Angular forms

From my point of view,

If you have more than two inputs in an form, don’t use template driven forms.

When we are going with template driven forms for large forms, we will end up dealing with potential bugs.

So what should I use?

Just check.

What is Reactive forms?

Building forms with Functional Reactive Programming will help us to build feature like undo/redo quickly.

Handling various validation is quickly doable.

We can have features like partially update the form or fully update the form.

FormGroup have api methods called

patchValue() – partially update form

setValue() – fully updates the form (required all form fields)

You don’t have to set all fields to empty. The following single line will does that for you this.form.reset();

Your form gets to its initial state in one line of code.

Even we can mix up both the techniques in building forms.

That’s technically possible.

I personally wish to use it seperately.

Moral of story

If you are building new forms in your application.

USE reactive form..

How to deploy angular app on GitHub Pages for free

In this blog post, we are going to discuss about “how we can deploy an angular app on GitHub Pages for free”

To discuss further, lets create a angular application using the Angular CLI. You can checkout one of our detailed post on how to create angular app using CLI here.

Create an angular application using angular CLI

The flow is we are going to generate an angular app using angular CLI. The CLI will generate us a sample application and we will push that boilerplate into GitHub with a new repo.

And then we will look into the steps to deploy that application in github pages.

Create GitHub Repository

I’m going to create an repository with a name “angular-hosting-demo”

Github Repo

Once I create repo, I’m going to push all codes here.

https://github.com/PandiyanCool/angular-hosting-demo

New application using Angular CLI

By generating following after installing all the necessary tools.

ng new <name> [options]

ng new angular-hosting-demo

It will generate an application with following folder structure.

File structure

Verify whether application is building and showing output using following command

ng serve

And it will show us the following output

localhost app

Now into action

For this we are going to install an npm package.

https://www.npmjs.com/package/angular-cli-ghpages

Add angular-cli-ghpages to your project

Run the following command to add angular-cli-ghpages

ng add angular-cli-ghpages

You have run the above from the home directory or root directory of your project.

It will update the angular.json file in your repository.

Now commit all your changes to remote branch.

Deploy your project to GitHub pages

Deploy your project to GitHub pages with all default settings. Your project will be automatically built in production mode.

ng deploy --base-href=/<repositoryname>/

Please be aware of the –base-href option. It is necessary when your project will be deployed to a non-root folder.

In our case, we will run the following command to deploy the application with repo name as bas-href value

ng deploy --base-href=angular-hosting-demo

And this built code will uploaded into separate branch called gh-pages

https://github.com/PandiyanCool/angular-hosting-demo/tree/gh-pages

And it will have runtime files as below

deployed code

And base-href would have details of repository name

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>AngularHostingDemo</title>
  <base href="angular-hosting-demo">  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="icon" type="image/x-icon" href="favicon.ico">
<link rel="stylesheet" href="styles.09e2c710755c8867a460.css"></head>
<body>
  <app-root></app-root>
<script src="runtime-es2015.0dae8cbc97194c7caed4.js" type="module"></script><script src="runtime-es5.0dae8cbc97194c7caed4.js" nomodule defer></script><script src="polyfills-es5.177e85a9724683782539.js" nomodule defer></script><script src="polyfills-es2015.f332a089ad1600448873.js" type="module"></script><script src="main-es2015.48f00976eb36d615f1e8.js" type="module"></script><script src="main-es5.48f00976eb36d615f1e8.js" nomodule defer></script></body>
</html>

https://github.com/PandiyanCool/angular-hosting-demo/blob/gh-pages/index.html

Access deployed site

To get the URL, you can visit the settings page. It will provide the details of hosted application under github pages tab

Now, we can access the deployed site in the following URL

https://pandiyancool.github.io/angular-hosting-demo/

Thats it!

Give it a try, and leave your feedbacks in comment section below.