tcl-duktape

Duktape is just a pair of .c/.h files, which makes the package easy to build. tcl-duktape allows you to call JavaScript code from Tcl and exposes a jsproc interface similar to the cproc interface in Critcl that allows you to write procedures in JavaScript. Included in the package is a TclOO API wrapper for tcl-duktape objects and one for JSON objects.

Sample code

#!/usr/bin/env tclsh
package require duktape
package require duktape::oo

set duktapeObj [::duktape::oo::Duktape new]
$duktapeObj jsproc ::add {{a 0 number} {b 0 number}} {
    return a + b;
}
puts [add 1 2]
$duktapeObj jsmethod cos {{deg 0 number}} {
    return Math.cos(deg * Math.PI / 180);
}
puts [$duktapeObj cos 360]
$duktapeObj destroy

Discussion

wiwo 17.02.2017: How can modules be loaded? When I try to load a JS file with require, I get "ReferenceError: identifier 'require' undefined"

dbohdan 2017-02-23: Duktape can't access the file system and thus has no Node.js-style require(). What you can do is read the module file in Tcl code and then have an interpreter instance eval it. There is an example that does this on the project wiki.

Uses

• Chess4Tcl
• JSON value extraction benchmark

See also

• LuaJIT bindings
• tcljs