"
class="slider"
@mouseenter="handleMouseenter"
@mouseleave="handleMouseleave"
>
<slot v-if="!sliderItems.length" name="loading">
<div class="slider-loading">
<div class="ball-pulse">
<div />
<div />
<div />
</div>
</div>
</slot>
<div ref="touchArea" class="slider-items">
<slot />
</div>
<div
v-if="indicators"
:class="`slider-indicators slider-indicators-${indicators}`"
@click.stop
>
<span
v-for="i in sliderItems.length"
:key="i"
:class="{ 'slider-indicator-active': currentIndex === i - 1 }"
class="slider-indicator-icon"
@click="handleIndicator(i - currentIndex - 1)"
/>
</div>
<template v-if="controlBtn">
<button type="button" class="slider-btn slider-btn-left" :aria-label="prevBtnLabel" @click.stop="prev">
<i class="slider-icon slider-icon-left" aria-hidden="true"/>
</button>
<button type="button" class="slider-btn slider-btn-right" :aria-label="nextBtnLabel" @click.stop="next">
<i class="slider-icon slider-icon-right" aria-hidden="true"/>
</button>
</template>
</div>
</template>
<script>
import { throttle, debounce } from './utils'
import AlloyFinger from './alloyfinger'
export default {
name: 'Slider',
model: {
prop: 'value',
event: 'change',
},
props: {
value: {
type: Number,
default: 0,
},
width: {
type: String,
default: 'auto',
},
height: {
type: String,
default: '300px',
},
touch: {
type: Boolean,
default: true,
},
animation: {
type: String,
default: 'normal',
},
autoplay: {
type: Boolean,
default: true,
},
stopOnHover: {
type: Boolean,
default: false,
},
interval: {
type: Number,
default: 3000,
},
speed: {
type: Number,
default: 500,
},
indicators: {
type: [String, Boolean],
default: 'center',
},
controlBtn: {
type: Boolean,
default: true,
},
beforePrevious: {
type: Function,
default: () => true,
},
beforeNext: {
type: Function,
default: () => true,
},
prevBtnLabel: {
type: String,
default: 'Previous slide',
},
nextBtnLabel: {
type: String,
default: 'Next slide',
},
},
data() {
return {
sliderItems: [],
currentIndex: 0,
timer: 0,
af: null,
isStopped: false,
}
},
watch: {
// FIXME: debounce
value(current) {
const step = current - this.currentIndex
if (!step || current < 0 || current > this.sliderItems.length - 1) return
this.handleIndicator(step)
},
},
created() {
this.init = throttle(this.init, 100)
this.move = debounce(this.move, this.speed - 200)
this.$on('slider:init', this.init)
},
mounted() {
this.init()
this.initTouchArea()
},
// init when keep-alive
activated() {
this.init()
this.initTouchArea()
},
beforeDestroy() {
this.timer && clearInterval(this.timer)
this.af && this.af.destroy()
},
deactivated() {
this.timer && clearInterval(this.timer)
this.af && this.af.destroy()
this.af = null
},
methods: {
init() {
this.sliderItems = this.$children.filter(child => {
return child.$options.name === 'SliderItem'
})
if (this.sliderItems[this.value]) {
this.currentIndex = this.value
}
const currentItem = this.sliderItems[this.currentIndex]
if (!currentItem) return
currentItem.init()
this.auto()
},
initTouchArea() {
if (this.af || !this.touch) return
const touchArea = this.$refs.touchArea
this.af = new AlloyFinger(touchArea, {
swipe: e => {
e.direction === 'Left' ? this.next() : this.prev()
},
})
},
auto() {
if (!this.autoplay || this.isStopped) return
if (this.timer) clearInterval(this.timer)
this.timer = setInterval(() => {
this.move(1)
}, this.interval)
},
move(step) {
if (!step || !this.canMove()) return
// direction: left: true, right: false
const direction = step > 0
const nextIndex = this.getNextIndex(step)
const currentItem = this.sliderItems[this.currentIndex]
const nextItem = this.sliderItems[nextIndex]
currentItem.hide(direction)
nextItem.show(direction)
this.currentIndex = nextIndex
this.$emit('change', nextIndex)
},
prev() {
if (!this.beforePrevious()) return
this.handleControlBtn('previous')
},
next() {
if (!this.beforeNext()) return
this.handleControlBtn('next')
},
handleIndicator(step) {
if (!step || !this.canMove()) return
this.move(step)
this.auto()
},
/**
* @param direction 'previous' | 'next'
*/
handleControlBtn(direction) {
if (!this.canMove()) return
const step = direction === 'next' ? 1 : -1
const nextIndex = this.getNextIndex(step)
this.$emit(direction, {
original: this.currentIndex,
next: nextIndex,
})
this.move(step)
this.auto()
},
getNextIndex(step) {
const slidersLen = this.sliderItems.length
if (!this.sliderItems[this.currentIndex]) {
this.currentIndex = slidersLen - 1
}
return (this.currentIndex + step + slidersLen) % slidersLen
},
canMove() {
return this.sliderItems.length > 1
},
handleMouseenter() {
if (this.autoplay && this.stopOnHover) {
this.isStopped = true
if (this.timer) clearInterval(this.timer)
}
},
handleMouseleave() {
if (this.autoplay && this.stopOnHover) {
this.isStopped = false
this.auto()
}
},
},
}
</script>
<style lang="stylus" scoped>
.slider
position relative
overflow hidden
&-items
width 100%
height 100%
&-btn
position absolute
top 0
z-index 999
height 100%
width 50px
border none
background rgba(0, 0, 0, .1)
outline none
transition background .3s
cursor pointer
&:hover .slider-icon
border-color rgba(255, 255, 255, 1)
&-btn-left
left 0
background linear-gradient(90deg, rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0))
&-btn-right
right 0
background linear-gradient(-90deg, rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0))
&-icon
display inline-block
width 15px
height 15px
border-left 2px solid rgba(255, 255, 255, .6)
border-bottom 2px solid rgba(255, 255, 255, .6)
transition border .2s
&-icon-left
transform rotate(45deg)
&-icon-right
transform rotate(-135deg)
&-indicators
position absolute
bottom 20px
z-index 999
&-center
left 50%
transform translateX(-50%)
&-left
left 6%
&-right
right 6%
&-indicator-icon
display inline-block
width 10px
height 10px
margin 0 .1rem
cursor pointer
border-radius 50%
background-color rgba( 0, 0, 0, .2)
&-indicator-active
background-color rgba( 255, 255, 255, .2)
&-loading
position absolute
top 0
left 0
z-index 99
width 100%
height 100%
background rgba(0, 0, 0, .1)
display flex
justify-content center
align-items center
.ball-pulse
& > div:nth-child(1)
animation scale 0.75s -0.24s infinite cubic-bezier(0.2, 0.68, 0.18, 1.08)
& > div:nth-child(2)
animation scale 0.75s -0.12s infinite cubic-bezier(0.2, 0.68, 0.18, 1.08)
& > div:nth-child(3)
animation scale 0.75s 0s infinite cubic-bezier(0.2, 0.68, 0.18, 1.08)
& > div
background-color #fff
width 15px
height 15px
border-radius 100%
margin 2px
animation-fill-mode both
display inline-block
@keyframes scale
0%
transform scale(1)
opacity 1
45%
transform scale(0.1)
opacity 0.7
80%
transform scale(1)
opacity 1
</style>