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Let's create a custom helper to summarize that text. Building a Custom HelperĪs you can see on the page, we have a single comment which consumes two lines. What this does is, it passes the posts from our handler to the posts parameter in the posts.hbs page file. Here, we've simply included the header.hbs file and passed a posts parameter to the posts field of the posts.hbs file. This becomes super useful when you've got complex web pages. The user won't see a difference, but our home.hbs file is much cleaner now. Now, we can configure express-handlebars as our view engine: app.engine( 'hbs', exphbs( Then, let's create an Express app: const app = express() Let's import the required libraries in our app.js file: const express = require( 'express') Ĭonst exphbs = require( 'express-handlebars') In our example we'll be using one script to keep this simple. We will add more templates and folders as we continue. The home.hbs file is an example Handlebars template that we are going to build upon. Those layouts will contain the HTML structure, style sheets, and scripts that are shared between templates. The layouts folder inside the views folder will contain the layouts or the template wrappers. The views folder contains all Handlebars templates.
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Then, let's recreate the default Handlebars directory structure. In this article we'll be focusing mostly on the templating syntax, which is why we're using express-handlebars, but in case you're handling the template compilation and rendering yourself, you'll want to check out the compilation API reference as well. Note: When using Handlebars server-side, you'll likely use a helper module like express-handlebars that integrates Handlebars with your web framework.
#HANDLEBARS ON GIRDER FRONT END INSTALL#
You can install the express and express-handlebars modules by running: $ npm install -save express express-handlebars To get started, create an empty folder, open the command prompt inside that folder, and then run npm init -y to create an empty Node.js project with default settings.īefore starting, we need to install the required Node.js libraries. Handlebars is an extension of the Mustache template language, which is mostly focused on simplicity and minimal templating. For example, the popular front-end framework Ember uses Handlebars as the templating engine. Handlebars is popular for both back-end and front-end templating. If we use a template engine in the backend to generate the HTML, we call that Server-Side Rendering (SSR). We can use template engines in both the backend and front-end. This is the work of a template engine - the template for the news feed is defined and then, based on the current user and the query to the database, the template is populated with received content. sequential posts with usernames above them), but the content will be different. For each person, the page will follow the same template (i.e. For example, on Facebook you and I will see a very different news feeds when logged in. Today, almost everyone has access to the internet. In the modern world, things are much more interactive and tailored to each user. If anything is to be changed on a page, it would have been done manually. A static web page is the same for every user and does not change on a per user basis. Most of the webpages back then were static. What is a Template Engine?īack in the '90s when the internet was introduced to the world, it was mostly used for scientific purposes such as publishing research papers and as a communication channel between universities and scientists.
#HANDLEBARS ON GIRDER FRONT END HOW TO#
Finally, we will be taking a look at how to develop a custom helper when needed. We will also discuss how to configure Handlebars with the Express.js framework and how to use built-in helpers to create dynamic pages. We'll cover what template engines are and how Handlebars can be used to create Server Side Rendered (SSR) web applications. In this article, we are going to take a look at how to use the Handlebars template engine with Node.js and Express.