Allow magic redirection filter to javascript

[antononcube]

Please, implement in the magics specifications "filter redirection" from Raku to JavaScript -- %% raku > javascript and/or %% perl6 > javascript.

(This type of specification is already available for LaTeX <-> HTML.)

For example, with this kind of specification:

%%  raku > javasript
<raku-code-that-produces-javascript-d3-code>

I can produce the plot shown here:

---

Currently, I am using this very "targeted" hack to be able to make the JavaScript D3 diagrams as the one above:

sub mime-type($str) is export {
    return do given $str {
        when /:i ^ '<svg' / {
            'image/svg+xml';
        }
        when /:i ^ '<img' / {
            'text/html';
        }
        when / ^ \s* '(function(element)' \s* '{' \s* 'require' \s* '(' \s* '[\'d3\']' \s* ',' \s* 'function(d3)'  \s* '{' / {
            'application/javascript';
        }
        default { 'text/plain' }
    }
}

---

(This request related is to related to my previous one, but as far as I can tell requires different implementation approach.)

[bduggan]

There is a #% javascript magic -- is that sufficient?

[antononcube]

There is a #% javascript magic -- is that sufficient?

No, it is not -- I am proposing Raku code (in Raku cells) that generates JavaScript code to have the results of the JavaScript code in the corresponding output cell.

[bduggan]

Okay, implemented in 075f7f5

You can now do

#% > js

for stdout to be interpreted as javascript, or

#% js

for the result to be intepreted as javascript.

[antononcube]

Thank you!
Just tried it:

(Using the package "JavaScript::D3".)

[bduggan]

cool!