R Observatory: Metrics for shinysnap version 0.1.0

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

shinysnap

0.1.0Package record

Save and Restore the State of 'shiny' Applications

0packages depend

401downloads / year

–test coverage

13/13flavors OK

Overview

About

Maintained by Nan XiaoCRAN page ↗GitHub ↗Website ↗Issues ↗

Save the state of applications built with 'shiny', the web application framework by Chang et al. (2026) doi:10.32614/CRAN.package.shiny. Users can share their work and continue it in another session. Input values and selected values held by the server are saved in JSON (JavaScript Object Notation) files that can be read and edited by hand. Saved state can be restored without reloading the page or setting up bookmarking. Restoration waits for inputs that appear as the page changes and reports which values were restored, missing, or could not be applied.

Changes in 0.1.0

Initial release.

Snapshots

snap_take() captures the inputs that are on the page (as reported by the client script, so values of removed dynamic UI are dropped), the reactiveValues registered with snap_track(), and the values written by snap_on_save() hooks. Action buttons, passwords, values that shiny's serializers mark as unserializable, ids excluded with setBookmarkExclude(), and the patterns given to snap_enable(), snap_exclude(), and snap_include() are left out.
The snapshot object is a plain list of class shinysnap, with snap_inputs(), snap_values(), snap_meta(), and snap_diff().

Files

Show all changes in 0.1.0Hide the rest of the changes in 0.1.0

The canonical format is JSON: doubles written with the fewest digits that round-trip, typed wrappers for what JSON cannot say, deterministic layout. snap_serialize(), snap_unserialize(), snap_write(), and snap_read() convert; snap_write(format = "zip") writes a bundle that keeps uploaded files and, with unsupported = "rds", opaque R objects. Bundles are validated before extraction; embedded objects and .rds files need trust = TRUE.
snap_download_button(), snap_download_handler(), snap_file_input(), and snap_file_restore() replace the download and upload boilerplate.

Restore

snap_restore() restores a snapshot into the running session: tracked values are written back, snap_on_restore() hooks run, and the input values are sent to the browser at once, where the client script applies each one as soon as its input is on the page. shiny's restoreInput() mechanism is primed during the restore so dynamic UI is built with the restored values. A second restore cancels the first.
The restore report lists every input as applied, constructed, reapplied, missing, failed, mismatched, or skipped; snap_on_restored() hooks and snap_is_restoring() complete the server-side API.
snap_restorer() registers how an input's value becomes the message its binding understands, per binding name or per input id; built-in restorers cover shiny, bslib, and shinyMatrix inputs, and window.shinysnap.registerAdapter() is the JavaScript-side equivalent.

Interoperability

snap_as_bookmark_url() encodes a snapshot like URL bookmarking does, snap_as_test_inputs() feeds shiny::testServer(), and snap_attachment() returns the files kept in a bundle.

From NEWS.md in the release

Install

R (CRAN)pak (dev)Ubuntu (r2u)Fedora (COPR)

install.packages("shinysnap", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

if (!requireNamespace("pak", quietly = TRUE))
  install.packages("pak", repos = "https://cloud.r-project.org/")
pak::pak("nanxstats/shinysnap")

Development version from nanxstats/shinysnap. Installs pak first if it is not already available.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-shinysnap

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled. We list this channel from recorded r2u download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

bspm (used by r2u) also needs make: sudo apt install make

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-shinysnap

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

Health

CRAN checks

13OK

CRAN check page ↗

Slowest check: 2.1 min · r-release-macos-x86_64

Status changes

OK13 OKNow
OK2 OK2026-09-28

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 0.1.0

READMEYes · 391 wordsVignettesYes · 5 · dynamicNEWSYes · 67% structured · mentions 0.1.0Citation fileNoWebsiteYes · pkgdown

Help pages: 19 (1 internal)includes a package overview page
Examples that run: 100%18 run in a plain check (10 of them under a condition)
Exported functions with examples: 100%
Documented parameters: 83%
Return-value docs: 100%
Help pages citing references: 0%

Vignettes (5)

How these are measured

Downloads

401

CRAN downloads in the past year

Rank #25,221 · ~1/day · ~33/mo

Releases R versions

Daily download trend is not available in this view yet.

40130 days

40190 days

4011 year

Compare downloads with other packages →

Also on5 r2u

How downloads are counted

Repository

nanxstats/shinysnap ↗Account: nanxstats

1Stars

0Forks

0Open issues

0Open PRs

1Releases

29Commits

1Commit identities

29 commits · Last activity 2026-09-29

Responsiveness

How these are sampled

PRs merged (all time): 100%
Median days to close, 50 most recently updated closed issues: 10
Median days to close, 50 most recently updated closed PRs: 0

PRs over time

2026-09-28 · 12026-09-29 · 0

How these are measured

PracticesBeta

6 development-tooling and community-health practices detected across 3 families in the upstream repository

Checks run against github.com/nanxstats/shinysnap on 2026-10-25.

Continuous integration (2)

GitHub ActionsR CMD check workflow

The R CMD check workflow runs on Linux, macOS and Windows, and on R-devel

Docs source (3)

pkgdown

GitHub Pages site last deployed 2026-09-29 · The repository has a site deploy workflow

pkgdown site last built 2026-09-29

Lint, format, editor (1)

RStudio project

How this is detected·Detection ruleset v4 (2026-10-20)

AI coding toolsBeta

This repository shows signs of AI coding tools.

Claude Codefirst seen 2026-09-17
Pull request it wrote: opened by a project member
Commits: at least 6 crediting it in the message

Shared conventions any agent may read, so they name no particular tool.

Seen in the repository: AGENTS.md

Models named in its commits

Claude Fable 5.15 commits · Sep 2026
Claude Opus 4.81 commit · Sep 2026

Counts are commits, not lines of code. Commits by a tool's accounts count once across all of its accounts. Commits crediting it are the largest count among its credit lines, a minimum.How this is detected·Detection ruleset v4 (updated 2026-09-27)

Dependencies

Declared dependencies

17 external dependencies (excludes base and recommended)

Installing shinysnap adds 31 packages (20 with compiled code, 26 MB of source tarballs). Heaviest: bslib 5.6 MB, promises 3.1 MB, sass 2.9 MB.

Depends (0)

none

Imports (7)

htmltools jsonlite promises R6 shinyutilszmij

LinkingTo (0)

none

Suggests (11)

bslib chromote httpuv knitr later rmarkdown shinyMatrix shinytest2 testthat withr zip

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

How these are counted

Code & Tests

People & History

People (1)

Nan Xiao

Releases (1)

0.1.0Latest
record
2026-09-28 · current release
R
R 4.6.0 released · 2026-04-24

Package metadata

First published: 2026-09-28
Total releases: 1 / 1 yrs
License: MIT + file LICENSE OSI
Download size: 241 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("shinysnap")

Format

Xiao, N. (2026). shinysnap: Save and Restore the State of 'shiny' Applications (Version 0.1.0) [Computer software]. https://doi.org/10.32614/CRAN.package.shinysnap

This package has no citation file, so citation() returns this entry built from DESCRIPTION.

Cite the R Observatory

For a number measured here: a download total, a coverage figure, an archival date.

Format

APA

Balamuta, J. J. (2026). R Observatory: Metrics for shinysnap version 0.1.0 [Data set]. HJJB, LLC. Data release v2026-10-26. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-26, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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