`save_map()` does not set widget `width`/`height` properties correctly before saving/capture

[danielvartan]

Summary

mapgl::save_map() does not consistently set the widget width and height properties correctly before rendering/capture. This can produce images with dimensions that do not match the values passed to save_map(width = ..., height = ...).

Reproducible Example

library(geobr)
library(mapgl)

brazil_shape <- read_country()

map <- 
  brazil_shape |>
  maplibre(
    width = "1000px",
    height = "1000px",
    bounds = _
  ) |>
  add_fill_layer(
    id = "fill",
    source = brazil_shape,
    fill_color = "blue"
  ) |>
  add_navigation_control()

map |>
  save_map(
    width = 1000,
    height = 500,
    hide_controls = TRUE
  )

Result:

Expected behavior

Output image dimensions should match the save_map() arguments.

Actual behavior

Exported dimensions can be inconsistent because widget width/height are not correctly set before rendering.

Environment

devtools::session_info()
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#>  date     2026-04-05
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#> ──────────────────────────────────────────────────────────────────────────────

^{Created on 2026-04-05 with reprex v2.1.1}