How to use in expressjs?

[rafis]

How to use in expressjs? I have type "expressjs pithy" in google - no results.

[derhuerst]

I can show you my web app as an example.

The /departures route requires the departures template`, which just exports a function, that takes data and returns an HTML string.

Probably not the easiest example, but I hope it helps you.

[rafis]

I mean Express 'view engine'. Something like this:

exports.__express = function(path, options, callback) {
    var html;
    try {
        var template = require(path);
        html = template.call(options).toString();
    } catch(e) {
        callback(e);
        return;
    }
    callback(null, html);
};

And views/index.pithy:

var html = require('pithy');
module.exports = function() {
    return html.html(null, [
        html.head(null, [
            html.title(null, this.title)
        ]),
        html.body(null, this.text)
    ]);
};

Usage in route action:

function(req, res, next) {
    res.render('views/index.pithy', { title: 'Title', text: 'Hello, World!' });
}

[derhuerst]

I mean Express 'view engine'.

As the documentation says, those template engines are just a function taking 3 arguments:

• the template name/file,
• an object filled with data to be used by the template,
• a callback to be called with the rendered HTML.

Something like this might work with pithy:

const p = require('pithy')

const templates = {
    // minimal working example
    main: (data) => p.html(null, [
        p.body(null, [
            p.h1(null, data.title),
            p.p(null, data.message)
        ])
    ])
    // …
}

app.engine('unicorn', (template, data, cb) => {
    if (!(template in templates))
        return cb(new Error('unknwon template'))
    return cb(null, templates[template](data))
})

app.set('view engine', 'unicorn')