1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
<template>
<div :style="{height:height+'px',zIndex:zIndex}">
<div :class="className" :style="{top:stickyTop+'px',zIndex:zIndex,position:position,width:width,height:height+'px'}">
<slot>
<div>sticky</div>
</slot>
</div>
</div>
</template>
<script>
export default {
name: 'Sticky',
props: {
stickyTop: {
type: Number,
default: 0
},
zIndex: {
type: Number,
default: 1
},
className: {
type: String,
default: ''
}
},
data() {
return {
active: false,
position: '',
width: undefined,
height: undefined,
isSticky: false
}
},
mounted() {
this.height = this.$el.getBoundingClientRect().height
window.addEventListener('scroll', this.handleScroll)
window.addEventListener('resize', this.handleReize)
},
activated() {
this.handleScroll()
},
destroyed() {
window.removeEventListener('scroll', this.handleScroll)
window.removeEventListener('resize', this.handleReize)
},
methods: {
sticky() {
if (this.active) {
return
}
this.position = 'fixed'
this.active = true
this.width = this.width + 'px'
this.isSticky = true
},
reset() {
if (!this.active) {
return
}
this.position = ''
this.width = 'auto'
this.active = false
this.isSticky = false
},
handleScroll() {
this.width = this.$el.getBoundingClientRect().width
const offsetTop = this.$el.getBoundingClientRect().top
if (offsetTop < this.stickyTop) {
this.sticky()
return
}
this.reset()
},
handleReize() {
if (this.isSticky) {
this.width = this.$el.getBoundingClientRect().width + 'px'
}
}
}
}
</script>