Angular Login and Signup Page | Local-Storage | angular tutorial | angular tutorial for beginners

Summary

In this Learning Partner video, the focus is on creating login and sign-up pages using Angular. The tutorial demonstrates how to utilize HTML and CSS templates from freefrontend.com, integrating them with Angular's forms module for data binding. It covers storing user data in local storage upon sign-up and checking credentials during login. The video also addresses common issues like data replication and provides solutions. The presenter guides viewers through the process, emphasizing the importance of initializing objects to avoid reference issues. The tutorial concludes with a demonstration of the login functionality, highlighting the importance of matching user credentials for successful authentication.

Takeaways

• 💻 The video demonstrates how to create a login and signup page using Angular, focusing on local storage for storing user data.
• 🔎 The template used for the login/signup page was downloaded from Google and uses HTML and CSS from freefrontend.com.
• 📋 Instead of integrating with an API, the data will be stored in the browser's local storage, specifically in an array containing user credentials.
• 📝 Two objects are created for storing the user data, one for the signup form with fields for username, email, and password, and another for the login form with username and password.
• 🔗 The video uses Angular's NG Model for two-way data binding, connecting the form fields to the objects created.
• ⚠️ The FormsModule must be imported in the app module for the NG Model to work without causing errors during compilation.
• 📦 When a user signs up, their data is pushed to an array and stored in local storage after being converted to a JSON string using `json.stringify`.
• 🔄 A common issue of repeated entries in local storage is fixed by clearing the object references after each submission.
• 🔑 During login, the user’s credentials are compared with the data in local storage. If a match is found, the user logs in successfully; otherwise, an error message is shown.
• 🔍 The video concludes by noting that this logic can be adapted for API integration instead of relying on local storage, while keeping the same core principles.

Q & A

What is the main focus of the video script?

The main focus of the video script is to demonstrate how to create login and sign-up pages using Angular, including storing user data in local storage.

Where can one find the HTML and CSS code for the login page as mentioned in the script?

The HTML and CSS code for the login page can be found on freefrontend.com, as mentioned in the script.

What is the purpose of the 'signupUsers' array in the script?

The 'signupUsers' array is used to store the user data provided during the sign-up process before saving it to local storage.

How is the sign-up form data bound to the 'signupUsers' array in Angular?

The sign-up form data is bound to the 'signupUsers' array using the 'ngModel' directive in Angular, which is linked to the form fields like username, email, and password.

What is the role of the 'FormsModule' in the Angular application discussed in the script?

The 'FormsModule' is necessary for using the 'ngModel' directive in Angular. It must be imported into the app module to enable the use of 'ngModel'.

How does the script handle the storage of user data into local storage?

The script stores user data into local storage by pushing the sign-up object into the 'signupUsers' array and then using 'localStorage.setItem' to save the array as a stringified JSON.

What is the issue faced when storing data in local storage as described in the script?

The issue faced is that the same data gets replicated in local storage. This is resolved by initializing the sign-up object before pushing it into the array.

How does the script handle the login process?

The login process involves reading the 'signupUsers' array from local storage, and then checking if the provided username and password match any record in the array.

What is the method used to read data from local storage in the script?

The method used to read data from local storage is 'localStorage.getItem', which retrieves the data associated with the specified key.

How does the script differentiate between correct and incorrect login credentials?

The script checks if a user with the provided username and password exists in the 'signupUsers' array. If a match is found, it confirms a successful login; otherwise, it shows an error for wrong credentials.

What is the suggestion for integrating with an API instead of using local storage?

The suggestion is to use the same logic for handling sign-up and login processes but instead of storing and reading from local storage, one should make API calls with the provided user input.