/usr/lib/swipl/library/http/js_write.pl
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  • library
    • http
      • http_dispatch.pl -- Dispatch requests in the HTTP server
      • mimetype.pl -- Determine mime-type for a file
      • http_path.pl -- Abstract specification of HTTP server locations
      • http_host.pl -- Obtain public server location
      • thread_httpd.pl -- Threaded HTTP server
      • http_wrapper.pl -- Server processing of an HTTP request
      • http_header.pl -- Handling HTTP headers
      • html_write.pl -- Write HTML text
      • html_quasiquotations.pl -- HTML quasi quotations
      • http_exception.pl -- Map Prolog exceptions to HTTP errors
      • mimepack.pl -- Create a MIME message
      • http_stream.pl -- HTTP Streams
      • http_parameters.pl -- Extract parameters (GET and POST) from HTTP requests
      • http_client.pl -- HTTP client library
      • http_open.pl -- HTTP client library
      • http_multipart_plugin.pl -- Multipart form-data plugin
      • http_hook.pl -- HTTP library hooks
      • http_json.pl -- HTTP JSON Plugin module
      • json.pl -- Reading and writing JSON serialization
      • http_cors.pl -- Enable CORS: Cross-Origin Resource Sharing
      • js_write.pl -- 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
      • js_grammar.pl -- JavaScript grammar
      • http_ssl_plugin.pl -- SSL plugin for HTTP libraries
      • http_server_files.pl -- Serve files needed by modules from the server
      • hub.pl -- Manage a hub for websockets
      • websocket.pl -- WebSocket support
      • http_session.pl -- HTTP Session management
      • term_html.pl -- Represent Prolog terms as HTML
      • html_head.pl -- Automatic inclusion of CSS and scripts links
      • jquery.pl -- Provide JQuery
      • http_dyn_workers.pl -- Dynamically schedule HTTP workers.
      • http_authenticate.pl -- Authenticate HTTP connections using 401 headers
      • http_digest.pl -- HTTP Digest authentication
      • http_unix_daemon.pl -- Run SWI-Prolog HTTP server as a Unix system daemon
 javascript(+Content, +Vars, +VarDict, -DOM) is det
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.