Skip to content

fix(item-update): visibility of range spanning items not always correct - #1846

Closed
ChristianKrebel wants to merge 1 commit into
visjs:masterfrom
SmartsquareGmbH:1657-long-items-disappearing
Closed

fix(item-update): visibility of range spanning items not always correct#1846
ChristianKrebel wants to merge 1 commit into
visjs:masterfrom
SmartsquareGmbH:1657-long-items-disappearing

Conversation

@ChristianKrebel

Copy link
Copy Markdown
Contributor

Items starting before the visible range and ending after it were not always shown if zoomed in too much because of the binary search used for it. I tried to fix the conditions but I could not get it to work with a binary search (maybe someone has a better way?). Also, different approaches like spatial index logic fixed the problem but did not improve performance. So I kept it simple and removed the binary search case for items that have an end time and always brute force check them for visibility. This may worsen performance when having many items with end times but in my manual testing (private repo) it is not performant either way.

Question: Should we make this fix optional per config because it may have a bigger impact?

Module: timeline/component/group

Fixes #1657

Remove binary search for items having an end time because items starting before range and ending after it were left out.

Fixes visjs#1657
_resetSubgroups() {
for (const subgroup in this.subgroups) {
if (this.subgroups.hasOwnProperty(subgroup)) {
if (Object.prototype.hasOwnProperty.call(this.subgroups, subgroup)) {

Copy link
Copy Markdown
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

This is not related to the fix but the pre-commit-hook did not let me commit without fixing it because it lints the whole file instead of only the changes.

@mojoaxel

mojoaxel commented Dec 3, 2025

Copy link
Copy Markdown
Member

@ChristianKrebel Thanks for looking into this and providing a fix!

I have not really tested this and it also might introduce a lower performance but this works should not be ignored. I think we should merge this!

@vis-bot

vis-bot commented Aug 5, 2026

Copy link
Copy Markdown
Collaborator

馃帀 This PR is included in version 8.5.3 馃帀

The release is available on:

Your semantic-release bot 馃摝馃殌

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Labels

Projects

None yet

Development

Successfully merging this pull request may close these issues.

Long items disappear from group if data are set

4 participants