gantt: mount was given both zoom ({zoom}) and width ({width}); zoom fixes the pixels-per-day, so the width is ignored and the plot scrolls. Drop one of the two.

Warnings reference › gantt.zoomWidth:*

Identifier

gantt.zoomWidth:*

Raised by

Gantt

Since

1.52.0

What happened

zoom and an explicit width are two ways of deciding the same thing. zoom fixes how many pixels a day gets, which decides the plot's width; the width you passed is therefore ignored and the plot scrolls inside its container instead of being squeezed to fit. Only a width you actually passed is reported - the default 'container' is not a conflict.

The fix

Keep zoom for a fixed day scale with scrolling, or keep width for a plot that fits a box. Not both.

The smallest fix

gantt.mount(el, { zoom: 'week' });

Reference

Covered in full at the API reference.