FAQ and Common Issues

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FAQ and Common Issues

How Do I Deploy My Encore Assets?

There are two important things to remember when deploying your assets.

1) Compile Assets for Production

Optimize your assets for production by running:

$ ./node_modules/.bin/encore production

That will minify your assets and make other performance optimizations. Yay!

But, what server should you run this command on? That depends on how you deploy. For example, you could execute this locally (or on a build server), and use rsync or something else to transfer the generated files to your production server. Or, you could put your files on your production server first (e.g. via git pull) and then run this command on production (ideally, before traffic hits your code). In this case, you'll need to install Node.js on your production server.

2) Only Deploy the Built Assets

The only files that need to be deployed to your production servers are the final, built assets (e.g. the public/build directory). You do not need to install Node.js, deploy webpack.config.js, the node_modules directory or even your source asset files, unless you plan on running encore production on your production machine. Once your assets are built, these are the only thing that need to live on the production server.

Do I Need to Install Node.js on My Production Server?

No, unless you plan to build your production assets on your production server, which is not recommended. See How Do I Deploy my Encore Assets?.

What Files Should I Commit to git? And which Should I Ignore?

You should commit all of your files to git, except for the node_modules/ directory and the built files. Your .gitignore file should include:

# whatever path you're passing to Encore.setOutputPath()

You should commit all of your source asset files, package.json and yarn.lock.

My App Lives under a Subdirectory

If your app does not live at the root of your web server (i.e. it lives under a subdirectory, like /myAppSubdir), you need to configure that when calling Encore.setPublicPrefix():

// webpack.config.js
    // ...


-     .setPublicPath('/build')
+     // this is your *true* public path
+     .setPublicPath('/myAppSubdir/build')

+     // this is now needed so that your manifest.json keys are still `build/foo.js`
+     // (which is a file that's used by Symfony's asset function)
+     .setManifestKeyPrefix('build')

If you're using the encore_entry_script_tags() and encore_entry_link_tags() Twig shortcuts (or are processing your assets through entrypoints.json in some other way) you're done! These shortcut methods read from an entrypoints.json file that will now contain the subdirectory.

"jQuery is not defined" or "$ is not defined"

This error happens when your code (or some library that you are using) expects $ or jQuery to be a global variable. But, when you use Webpack and require('jquery'), no global variables are set.

The fix depends on if the error is happening in your code or inside some third-party code that you're using. See jQuery Plugins and Legacy Applications for the fix.

Uncaught ReferenceError: webpackJsonp is not defined

If you get this error, it's probably because you've forgotten to add a script tag for the runtime.js file that contains Webpack's runtime. If you're using the encore_entry_script_tags() Twig function, this should never happen: the file script tag is rendered automatically.

This dependency was not found: some-module in ./path/to/file.js

Usually, after you install a package via yarn, you can require / import it to use it. For example, after running yarn add respond.js, you try to require that module:


But, instead of working, you see an error:

This dependency was not found:

  • respond.js in ./assets/js/app.js

Typically, a package will "advertise" its "main" file by adding a main key to its package.json. But sometimes, old libraries won't have this. Instead, you'll need to specifically require the file you need. In this case, the file you should use is located at node_modules/respond.js/dest/respond.src.js. You can require this via:

// require a non-minified file whenever possible

I need to execute Babel on a third-party Module

For performance, Encore does not process libraries inside node_modules/ through Babel. But, you can change that via the configureBabel() method. See Configuring Babel for details.

This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.