Is rule-based labelling available for qgis2web plugin?

Question

Does the qgis2web plugin support multi-attribute, rule-based labeling?

I'm trying to use the qgis2web plugin to export leaflet maps. The labeling on the map I want to export is rule-based. (eg if x > 0 label with a || x). An export with this style produces a map with no labels.

Here's what it looks like fully functional in QGIS:

If I get rid of the rule-based label, but still use the multi-attibute, multi-line label (eg “X” || ‘\n’ “Y” ), I get a Python export error and no web map is produced.

So in trying to troubleshoot, I changed all the symbology and labels to the simplest terms, and the map successfully exports with labels (but is ugly and doesn't display the data I want). That leads me to believe it is the multi-attribute, rule-based labeling that is the problem.

So in summary, does the qgis2web plugin support these types of labeling schema and I'm just doing it wrong, or is that a feature that's not available?

Answer 1

As far as I can see, rule-bases styles are supported, but not rule-based labelling.

But you can modify the js code manually afterwards to use different labelling for each defined rendering style rules.

Multi-line labels are possible, but the syntax in QGIS is something like

"city_label" || '\n' || "shape_area"

and you might have to escape empty (NULL) values.

If your aim is to exclude polygons with NULL or zero values from rendering and labelling, think of setting a filter in the layer's properties before exporting to web.