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Editorial Team
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Asked: 2026-05-28T15:51:41+00:00

I have a rails-backbone project that generates jst.ejs templates. I’d like to include some

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I have a rails-backbone project that generates jst.ejs templates.

I’d like to include some view helpers within there, but I’m having a helluva time figuring out how to include either EJS or JST functions into that template file. If anyone could offer a very quick explanation of how to include a very basic function so that it can be read by an ejs.jst template I’d be very appreciative.

I’ve tried hacking into JST & EJS, plus just using bare javascript functions, but nothing is bringing any joy. Example attempt below:

Example:

# helpers.js.coffee
console.log('yes, this file is being called from the app')
helloWorld: () ->
  console.log "Hello, world!"

# app/assets/javascripts/backbone/templates/project/new.jst.ejs
<%= helloWorld() %>

(Returns uncaught referenceError)

Any ideas appreciated. Cheers.

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1 Answer

  1. Editorial Team

    You might need to attach that to window, since coffeescript puts closures () around each .coffee file. A good example of how to deal with scoping issues is any popular js/coffee utility, like underscore.js. He uses var root = this and exports to conform to CommonJS practices and get his _ function out into the world where it can be used globally.

    The book CoffeeScript: Accelerated JavaScript Development has a chapter (chapter 4) on this very topic, as well as it’s just a damn good book on CoffeeScript. It explains a lot of where the modern world is at javascript-wise.

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