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fix: scroll position after top-direction loading #329

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fix: scroll position after top-direction loading #329

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10 changes: 5 additions & 5 deletions src/utils.js
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Original file line number Diff line number Diff line change
Expand Up @@ -74,22 +74,22 @@ export const loopTracker = {
};

export const scrollBarStorage = {
key: '_infiniteScrollHeight',
key: '_infiniteScrollPosition',
getScrollElm(elm) {
return elm === window ? document.documentElement : elm;
},
save(elm) {
const target = this.getScrollElm(elm);

// save scroll height on the scroll parent
target[this.key] = target.scrollHeight;
// save scroll height and top position on the scroll parent
target[this.key] = [target.scrollHeight, target.scrollTop];
},
restore(elm) {
const target = this.getScrollElm(elm);

/* istanbul ignore else */
if (typeof target[this.key] === 'number') {
target.scrollTop = target.scrollHeight - target[this.key] + target.scrollTop;
if (typeof target[this.key][0] === 'number' && typeof target[this.key][1] === 'number') {
target.scrollTop = target.scrollHeight - target[this.key][0] + target[this.key][1];
}

this.remove(target);
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