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ladjs/consolidate: Template engine consolidation library for node.js

Modern and maintained fork of the template engine consolidation library. Maintained and supported by Forward Email https://forwardemail.net, the 100% open-source and privacy-focused email service.

NOTE: This package @ladjs/consolidate also mirrors to consolidate on npm, however you should upgrade to @ladjs/consolidate as we may deprecate consolidate in the future.

npm install @ladjs/consolidate

Some package has the same key name, @ladjs/consolidate will load them according to the order number. By example for dust, @ladjs/consolidate will try to use in this order: dust, dustjs-helpers and dustjs-linkedin. If dust is installed, dustjs-linkedin will not be used by @ladjs/consolidate.

NOTE: you must still install the engines you wish to use, add them to your package.json dependencies.

All templates supported by this library may be rendered using the signature (path[, locals], callback) as shown below, which happens to be the signature that Express supports so any of these engines may be used within Express.

NOTE: All this example code uses cons.swig for the swig template engine. Replace swig with whatever templating you are using. For example, use cons.hogan for hogan.js, cons.pug for pug, etc. console.log(cons) for the full list of identifiers.

const cons = require('@ladjs/consolidate');

cons.swig('views/page.html', { user: 'tobi' }, function(err, html) {
  if (err) throw err;
  console.log(html);
});

Or without options / local variables:

const cons = require('@ladjs/consolidate');

cons.swig('views/page.html', function(err, html) {
  if (err) throw err;
  console.log(html);
});

To dynamically pass the engine, simply use the subscript operator and a variable:

const cons = require('@ladjs/consolidate');

const name = 'swig';

cons[name]('views/page.html', { user: 'tobi' }, function(err, html) {
  if (err) throw err;
  console.log(html);
});

Additionally, all templates optionally return a promise if no callback function is provided. The promise represents the eventual result of the template function which will either resolve to a string, compiled from the template, or be rejected. Promises expose a then method which registers callbacks to receive the promise's eventual value and a catch method which the reason why the promise could not be fulfilled. Promises allow more synchronous-like code structure and solve issues like race conditions.

const cons = require('@ladjs/consolidate');

cons.swig('views/page.html', { user: 'tobi' })
  .then(console.log)
  .catch(console.error);
const cons = require('@ladjs/consolidate');

const html = await cons.swig('views/page.html', { user: 'tobi' });
console.log(html);

To enable caching simply pass { cache: true }. Engines may use this option to cache things reading the file contents, compiled Functions etc. Engines which do not support this may simply ignore it. All engines that consolidate implements I/O for will cache the file contents, ideal for production environments. When using consolidate directly: cons.swig('views/page.html', { user: 'tobi', cache: true }, callback); Using supported Express versions: app.locals.cache = true or set NODE_ENV to "production" and Express will do this for you.

const express = require('express');
const cons = require('@ladjs/consolidate');
const app = express();

// assign the swig engine to .html files
app.engine('html', cons.swig);

// set .html as the default extension
app.set('view engine', 'html');
app.set('views', __dirname + '/views');

const users = [];
users.push({ name: 'tobi' });
users.push({ name: 'loki' });
users.push({ name: 'jane' });

app.get('/', function(req, res) {
  res.render('index', {
    title: '@ladjs/consolidate'
  });
});

app.get('/users', function(req, res) {
  res.render('users', {
    title: 'Users',
    users: users
  });
});

app.listen(3000);
console.log('Express server listening on port 3000');
Template Engine Instances

Template engines are exposed via the cons.requires object, but they are not instantiated until you've called the cons[engine].render() method. You can instantiate them manually beforehand if you want to add filters, globals, mixins, or other engine features.

const cons = require('@ladjs/consolidate');
const nunjucks = require('nunjucks');

// add nunjucks to requires so filters can be
// added and the same instance will be used inside the render method
cons.requires.nunjucks = nunjucks.configure();

cons.requires.nunjucks.addFilter('foo', function() {
  return 'bar';
});

MIT © TJ Holowaychuk


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