92 lines
2.0 KiB
Plaintext
92 lines
2.0 KiB
Plaintext
<template>
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<div :style="{height:height+'px',zIndex:zIndex}">
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<div
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:class="className"
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:style="{top:(isSticky ? stickyTop +'px' : ''),zIndex:zIndex,position:position,width:width,height:height+'px'}"
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>
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<slot>
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<div>sticky</div>
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</slot>
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</div>
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</div>
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</template>
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<script>
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export default {
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name: 'Sticky',
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props: {
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stickyTop: {
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type: Number,
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default: 0
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},
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zIndex: {
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type: Number,
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default: 1
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},
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className: {
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type: String,
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default: ''
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}
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},
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data() {
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return {
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active: false,
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position: '',
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width: undefined,
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height: undefined,
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isSticky: false
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}
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},
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mounted() {
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this.height = this.$el.getBoundingClientRect().height
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window.addEventListener('scroll', this.handleScroll)
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window.addEventListener('resize', this.handleResize)
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},
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activated() {
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this.handleScroll()
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},
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destroyed() {
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window.removeEventListener('scroll', this.handleScroll)
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window.removeEventListener('resize', this.handleResize)
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},
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methods: {
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sticky() {
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if (this.active) {
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return
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}
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this.position = 'fixed'
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this.active = true
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this.width = this.width + 'px'
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this.isSticky = true
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},
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handleReset() {
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if (!this.active) {
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return
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}
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this.reset()
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},
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reset() {
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this.position = ''
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this.width = 'auto'
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this.active = false
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this.isSticky = false
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},
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handleScroll() {
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const width = this.$el.getBoundingClientRect().width
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this.width = width || 'auto'
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const offsetTop = this.$el.getBoundingClientRect().top
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if (offsetTop < this.stickyTop) {
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this.sticky()
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return
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}
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this.handleReset()
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},
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handleResize() {
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if (this.isSticky) {
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this.width = this.$el.getBoundingClientRect().width + 'px'
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}
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}
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}
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}
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</script>
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