[Angular] smart_rendering fail with Scheduler v6


I am working on an Angular project and I have upgraded to version 6.0.2 of DHTMLX. I want to load a large amont of data in a scheduler progressively when I scroll vertically. With the version 5.3.9, I used to use smart_rendering for this job.

With this new version, I have these problems:

1 - When I scroll with mouse wheel, this error occurs in the console and there is latency on the scroll.

2 - When I scroll with the buttons of vertical scroll, this error occurs. And we can show in the error message on the right of screen that the render of timeline marker fail, even if this option is disabled.

scheduler.config.mark_now = false;

3 - When I scroll by clicking on the scroll bar, I have the same error.

4 -When I scroll too fast, there are blanks instead of lines.

5 - When I click on cell with data like below, with element “1”, the element disappers. However, the behavior of the second click is normal, the modal of update appears.

This is a major problem for my use. If you need more details, don’t hesitate. Thanks in advance for your solutions,
Kind regards,

In addition, here is the initialization of my scheduler:

    name: 'timeline_month',
    render: 'tree',
    x_unit: 'day',
    x_date: '%d %D',
    x_step: 1,
    x_size: 31,
    x_start: 0,
    x_length: 31,
    y_unit: this.schedulerPointagesUnitaires.serverList('sections'),
    y_property: 'section_id',
    dy: 35,
    section_autoheight: false,
    folder_dy: 30,
    event_dy: 'full',
    first_hour: 12,
    last_hour: 13,
    cell_template: true,
    smart_rendering: true,

It is hard to suggest what might be wrong as I don’t see your code.
Please, send me a ready demo with all the necessary JavaScript and CSS files so that I can reproduce the issue locally.
Please check the angular demo with timeline and marker as an example:


Thanks @ArtyomBorisevich for your demo. I was not able to solve the problems. I added all the problems from your demo in another tab " schedulerSmartRendering". I hope you can find the cause of these problems.

angular13_gantt_scheduler_smart_rendering.zip (1.0 MB)

Kind regards,


In addition of other problems mentioned above in this topic, we have an another problem with the scroll bar. As you can see in the screenshot, the last column overlaps with the last column.

Most certainly, this problem is related to the smart_rendering problem.

Kind regards,