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List Registered Render Backends

Source: R/render.R
fr_backends.Rd

Returns a data frame listing all registered render backends, including built-in (RTF, LaTeX, PDF) and any custom backends added via fr_register_backend().

Usage

fr_backends()

Value

A data frame with columns format, extensions, and description.

See also

fr_register_backend(), fr_render()

Examples

# List built-in backends
fr_backends()
#>   format extensions                   description
#> 1    rtf   rtf, doc              Rich Text Format
#> 2  latex        tex     LaTeX source (tabularray)
#> 3    pdf        pdf               PDF via XeLaTeX
#> 4   html  html, htm HTML preview (self-contained)

# Register a custom backend, then view updated list
fr_register_backend(
  format = "csv",
  extensions = "csv",
  render_fn = function(spec, page_groups, col_panels, path) {
    utils::write.csv(spec$data, path, row.names = FALSE)
  },
  description = "CSV export (data only)"
)
fr_backends()
#>   format extensions                   description
#> 1    rtf   rtf, doc              Rich Text Format
#> 2  latex        tex     LaTeX source (tabularray)
#> 3    pdf        pdf               PDF via XeLaTeX
#> 4   html  html, htm HTML preview (self-contained)
#> 5    csv        csv        CSV export (data only)
fr_unregister_backend("csv")