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perf: improve scroll performance

Browse source 
https://developers.google.com/web/updates/2016/06/passive-event-listeners
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Xmader 2021-01-07 01:57:13 -05:00
parent 20704eba75
commit d9d09c4e8f
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GPG key ID: A20B97FB9EB730E4
1 changed files with 3 additions and 3 deletions
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6
src/btn.ts
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@ -140,14 +140,14 @@ export class BtnList {
const anchorDiv = this.getBtnParent() const anchorDiv = this.getBtnParent()
const pos = () => this._positionBtns(anchorDiv, newParent) const pos = () => this._positionBtns(anchorDiv, newParent)
pos() pos()
document.addEventListener('readystatechange', pos) document.addEventListener('readystatechange', pos, { passive: true })
// reposition btns when window resizes // reposition btns when window resizes
window.addEventListener('resize', pos) window.addEventListener('resize', pos, { passive: true })
// reposition btns when scrolling // reposition btns when scrolling
const scroll = getScrollParent(anchorDiv) const scroll = getScrollParent(anchorDiv)
scroll.addEventListener('scroll', pos) scroll.addEventListener('scroll', pos, { passive: true })
} catch (err) { } catch (err) {
console.error(err) console.error(err)
} }