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perf(mixin/placeable): register listeners on demand

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This commit is contained in:
07akioni 2020-05-19 00:10:51 +08:00
parent 61ea1063bb
commit bd0584f319
1 changed files with 16 additions and 6 deletions
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22
src/_mixins/placeable.js
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@ -1,6 +1,5 @@
import scrollDelegate from '../_utils/delegate/scrollDelegate'
import resizeDelegate from '../_utils/delegate/resizeDelegate'
import getParentNode from '../_utils/dom/getParentNode'
import getScrollParent from '../_utils/dom/getScrollParent'
import {
getAdjustedPlacementOfTrackingElement,
@ -169,6 +168,11 @@ export default {
watch: {
active (value) {
if (value) {
if (this.listenersRegistered) {
this.registerScrollListeners()
this.registerResizeListener()
this.listenersRegistered = true
}
this.$nextTick().then(this.updatePosition)
}
},
@ -184,17 +188,23 @@ export default {
trackingElement: null,
trackedElement: null,
scrollListeners: [],
adjustedPlacement: this.placement
adjustedPlacement: this.placement,
listenersRegistered: false
}
},
mounted () {
this.registerScrollListeners()
this.registerResizeListener()
if (this.active) {
this.registerScrollListeners()
this.registerResizeListener()
this.listenersRegistered = true
}
this.updatePosition()
},
beforeDestroy () {
this.unregisterScrollListeners()
this.unregisterResizeListener()
if (this.listenersRegistered) {
this.unregisterScrollListeners()
this.unregisterResizeListener()
}
},
methods: {
_getTrackingElement () {