- #Run javascript functions inside pug template how to#
- #Run javascript functions inside pug template install#
- #Run javascript functions inside pug template generator#
- #Run javascript functions inside pug template code#
#Run javascript functions inside pug template generator#
The context of this generator is called context in Koa. The callback function is a generator, which we'll see in the next chapter. We'll learn more about middleware in the subsequent chapters. We use it to create an application and assign it to var app.Īpp.use(function) − This function is a middleware, which gets called whenever our server gets a request. We have access to its API through the variable Koa. To test this app, open your browser and go to and you should receive the following message. Save the file, go to your terminal and type.
Create a new file called app.js and type the following in it.
Once we have set up the development, it is time to start developing our first app using Koa. Now we are all ready to dive into Koa! Koa.js - Hello World
#Run javascript functions inside pug template install#
To install nodemon, use the following command. What this tool does is, it restarts our server as soon as we make a change in any of our files, otherwise we need to restart the server manually after each file modification. To make our development process a lot easier, we will install a tool from npm, nodemon. This is all we need to start development using the Koa framework. This has an advantage, the next time we need to install all the dependencies of our project, we just need to run the command npm install and it’ll find the dependencies in this file and install them for us. This flag ensures that Koa is added as a dependency to our package.json file. Tip − The -save flag can be replaced by -S flag. $ ls node_modules #(dir node_modules for windows) To confirm Koa installed correctly, run the following command. To install Koa and add it in our package.json file, use the following command. Step 3 − Now we have our package.json file set up, we’ll install Koa. Just keep pressing enter, and enter your name in the “author name” field. It’ll ask you for the following information − Step 2 − Now to create the package.json file using npm, use the following. Step 1 − Fire up your terminal/cmd, create a new folder named hello-world and cd into it − npm makes it easy for us to set up this file. Whenever we create a project using npm, we need to provide a package.json file, which has all the details about our project. To install a package locally, use the same command as above without the − g flag. A locally installed package can be used only within the directory it is installed. Locally − This method is generally used to install frameworks and libraries. To install a package globally, use the following command. Globally − This method is generally used to install development tools and CLI based packages. There are two ways to install a package using npm − globally and locally. You can browse through the list of packages available on npm at npmJS. npm allows us to access all these packages and install them locally.
#Run javascript functions inside pug template code#
The npm Registry is a public collection of packages of open-source code for Node.js, front-end web apps, mobile apps, robots, routers, and countless other needs of the JavaScript community.
#Run javascript functions inside pug template how to#
Now that we have Node and npm set up, let us understand what npm is and how to use it. Please ensure your node version is above 6.5.0. You should receive an output similar to − Confirm that node and npm are installed by running the following commands in your terminal. If you don’t already have these, head over to Node setup to install node on your local system. To get started with developing using the Koa framework, you need to have Node and npm (node package manager) installed. Mongoose is a client API for node.js which makes it easy to access our database from our Koa application. MongoDB is an open-source, document database designed for ease of development and scaling. It is one of the most popular templating language used with Koa. Pug (earlier known as Jade) is a terse language for writing HTML templates. It is built using the bleeding edge technology (ES6) which gives it an edge over older frameworks such as express. This also allows us to easily extend Koa and use it according to our needs. It is completely pluggable and has a huge community. Koa has a small footprint (600 LoC) and is a very thin layer of abstraction over the node to create server side apps. Koa can be thought of as the core of express.js without all the bells and whistles.
There are numerous modules available on npm for Koa, which can be directly plugged into it. It is a very small framework (600 LoC) which provides the required tools to build apps and is quite flexible. Koa provides a minimal interface to build applications. You need not worry about low level protocols, processes, etc. A web application framework provides you with a simple API to build websites, web apps, and backends.