Express
Express
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1. Developing template engines for Express

Developing template engines for Express

Use the app.engine(ext, callback) method to create your own template engine. ext refers to the file extension, and callback is the template engine function, which accepts the following items as parameters: the location of the file, the options object, and the callback function.

The following code is an example of implementing a very simple template engine for rendering .ntl files.

var fs = require('fs') // this engine requires the fs module
app.engine('ntl', function (filePath, options, callback) { // define the template engine
  fs.readFile(filePath, function (err, content) {
    if (err) return callback(err)
    // this is an extremely simple template engine
    var rendered = content.toString().replace('#title#', '<title>' + options.title + '</title>')
    .replace('#message#