add comment how offset from bottom is calculated

2020-03-03 15:42:44 +01:00 · 2020-03-03 15:42:44 +01:00 · 462c3411b2
parent 91aa8d4a3a
commit 462c3411b2
1 changed files with 1 additions and 0 deletions
--- a/src/components/structures/ScrollPanel.js
+++ b/src/components/structures/ScrollPanel.js
@ -765,6 +765,7 @@ export default createReactClass({
    },

    _topFromBottom(node) {
+        // current capped height - distance from top = distance from bottom of container to top of tracked element
        return this._itemlist.current.clientHeight - node.offsetTop;
    },