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<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
}
},
data() {
return {
active: false,
position: '',
currentTop: '',
width: undefined,
height: undefined,
child: null,
stickyHeight: 0
};
},
methods: {
sticky() {
if (this.active) {
return
}
this.position = 'fixed';
this.active = true;
this.width = this.width + 'px';
},
reset() {
if (!this.active) {
return
}
this.position = '';
this.width = 'auto'
this.active = false
},
handleScroll() {
this.width = this.$el.getBoundingClientRect().width;
const offsetTop = this.$el.getBoundingClientRect().top;
if (offsetTop <= this.stickyTop) {
this.sticky();
return
}
this.reset()
}
},
mounted() {
this.height = this.$el.getBoundingClientRect().height;
window.addEventListener('scroll', this.handleScroll);
},
destroyed() {
window.removeEventListener('scroll', this.handleScroll);
}
};
</script>