timezone options break the view

[lplip]

OS: windows 10

browser: firefox 70.0.1 / chrome 78.0.3904.97

version of vis.js :

• @component timeline-graph2d
• @Version 6.2.3
• @Date 2019-11-16T22:08:56Z

Hi, all

we use VisJS in our project to display a timeline representation on a data.
recently we update to the last version (6.2.3) and we face with "view jumping" problem
when the user is scrolling horizontally.
I try to find any information or something that can help on the web but without luck.
what I do find is that when I remove the timezone settings (we need to use UTC)
var options = { moment: function(date) { return vis.moment(date).utc(); } };
the problem is gone.
we found that this related to the moment option by eliminating feathers from this component.
and don't have more clue about how to fix it.
any help will be welcome

thanks!

[lplip]

UPDATE:
I don't 100% sure but, at TimeStep.js line 123 start function
after the roundToMinor sometimes the this.current changed to local time.
looks like reference problem or side-effect some were.
currently to fix it I FORCE set this.current to the correct settings by calling
this.options.moment again.
change to start function

from:
start() { this.current = this._start.clone(); this.roundToMinor();}

To:
start() { this.current = this._start.clone(); this.roundToMinor(); // force to use user configuration(options object). this.current = this.options.moment(this.current.valueOf()); }

[vis-bot]

🎉 This issue has been resolved in version 6.3.4 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀