In Express.js, how can I render a Jade partial-view without a “response” object?

Question

Using Express.js, I\'d like to render a partial-view from a Jade template to a variable.

Usually, you render a partial-view directly to the response object:

Answer 1

You can manually compile the Jade template.

var jade = require('jade');
var template = require('fs').readFileSync(pathToTemplate, 'utf8');
var jadeFn = jade.compile(template, { filename: pathToTemplate, pretty: true });
var renderedTemplate = jadeFn({data: 1, hello: 'world'});

Answer 2

Here's the straight solution to this problem for express 3 users (which should be widely spread now):

res.partial() has been removed but you can always use app.render() using the callback function, if the response object is not part of the current context like in Liors case:

app.render('templatePath', {
  a: 1,
  b: 2,
  c: 3
},function(err,html) {
  console.log('html',html);
  // your handling of the rendered html output goes here
});

Since app.render() is a function of the express app object it's naturally aware of the configured template engine and other settings. It behaves the same way as the specific res.render() on app.get() or other express request events.

See also:

• http://expressjs.com/api.html#app.render for app.render()
• https://github.com/visionmedia/express/wiki/Migrating-from-2.x-to-3.x for express 2.x > 3.x migration purposes