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inbox: Fix assertion error on row being outside visible area.

This commit is contained in:
Aman Agrawal 2024-05-28 05:07:14 +00:00 committed by Tim Abbott
parent 05513c90f0
commit 847dbe5b91
1 changed files with 11 additions and 1 deletions
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12
web/src/inbox_ui.ts
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@ -1393,7 +1393,17 @@ function move_focus_to_visible_area(): void {
// We are aiming to get the first row if it is completely visible or the second row.
const inbox_row_below_filters = position.bottom + INBOX_ROW_HEIGHT;
const element_in_row = document.elementFromPoint(inbox_center_x, inbox_row_below_filters);
assert(element_in_row !== null);
if (!element_in_row) {
// `element_in_row` can be `null` according to MDN if:
// "If the specified point is outside the visible bounds of the document or
// either coordinate is negative, the result is null."
// https://developer.mozilla.org/en-US/docs/Web/API/Document/elementFromPoint
// This means by the time we reached here user has already scrolled past the
// row and it is no longer visible. So, we just return and let the next call
// to `move_focus_to_visible_area` handle it.
return;
}
const $element_in_row = $(element_in_row);
let $inbox_row = $element_in_row.closest(".inbox-row");