Inspired by hbsfy and based on it source code.

Transform handlebars AST and add support of require helper for browserify/webpack automatic injection;

npm install --save-dev injectify

Use it as Browserify transform module with -t:

browserify -t injectify main.js > bundle.js

If you prefer gulp:

var gulp = require("gulp"),
    browserify = require("browserify"),
    source = require("vinyl-source-stream"),
    
gulp.task('js', function () {
    var bundleStream = browserify('./src/main.js')
        .transform(require("injectify"))
        .bundle();

    return bundleStream
        .pipe(source('main.js'))
        .pipe(gulp.dest('dist'));
});

Configure webpack

{
    "module": {
        "loaders": [
            {"test": /\.hbs/, "loader": "injectify"}
        ]
    }
}

In file ./src/main.js require injectify require helper:

require("injectify/require");

Now you can use require helper in your templates:

Simple require some module with string export: 

{{require "../string-module"}}

Pass require result as param to another helper: 

{{formatUser (require "../user-module")}}

Pass require result as hash param to another helper: 

{{formatUser user=(require "../user-module")}}

require helper works like original browserify. You can require modules relative to template file or node_modules directory

Relative require {{require "../utils/strange-module"}} 

or globally defined {{require "my-utils"}}

• Include helper - allow include templates like partials, but with browserify
• View helper - allow render marionette view direct to template

• Handlebars 4.0 support