How do access NODE_ENV in Nunjucks template?

user_172350 0
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I have some Nunjucks template blocks that I want to render only in certain environments. I can't seem to access the NODE_ENV variable though. I tried this:

{% if process.env.NODE_ENV === 'development' %}
  <div>rendering some stuff here</div>
{% endif %}

This didn't seem to work for me though. It didn't seem to have any idea what process.env.NODE_ENV was.

Is it possible to access an environment variable like this in a template?

nunjucks express node.js templates
2 Answers

I ended up doing the following in my app.js

nunjucks.configure('views', {
  ...
}).addGlobal('NODE_ENV', process.env.NODE_ENV)

This simply adds NODE_ENV as a globally accessible variable in my Nunjucks template.

user_1723500

You can use one of these variants:

  1. Use addGlobal to define function which returns environment

    var nunjucks  = require('nunjucks');
var env = nunjucks.configure();

env.addGlobal('$environment', () => process.env.NODE_ENV || 'development');
var res = nunjucks.renderString(`{{$environment()}}`);

console.log(res);

  2. Define $environment as global.

  3. Set res.locals.environment in middleware

    const app = express();

app.use(function (req, res, next) {
    res.locals.$environment = process.env.NODE_ENV || 'development';
    next();
});

// In nunjucks template
{{$environment}}
user_61217030
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