how to use swig-extras from command line

Question

I've installed swig-extras via npm package manager, because I need new filters.

I'm compiling my templates using command-line interface

$ swig render ./index.html -j ./index.json

I try to implement truncate filter and I don't know how to change my command to implement swig-extras filters.

Answer 1

Once again I answered myself

C:\Users\[user name]\AppData\Roaming\npm\node_modules\swig\bin\swig.js

you have to add two lines

extras = require('../../swig-extras');
extras.useFilter(swig, 'truncate');

inside

var swig =