feat(infinite-scroll): adding preserveRerenderScrollPosition property#30566
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feat(infinite-scroll): adding preserveRerenderScrollPosition property#30566
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… that allows infinite scroll to keep the scroll position during a full re-render of its contents
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package: core
…lready locked, prevent useless setTimeout from being set up while preserve rerender scroll property isn't set
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Issue number: resolves internal
What is the current behavior?
Currently, if you use infinite scroll and fully change out elements in the DOM, you'll lose your scroll position. This can present as a race condition in some frameworks, like React, but will present pretty consistently in vanilla JavaScript. This happens because the browser is removing the old elements from the DOM and adding the new ones, and during that time the container holding the old elements will shrink and the browser will adjust the top position to be the maximum of the new container height.
What is the new behavior?
With this new property (
preserveRerenderScrollPosition) set, we will loop through siblings of the infinite scroll and set their min-heights to be their current heights before triggering theionInfiniteevent, then we clean up after complete is called by restoring their previous min-heights or setting them to auto if there were none. This prevents the container from resizing and the browser from losing the scroll position.Does this introduce a breaking change?
Other information
Current dev build: