pseudo-elements are used to style specific parts of an element. They begin with a double colon (::) followed by the name of the pseudo-element

Useful VS Code Extensions

Preventing SQL injection attacks in Node.js

SQL injection is a malicious attack where nefarious SQL code is injected into a system, exposing sensitive information, corrupting or deleting data, and sometimes, granting unauthorized access to attackers. Addressing this threat is difficult, and it emphasizes the need to ensure the security of your Node.js applications.

In this article, you'll learn more about why SQL injection attacks pose a significant threat and how to shield your Node.js applications against them.

To better understand how SQL injection works, let's quickly create a vulnerable app using Node.js, Express, and a PostgreSQL database. The application takes user input from a form, constructs a SQL query, and executes it against the database to fetch some data.

Start by downloading and installing Node.js on your machine. Node.js is the runtime environment that executes your JavaScript code server-side.

Read More

#node #sql #nodejs
➖➖➖➖➖➖➖➖➖➖➖➖➖➖
👉Join @bigdataspecialist for more👈

Useful VS Code Extensions

CSS Tip💡

:empty pseudo selector is used to target elements with no children, including text nodes.

WebServices testing (RestSharp + Postman) Complete Guide

2 in 1! Learn API testing from zero and build Test Automation with minimum toolset: C#, NUnit, RestSharp, Newtonsoft

Rating ⭐️: 4.2 out 5
Students 👨‍🎓 : 25,147
Duration ⏰ : 10.5 hours on-demand video
🧮 2 exercises
📜 1 article
Created by 👨‍🏫: Learn IT University

🔗 COURSE LINK

⚠️ Its free for first 1000 enrollments only!


#web # postman #programming
➖➖➖➖➖➖➖➖➖➖➖➖➖➖
👉Join @bigdataspecialist for more👈

A. Type error
The 'getFullName' will not be accessible in member. As it is defined on the constructor Person. In order to make it work, we need to make 'Person.getFullName' to 'Person.prototype.getFullName', which will make the getFullName available in all instance of Person.

JavaScript. js Explained

Laravel Tip 🚀

You can use the incrementEach() and decrementEach() methods to increment and decrement multiple columns with a single query.

What does API Gateway do?

25 Javanoscript path files used to store sensitive information in Web Application:-

1. /js/config.js
2. /js/credentials.js
3. /js/secrets.js
4. /js/keys.js
5. /js/password.js
6. /js/api_keys.js
7. /js/auth_tokens.js
8. /js/access_tokens.js
9./js/sessions.js
10. /js/authorization.js
11. /js/encryption.js 12. /js/certificates.js
13. /js/ssl_keys.js
14. /js/passphrases.js
15. /js/policies.js
16./js/permissions.js
17. /js/privileges.js
18. /js/hashes.js
19. /js/salts.js
20. /js/nonces.js
21. js/signatures.js
22. js/digests.js
23. js/tokens.js
24. js/cookies.js
25. /js/topsecr3tdonotlook.js

JavaScript Tip💡

You can remove whitespace from both ends of a string using the trim() method.

CSS Tip💡

You can change the default color of text selection on your web page like this

💡Javanoscript tip!

You can rename a property of an existing object. Here's how:

Structured way to learn JavaScript:

EASY

- What is JavaScript and its role in web development?
- Brief history and evolution of JavaScript.
- Basic syntax and structure of JavaScript code.
- Understanding variables, constants, and their declaration.
- Data types: numbers, strings, boolean, and null/undefined.
- Arithmetic, assignment, comparison, and logical operators.
- Combining operators to create expressions.
- Conditional statements (if, else if, else) for decision making.
- Loops (for, while) for repetitive tasks.
- Switch statements for multiple conditional cases.

MEDIUM:

- Defining functions, including parameters and return values.
- Function scope, closures, and their practical applications.
- Creating and manipulating arrays.
- Working with objects, properties, and methods.
- Iterating through arrays and objects.
- Understanding the Document Object Model (DOM).
- Selecting and modifying HTML elements with JavaScript.
- Handling events (click, submit, etc.) with event listeners.
- Using try-catch blocks to handle exceptions.
- Common error types and debugging techniques.

HARD:

- Callback functions and their limitations.
- Dealing with asynchronous operations, such as AJAX requests.
- Promises for handling asynchronous operations.
- Async/await for cleaner asynchronous code.
- Arrow functions for concise function syntax.
- Template literals for flexible string interpolation.
- Destructuring for unpacking values from arrays and objects.
- Spread/rest operators.
- Design Patterns
- Writing unit tests with testing frameworks.
- Code optimization techniques.

Learning JavaScript in this structured way is like building a strong foundation before diving into any fancy frameworks. These topics are like the building blocks of JavaScript, and they'll help you feel confident in your skills.
But remember, there's no one-size-fits-all approach to understanding JavaScript. I might have missed some important concepts along the way. So, if you think there's something crucial that I didn't cover, please feel free to mention it. Your input is valuable!