- It will run in any browser without a download or installation. (Sometime in the future, an attempt might be made to make it work in mobile browsers.)
- It will be a composition environment, a GUI builder.
- It will store its apps as web pages.
- It will compose web pages using the DOM’s interfaces and APIs39 , 40 but not SVG or Canvas drawing operations.
- Zen will allow its composition objects and simple programs to be inspected and edited via a Squeak-like object inspector.41
Zen will, by default, hide its visual programming environment. When visual programming is enabled, Zen will use HTML elements like
DIVto model nodes in the program’s abstract syntax tree (AST).42 Zen will enable these program nodes or blocks to be copied, pasted, and rearranged, just like the ordinarily visible parts of a Zen web page.
- Zen will be loadable into any web page as a library, although caution will be required to ensure compatibility.
- It will complement, augment, and interact with existing web page editors and website builders, not replace them.
- It will allow the Zen-editing of a web page to be locked, leaving intact the form and behavior it built inside the web page.
- Zen will not add more than 1–3 seconds to a web page’s TTI (time to interact).
- Zen will not follow Lively Kernel’s principle of implementing a scene graph.37 Instead, it will leverage the CSS2 visual formatting model43 and CSS3 features implemented by A-grade web browsers44 to model a document in a web browser.
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