Zenon Page Templates - JS (ZPT-JS) is a Javascript API that makes it easy to modify the DOM of a HTML document with no Javascript programming, using only some custom attributes. ZPT-JS is a javascript implementation of Zope Page Templates (ZPT). It is not a fully compliant implementation: there are some differences. Take a look at Zope2 book to learn about Zope Page Templates.

Core features of ZPT-JS are:

• Easy to learn; clean, simple and consistent syntax.
• A rich and powerful group of expressions available (string, query, logical, math, arrays, lists, ranges, function, method expressions...).
• Don't break HTML! The HTML documents using ZPT-JS are valid HTML documents.
• Makes it easy to designers maintain pages without having to abandon their tools.
• Internal macro support; external asynchronous macro loading support.
• I18n and L10n support using standards (Intl and ICU). External asynchronous i18n files loading support.

ZPT-JS is based on ZPT but it does not implement it at 100%: there are some important differences between ZPT-JS and ZPT.

Using ZPT we have:

• the ZPT template (a HTML file with the ZPT tags inside)
• the data
• the final HTML file (the ZPT template combined with the data)

Using ZPT-JS:

• the ZPT template (a HTML file with the ZPT tags inside)
• the data
• the final HTML file is the ZPT template! The DOM of the HTML page is modified depending on the tags in the ZPT template.

A main goal of ZPT-JS is not to break a valid HTML document. So, as HTML5 allows, instead of using TAL attributes ZPT-JS uses data attributes. This way tal:content attribute is replaced by data-content. However, ZPT-JS also supports standard TAL attributes (invoking zpt.context.useOriginalTags()).

ZPT-JS is registered as a package on npm. This is the recomended way of downloading it. You can install the latest version of ZPT-JS and its dependencies with the npm CLI command:

npm install zpt

Take a look at ZPT-JS's home page for more details.

LGPL