Building and Publishing your Web Component in 9 Steps3 min read

Building and Publishing your Web Component in 9 Steps

This is a quick tutorial on how to build your Web Component, push it to GitHub with a demo and finally publish it to bower (optional). We will be building an upper-case tag, which will make the text-content inside it appear in upper case.

So let us get started.

If you are new to Web Components, refer Web Components – The Future Web and Web Components, PhoneGap Build and WordPress – A Hybrid App for your Blog.

Step 1 : Create a new folder where you would like to store all your Web Components. Let us call it myWebComponents and open terminal/prompt here.

Step 2 : Install the required dependencies globally. Run

Windows Mac/*nix
npm i -g bower yo generator-polymer    sudo npm i -g bower yo generator-polymer

Step 3 : Inside myWebComponents folder, create a new folder with the name of your tag (upper-case) and CD  into that folder. Now run

yo polymer

You will be asked 2 questions

Screen Shot 2014-07-04 at 10.18.25 am

Then Yeoman will scaffold the project for you. Once the components are installed, you should see a folder structure like

Screen Shot 2014-07-04 at 10.21.04 am

All the dependencies will be at the root of the project and only the custom tag related files will be inside the custom tag folder (upper-case). This way, you can author multiple tags, sharing the same dependencies. A pretty genius architecture.

Important : When you are working with your components, make changes to upper-case.html, upper-case.css and demo.html. The index.html uses a  <core-component-page></core-component-page> which is responsible for generating the index.html from the comments present inside the upper-case.html. Another genius component.

Note : Make changes to index.html only if you would like to manage the documentation yourself.

Step 4 : Make the required changes to the components. In the current case, there are two changes. Open upper-case.css and replace the contents with below

This will take care of converting the contents inside the tag to upper case.

Next open demo.html and update the custom tag to

<upper-case>this is a sample text</upper-case>

Step 5 : Test your changes. You can push the entire myWebComponents folder to a *AMP server or if you have Python installed, you can run the below command from the myWebComponents folder (not from upper-case folder).

Windows Mac/*nix

python -m http.server 

  python -m SimpleHTTPServer 

Then launch  http://localhost:8000/ and select the upper-case link

Screen Shot 2014-07-04 at 10.29.34 amThis will open the index.html page. As mentioned earlier, this will parse the comments from upper-case.html to build the page on the fly.

When you click on the demo link on the top, you should see something like

Screen Shot 2014-07-04 at 10.37.06 amSimple and sweet!

Step 6 : Push the changes to Github. Create a new repo and name it with the tag name (upper-case). Next  CD upper-case folder and run

git init

git add -A

git commit -am "Initial Version"

git remote add origin

git push origin master

This will push the code to GitHub.

Step 7 : Generate the docs, demo and push it to GitHub pages. The Polymer team has put together an awesome tool to do this for us. CD  back to myWebComponents and run

git clone git://

Next, create a temp folder inside myWebComponents folder for processing the docs, demo generation and pushing it to GitHub pages. Execute

mkdir temp && cd temp

and then run

../tools/bin/ <github-username> tag-name

In my case

../tools/bin/ arvindr21 upper-case

This will push the code to gh-pages branch of upper-case repo. You can navigate to and check the demo and docs.

You can delete the contents of the temp folder when done.

Step 8 : Tag/Version the code. To publish our awesome code to bower, we need to version the code. This version will be downloaded on the user’s machine when he runs

bower upper-case

Back to GitHub upper-case repo and click on releases, located above the source code. And then you should see the below for the first time

Screen Shot 2014-07-04 at 10.53.50 amClick on ‘Draft a new release’ And fill it up like

Screen Shot 2014-07-04 at 10.55.10 amand publish the release.

Step 9 : Publish the component to Bower (publish the component only if you think it would be helpful for others). Back to terminal/prompt, CD  into the upper-case folder and run

bower register tag-name git-repo-url.git

In my case

bower register upper-case

Bower will ask you to confirm the registration. Enter Y. And thats is it!! Your Web Component is reusable!!

Further Releases

Once you are done with the enhancements, make sure you have tested it thoroughly. Next follow the below steps to re-publish the changes to the world.

Step 1 : Update the comment docs in the tag-name.html (upper-case.html).

Step 2 : Update the demo.html

Step 3 : Push changes to GitHub

git status

git commit -am "added awesome features"

git push origin master

Step 4 : Run Step 7 from above to push the new demo to gh-pages.

Step 5 : Tag a new version. Open the release tab and create a new version (refer step 8 above) (to v.0.0.2).

Thats it!! Now when the user runs  bower upper-case , the latest version will be downloaded.

Thanks for reading! Do comment.