2a09d1a4
 liuqimichale
添加宜春 天水 宣化
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import Vue from 'vue';
export default function scrollIntoView(container, selected) {
if (Vue.prototype.$isServer) return;
if (!selected) {
container.scrollTop = 0;
return;
}
const offsetParents = [];
let pointer = selected.offsetParent;
while (pointer && container !== pointer && container.contains(pointer)) {
offsetParents.push(pointer);
pointer = pointer.offsetParent;
}
const top = selected.offsetTop + offsetParents.reduce((prev, curr) => (prev + curr.offsetTop), 0);
const bottom = top + selected.offsetHeight;
const viewRectTop = container.scrollTop;
const viewRectBottom = viewRectTop + container.clientHeight;
if (top < viewRectTop) {
container.scrollTop = top;
} else if (bottom > viewRectBottom) {
container.scrollTop = bottom - container.clientHeight;
}
}
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