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New JS API Release Candidate is Live
Posted 21 November 2021 by Natalie Weizenbaum
Because this is such a substantial addition, we want to give users a chance to kick the tires a bit before we set it in stone, so we’ve released it as a release candidate in Dart Sass 1.45.0-rc.1. Download it, try it out, and let us know what you think by filing issues or sending us a tweet. Unless major changes are necessary, we plan to make a stable release some time next week.
How to use it permalinkHow to use it permalink How to use it permalinkHow to use it
The new API comes with four new entrypoint functions:
compileAsync() take Sass file paths and return the result of compiling them to CSS, while
compileStringAsync() take a string of Sass source and compile it to CSS. Unlike the old API, the async functions all return
Request for Comments: New JS API
Posted 5 August 2021 by Natalie Weizenbaum
The API has four main components, all of which I’ll cover in this post:
As you read on, remember that this API is still just a proposal. We want to hear from you, our users, whether it meets your needs and how we can improve it before we lock it in to a full release. So go ahead and make your voices known on the issue tracker!
Why a New API? permalinkWhy a New API? permalink Why a New API? permalinkWhy a New API?
node-sass package, which wrapped the now-deprecated
The Discontinuation of node-fibers
Posted 26 March 2021 by Natalie Weizenbaum
We have recently received the unfortunate but not entirely surprising news that the
node-fibers to improve the performance of the asynchronous
render() method, but going forward this will unfortunately no longer be an option in Node 16 and on.
There are a number of alternative options for reclaiming this lost performance, some of them which are available today, some which are in development, and some which are theoretical but could be made real with pull requests from users like you. Sadly, none of the options that are ready today are drop-in solutions with the same level of ease-of-use as
node-fibers, so if that performance is crucial to you we recommend staying on Node 14 for the time being.
What Happened? permalinkWhat Happened? permalink What Happened? permalinkWhat Happened?
In order to understand how we got here, it’s important to know two pieces of history…
Request for Comments: First-Class Calc
Posted 15 March 2021 by Natalie Weizenbaum
One of the absolutely most-requested features in Sass is the ability to more easily work with
calc() expressions. These expressions have historically been parsed opaquely: between the parentheses, you can put any text at all, and Sass will just treat it as an unquoted string. This has simplified Sass’s parser, since we don’t have to support the specific
calc() microsyntax, and it’s meant that we automatically support new features like the use of CSS variables within
However, it comes at a substantial usability cost as well. Because each
calc() is totally opaque to Sass’s parser, users can’t simply use Sass variables in place of values; they have to interpolate variables explicitly. And once a
calc() expression has been created, there’s no way to manipulate it with Sass the way you can manipulate a plain number.
We’re looking to change that with a new proposal we call “First-Class Calc”. This proposal changes
calc() (and other supported mathematical functions) from being parsed…
LibSass is Deprecated
Posted 26 October 2020 by Natalie Weizenbaum
After much discussion among the Sass core team, we’ve come to the conclusion that it’s time to officially declare that LibSass and the packages built on top of it, including Node Sass, are deprecated. For several years now, it’s been clear that there’s simply not enough engineering bandwidth behind LibSass to keep it up-to-date with the latest developments in the Sass language (for example, the most recent new language feature was added in November 2018). As much as we’ve hoped to see this pattern turn around, even the excellent work of long-time LibSass contributors Michael Mifsud and Marcel Greter couldn’t keep up with the fast pace of language development in both CSS and Sass.
I’ll go into detail about what this means below, but here are the major points:
We no longer recommend LibSass for new Sass projects. Use Dart Sass instead.
We recommend all existing LibSass users make plans to eventually move onto Dart Sass, and that all Sass libraries make plans to eventually drop support…