This content originally appeared on HackerNoon and was authored by EmreKanbay
TL;DR
- The templating engine will give us the ability to use
res.render()instead ofres.send() res.engine()will decide whatres.render()will send
Start Here
We will create a directory which will contain our custom files inside. We will give it custom extension. In this tutorial, my extension will be "kanby".
Lets create our custom files in that pages folder.
\ Now its time to create our template engine.
\ First we import required packages
const express = require("express");
const fs = require("fs");
\ Then write that how you want your template engine to work
app.engine('kanby', (filePath, options, callback) => {
fs.readFile(filePath, (err, content) => {
// Error handler
if (err) return callback(err)
// process the content of file here
// you can custumize however you want
// this will change only #title# and #message#
// but you can do advenced stuff with regular expressions.
// this example is the example used in express js docs
const rendered = content.toString()
.replace('#title#', `<title>${options.title}</title>`)
.replace('#message#', `<h1>${options.message}</h1>`)
return callback(null, rendered)
})
})
\ After that, you need to define 2 more setting.
app.set('views', './pages') // specify the directory for pages
app.set('view engine', 'kanby') // register the template engine
Then you are ready !
\
You can use res.render() function to render your own files.
app.get('/', (req, res) => {
res.render('landingpage', { title: 'Hey', message: 'Hello there!' })
})
\ First it will render landingpage.kanby, the it will send rendered content to client. please do not forget to add status code
res.status(200).render();
Future Plans
This is basically an entrance for templating engine development. This is so simple.
\ In my further blogs, i am thinking to create an advanced (usable) template engine for express JS.
If you have any questions, Here is my Instagram @emrekanbay.en
This content originally appeared on HackerNoon and was authored by EmreKanbay
EmreKanbay | Sciencx (2024-10-02T15:36:20+00:00) Template Engine For Express JS. Retrieved from https://www.scien.cx/2024/10/02/template-engine-for-express-js/
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