Press n or j to go to the next uncovered block, b, p or k for the previous block.
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<div :class="$style.root">
<div :class="$style.body" :position="currentPosition" ref="body" vusion-slot-name="default">
<slot></slot>
</div>
</div>
</template>
<script>
import event from '../../utils/event';
import { findScrollParent } from '../../utils/dom';
import throttle from 'lodash/throttle';
export default {
name: 'u-footbar',
props: {
position: { type: String, default: 'static' },
scrollParent: HTMLElement,
},
data() {
return {
currentPosition: this.position,
currentScrollParent: this.scrollParent,
};
},
watch: {
position(position) {
this.currentPosition = position;
if (position === 'auto') {
this.setAutoBar();
} else {
event.off(this.currentScrollParent, 'scroll', this.cb);
}
},
},
destroyed() {
event.off(this.currentScrollParent, 'scroll', this.cb);
},
mounted() {
this.currentScrollParent
= this.scrollParent || findScrollParent(this.$el);
},
methods: {
setAutoBar() {
const currentElem = this.$el;
const bodyEl = this.$refs.body;
const cntHeight = bodyEl.getBoundingClientRect();
this.checkPos1 = throttle(this.checkPos, 500);
this.checkPos1(currentElem, cntHeight.height);
this.cb = (e) => {
this.checkPos1(currentElem, cntHeight.height);
};
event.on(this.currentScrollParent, 'scroll', this.cb);
},
checkPos(currentElem, cntHeight = 0) {
const viewPortHeight
= window.innerHeight
|| document.documentElement.clientHeight
|| document.body.clientHeight;
const elemOffset = currentElem.getBoundingClientRect();
if (elemOffset.top < viewPortHeight - cntHeight / 2) {
this.currentPosition = 'auto';
} else {
this.currentPosition = 'fixed';
}
},
},
};
</script>
<style module>
.root {
position: relative;
}
.body {
padding: 20px 0;
}
.body[position="static"] {
position: static;
}
.body[position="fixed"] {
position: fixed;
z-index: 100;
bottom: 0;
left: var(--sidebar-width);
right: 0;
background: var(--background-color-light);
padding: 20px 40px;
color: var(--color-base);
border: 1px solid var(--border-color-base);
box-shadow: 0 0 10px 0 rgba(80, 90, 109, 0.16);
animation: slideInUp var(--transition-duration-slow) both;
}
@keyframes slideInUp {
from {
transform: translate3d(0, 100%, 0);
visibility: visible;
}
to {
transform: translate3d(0, 0, 0);
}
}
</style>
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