javascript/4

Documentation
- Reference manual
- Packages
  - SWI-Prolog HTTP support
    - The HTTP server libraries
      - library(http/js_write): Utilities for including JavaScript
        
        js_script//1
        
        javascript/4
        
        js_call//1
        
        js_new//2
        
        js_arg_list//1
        
        js_expression//1
        
        js_arg//1

Availability::- use_module(library(http/js_write)).

[det]javascript(+Content, +Vars, +VarDict, -DOM)

Quasi quotation parser for JavaScript that allows for embedding Prolog variables to substitude identifiers in the JavaScript snippet. Parameterizing a JavaScript string is achieved using the JavaScript + operator, which results in concatenation at the client side.

    ...,
    js_script({|javascript(Id, Config)||
                $(document).ready(function() {
                   $("#"+Id).tagit(Config);
                 });
               |}),
    ...

The current implementation tokenizes the JavaScript input and yields syntax errors on unterminated comments, strings, etc. No further parsing is implemented, which makes it possible to produce syntactically incorrect and partial JavaScript. Future versions are likely to include a full parser, generating syntax errors.

The parser produces a term \List, which is suitable for js_script//1 and html//1. Embedded variables are mapped to \js_expression(Var), while the remaining text is mapped to atoms.

To be done: Implement a full JavaScript parser. Users should not rely on the ability to generate partial JavaScript snippets.