With Prism finally moving towards v2, we finally have an opportunity to revisit the many breaking changes we've received over the years. Below are some of the changes we'll be implementing, and how.
ESMThis is by far the most important change in v2: ES modules.
In the long, long ago of 2015, when people were looking forward to wonders ES6 will bring, Prism v1.0.0 was published. The project had been developed since mid 2012 and even before then as part of Dabblet. While many things changed over the years, one of the things that stayed the same since the very beginning is Prism's complete lack of a module system.
At the time, there wasn't a standardized module system for JavaScript that worked for everything, so we made our own. The basic idea was that the one loading a component was responsible for loading its dependencies. This meant that Prism's components could be loaded with any module system or none at all. Components could even be imported in the browser with simple <script> tags.
However, this system has one problem: you can get the dependencies wrong. When components are imported in the wrong order or dependencies forgotten, you'd only get a cryptic error.
With Prism v2, component dependencies will be handled entirely by the components themselves. We will use ESM to handle all required dependencies statically and handle optional dependencies are runtime automatically. This will make importing a component as simple as importing a single file.
Since ESM isn't supported everywhere, we will offer 2 distributions: ESM and bundled. The bundle distribution of a component will be one monolithic file with all of its dependencies included.
For more information, see #2715, #2880, and #2736.
Browser supportWith our move to ESM, we are also upgrading the whole code base to use the latest ECMAScript version. The current plan is to transpile features that aren't widely supported by major browsers. Browsers and JavaScript runtimes that do not support ES6, will not be supported by Prism v2.
This means that IE11 and NodeJS 10 will no longer be supported.
For more information, see #2880, #1578 and #2457.
Public APIWe also plan a few other changes to the public API. These changes will generally make the API simpler and resolve accumulated tech debt.
For more information, see #3416, #3528, #2948, #3420, #2982, and #1844.
Build artifactsDue to the way our website works, we had to commit all build artifacts (minified files, generated files, etc.) into the repository. This is obviously a very ugly solution, but it was an easy and reliable one.
Now, we will get rid of them. One of the goals we have for Prism v2 is to get rid of all build artifacts in the repository. All build artifacts the website needs are going to be generated before it gets deployed.
Much moreThose were some of the main changes we are planning to implement for Prism v2. More topics can be found under the 2.0 milestone.
FeedbackYour feedback is welcome.
If you have questions or suggestions, please leave them under this announcement.
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