javascript - Sharing nunjucks filters across node and browser -

i trying find way filter works on both side.

here code have on node :

var env = nunjucks.configure(__dirname + '/../templates', {     express: app });  env.addfilter('date', function(str){     return 'ok'; }); 

and on browser side :

var env = new nunjucks.environment(); env.addfilter('date', function(str){     return 'ok'; }); 

i have filter in place available in these 2 different environments don't find solution so.

on client side using nunjucks-slim version. templates precompiled using gulp.

thanks !

you put filters in separate file/module, pass env in argument.

eg.

/** * @param env nunjucks environment */ function(env){     env.addfilter('fancy', function(input){         return 'fancy ' + input     });      env.addfilter(...);      return env; } 

you use umd wrapper (https://github.com/umdjs/umd) make compatible both browser , server. finished wrapper might this:

// custom_filters.js (function (root, factory) {     if (typeof define === 'function' && define.amd) {         // amd. register anonymous module.         define([], factory);     } else if (typeof exports === 'object') {         // node. not work strict commonjs,         // commonjs-like environments support module.exports,         // node.         module.exports = factory();     } else {         // browser globals (root window)         root.custom_filters = factory();     } }(this, function () {      // return value define module export.     return function(env){         env.addfilter('fancy', function(input){             return 'fancy ' + input         });          return env;     }; })); 

then use this:

node:

var env = nunjucks.configure(__dirname + '/../templates', {     express: app }); require('./path/to/custom_filters')(env); 

browser (globals):

var env = new nunjucks.environment(); window.custom_filters(env); 

browser (amd):

define(     ['nunjucks', 'path/to/custom_filters'],     function(nunjucks, custom_filters){         var env = new nunjucks.environment();         return custom_filters(env);     } );