Question

How to prevent a text label in a Deneb (Vega-Lite) visual from overflowing a containing shape?

In a Deneb visual using Vega-Lite, I have text labels inside shapes like bars or boxes. However, the labels sometimes overflow the boundaries of their containers. I’m looking for a way to dynamically constrain the text to prevent overflow or clipping in the visual layout.

Answer 1

To prevent text overflow in Deneb (Vega-Lite):

• Use "clip": true in the mark to confine text.

• Add "limit" in encode to restrict width (e.g., 50px).

• Optionally add "ellipsis": "…" to truncate overflow.

Example:

"mark": { "type": "text", "clip": true },
"encode": {
  "enter": {
    "text": {"field": "label"},
    "limit": {"value": 50},
    "ellipsis": {"value": "…"},
    "align": {"value": "center"},
    "baseline": {"value": "middle"}
  }
}