How To Install And Set up Polymer 3.0 On macOS X

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How To Install And Set up Polymer 3.0 On macOS X

The polymer is an open-source JavaScript library for building web applications using web components. It is created by Google and it allows repeated usage of HTML elements if the developer wants to create web applications with its components. In this article the important topics are covered which is needed for understanding the CLI and understand the functionality of the tool. But first of all, we need to learn a bit about web components.

Web components are nothing but reusable components were each of the components contains some custom elements, HTML imports, and a template. If you are familiar in using ReactAngular, etc. then you are already using web components. Components in React are really web components. Similarly, Angular directives can be considered as a web component.

One of the most attractive features of Polymer is that it allows the developers to create their customized version of the elements by using CSS, HTML HTML, and JavaScript for adding features in the element.

It also provides polyfill which enables implementing a feature on the web browsers that do not support it.

It uses Google material design for developing a mobile application which is hybrid in nature. The HTML import and the custom element present in can be used fiber uses and the custom elements are distributed across the entire network.



Installation

So we can learn the steps in installing Polymer.js on macOS X

1. Install and Update Homebrew

Homebrew is a popular package manager for macOS. We can install all the packages and dependencies required to install Angular using Homebrew. So at first, we need to install it on our system.

To install Homebrew, open the Terminal and run the command below.

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

So we have installed Homebrew on our system successfully and now we need to update it so that we can get the latest version of packages available on HomeBrew.

brew update

2. Install Nodejs

Node.js actually provides a runtime environment to execute JavaScript code from outside a browser. NPM, the default package manager for Nodejs is used for managing and sharing the packages for any JavaScript projects. Node.js and NPM are used by Angular for the management of dependencies and runtime.

In this tutorial, we are going to install Angular CLI using the Node Package Manager(NPM). So first, it needs to install Nodejs on our system. NPM will be installed with Nodejs itself.

Nodejs can be installed on our system using brew.

brew install node

Alternative method

Alternatively, we can download and install Nodejs from the official website. If so, it does not need Homebrew to be installed on our system.

Currently, 12.7.0 is the latest version of Nodejs and it can be downloaded and installed on our system using the URL below.

 https://nodejs.org/en/download/current/ 

Select the macOS installer option and download the node-v12.7.0.pkg file. Then install it on our system.

3. Install Git

It requires to install Git on our system because, on step 5, we need to clone the starting code for our first polymer project from Github.

Git can be installed on our system using brew.

brew install git

Alternative method

Alternatively, we can download and install Nodejs from the official website. If so, it does not need Homebrew to be installed on our system.

https://git-scm.com/download/mac 

It will download the git-2.22.0-intel-universal-mavericks.dmg file. Just install it.

4. Install Polymer CLI

Polymer CLI helps us to create projects, generate application and library code, and perform a variety of ongoing development tasks such as testing, bundling, and deployment.

The main components of Polymer CLI are a boilerplate generator, build pipeline, a test runner, a linter and a development center.

Polymer CLI It can simply be installed using NPM.

npm install -g polymer-cli

5. Clone the Starting Code

Now we need to download a starting code from Github to create our first application using Polymer. We can easily clone this project using git.

 git clone https://github.com/PolymerLabs/polymer-3-first-element.git

6. Install Dependencies for the Starting Code

So we have cloned the starting project from Github and we need to install the dependencies required for it. It can be done with NPM.

cd polymer-3-first-element
npm install

7. Running the App

Now, the app we have cloned can be run from our system.

polymer serve --open

This will open up a new browser tab on our system with the below URL.

http://localhost:8081/demo

It is our Polymer project and we can customize it in our ways.

Have a nice code !

Hi, I'm Syamlal, the co-founder of Redmonark. I'm a developer, writer and also have a little bit of experience in graphic designing.
Website https://syam.me

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