zarr-python
Zarr's package split keeps producing standalone tools: a server, now a lazy indexer.
Comparison · DevOps
clock vs htmltools
A side-by-side editorial comparison of clock and htmltools — release velocity, themes, recent moves, and the top alternatives to consider.
clock vs htmltools: at a glance
What is clock?
clock is turning calendar conventions lubridate hard-coded into parameterized types.
clock provides typed date-time handling for R on top of the C++20 date library, with explicit calendar and time-point types instead of implicit coercion. The visible history splits between genuine arithmetic additions and a long tail of compiler and CRAN-policy repairs. Recent releases are mostly the latter, with 0.7.3 raising the tzdb and R floors.
What is htmltools?
htmltools spends three releases walking back its own fill-layout opinions
htmltools generates the HTML that Shiny, bslib and R Markdown emit. Recent releases are dominated by one project - the fill and fillable layout system that powers bslib cards - being tuned release after release, surrounded by fixes for whatever testthat or R-devel changed underneath.
clock vs htmltools: editorial side-by-side
clock
0.0DEVOPS
clock is turning calendar conventions lubridate hard-coded into parameterized types.
◆ Current state
clock provides typed date-time handling for R on top of the C++20 date library, with explicit calendar and time-point types instead of implicit coercion. The visible history splits between genuine arithmetic additions and a long tail of compiler and CRAN-policy repairs. Recent releases are mostly the latter, with 0.7.3 raising the tzdb and R floors.
◆ Where it's heading
The feature arc moves toward making conventions explicit and parameterized rather than fixed: counting units between dates in 0.6.0, duration modulus and integer division alongside it, then a week-start-parameterized calendar in 0.7.0 that subsumes both ISO and CDC epidemiological weeks. Since 0.7.0 the package has added almost no surface, spending releases on C++ toolchain compliance instead. The 0.7.3 parsing change, following upstream to character-width rather than digit-count parsing, is the one recent break users must handle.
◆ Prediction
The last three releases are maintenance-shaped, so the next most likely tracks another tzdb or compiler requirement rather than adding calendars.
htmltools
0.0DEVOPS
htmltools spends three releases walking back its own fill-layout opinions
◆ Current state
htmltools generates the HTML that Shiny, bslib and R Markdown emit. Recent releases are dominated by one project - the fill and fillable layout system that powers bslib cards - being tuned release after release, surrounded by fixes for whatever testthat or R-devel changed underneath.
◆ Where it's heading
The fill work is converging rather than expanding: 0.5.6 stopped forcing overflow on fillable containers, 0.5.7 stopped forcing full width on fill items, and 0.5.8 lowered the CSS's precedence by moving it into a named cascade layer. Each step removes an opinion that broke someone's layout. The two most recent releases add nothing at all beyond test compatibility.
◆ Prediction
With the fill CSS now scoped to its own cascade layer, expect fewer layout corrections and a continued pattern of small releases driven by testthat and R-devel rather than new API.
Alternatives to clock and htmltools
Other DevOps products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either clock or htmltools.
ellipsis
ellipsis' checks live in rlang now; the package is a compatibility shim.
httpuv
httpuv ships almost nothing, which is what you want from the web server under Shiny
promises
promises drops R6 for plain environments and wires async work into OpenTelemetry
withr
withr rebuilt defer() on base R's own on.exit(), and got much faster for it
xml2
xml2 relicensed to MIT, then moved its hot accessors from S3 into C
See all clock alternatives → · See all htmltools alternatives →
Recent activity from clock and htmltools
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 8mo agohtmltoolsTest fix for testthat 3.3.0
- 8mo agohtmltoolscapturePlot() examples run only interactively
- 1y agoclockParsing switches to character widths; tzdb 0.5.0 required
- 1y agoclockdiff() method added for time points and calendars
- 2y agoclockInternal C++ cleanup for CRAN warnings
- 2y agohtmltoolsFill CSS moves into its own cascade layer
- 2y agohtmltoolssave_html() becomes generic; css() passes CSS variables through
- 2y agohtmltoolstagQuery() no longer errors traversing NULL on r-devel
- 3y agohtmltoolsFillable containers stop forcing overflow, respect intrinsic size
- 3y agoclockyear_week_day() calendar and spanning sequences added ⚡
- 4y agoclockZero-length sequences allowed; dependency floors raised
- 4y agoclockdate_count_between() and duration modulus arithmetic
Frequently asked questions
What is the difference between clock and htmltools?
They serve adjacent needs but don't currently overlap on shipped themes. clock and htmltools are shipping at a similar cadence (velocity 0.0 vs 0.0, both within Sparkpulse's "active" band). See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is clock better than htmltools?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. clock and htmltools are shipping at a similar cadence (velocity 0.0 vs 0.0, both within Sparkpulse's "active" band). For your specific use case, the alternatives sections above list other DevOps products to evaluate alongside.
What are the best alternatives to clock?
Top clock alternatives in DevOps are ranked by recent ship velocity. Browse the "clock alternatives" section above for the current picks, or visit /alternatives/clock-r for the full list with editorial commentary on each.
What are the best alternatives to htmltools?
Top htmltools alternatives in DevOps are ranked by recent ship velocity. Browse the "htmltools alternatives" section above for the current picks, or visit /alternatives/htmltools for the full list with editorial commentary on each.