Apple is introducing a new version of Safari meant for Web developers, and it will have some technology not found in the consumer version of Safari, The Next Web said.

Safari Technology Preview is a mix of stability with the iterative energy of WebKit nightly builds. Apple told TNW it will update Safari Technology Preview every two weeks or so, and will sign and validate each release.

With Safari Technology Preview, Web developers will get a chance to experience the latest in HTML, CSS, JavaScript and WebKit. It also syncs with iCloud data, so things like settings and bookmarks will be the same as Safari proper.

Apple has also included “the most complete implementations” of ESMAScript 6 in Safari Technology Preview, which is essentially the latest version of JavaScript. With it, developers can use object oriented principles in JavaScript iterators, APIs and code, TNW says.