teleren/devto huggingface dataset:
5 Ways to Instantly Optimize Your React Application
Tags: webdev, react, beginners, javascript
Published: 2023-12-24 16:05:45

If you're a React developer, you know that optimizing your application is crucial for delivering a seamless user experience. Slow applications can lead to frustrated users and increased bounce rates. In this blog post, we'll explore five practical and instantly applicable ways to optimize your React application.

## 1. Lazy Loading for Improved Initial Load Times

Lazy loading is a powerful technique that can significantly reduce your application's initial load time. Instead of loading the entire application at once, consider implementing lazy loading for components that are not immediately essential. React's built-in React.lazy() function allows you to load components only when they are needed, improving the overall performance.

```
const LazyComponent = React.lazy(() => import('./LazyComponent'));
```

## 2. Memoization for Efficient Rendering

React provides a React.memo() Higher Order Component (HOC) that memoizes the result of a component rendering. Memoization helps prevent unnecessary re-renders of components, especially when the props remain unchanged. Wrap your components withReact.memo() to enhance performance.

```
const MemoizedComponent = React.memo(MyComponent);

```
## 3. Bundle Splitting for Smaller Initial Downloads

Bundle splitting is a technique to split your JavaScript bundle into smaller chunks. This allows users to download only the code necessary for the current view, reducing the initial download size. Leverage tools like Webpack for efficient bundle-splitting configurations.

```
// webpack.config.js
module.exports = {
  //...
  optimization: {
    splitChunks: {
      chunks: 'all',
    },
  },
};
```

## 4. Use React DevTools Profiler for Identifying Bottlenecks

React DevTools Profiler is a built-in tool that helps you identify performance bottlenecks in your application. Use the profiler to understand which components are causing re-renders and consuming more resources. Addressing these issues can lead to a smoother user experience.

## 5. Implement Code Splitting with React Suspense

React Suspense is a powerful feature that enables you to achieve better user experiences by adding loading states to your components. Combining it with code splitting allows you to defer the loading of non-essential components until they are required, optimizing both load times and user interactions.

```
const OtherComponent = React.lazy(() => import('./OtherComponent'));

function MyComponent() {
  return (
    <div>
      <Suspense fallback={<div>Loading...</div>}>
        <OtherComponent />
      </Suspense>
    </div>
  );
}
```
Incorporating these five strategies into your React application can yield instant performance improvements. Remember that optimization is an ongoing process, and staying informed about the latest React features and best practices will contribute to maintaining a fast and responsive application.
Responsive Image Gallery with CSS Grid
Tags: webdev, html, css, frontend
Published: 2023-12-24 16:03:51

Responsive web design is a design method that helps the developer adjust CSS to adapt any website to any screen size available in today's world. We all know that a chameleon can change its size and shape according to the situation. Responsive web design works exactly like that. Today we are going to create a simple CSS Responsive Image Gallery that can adapt to any device from big to small. We have provided a video tutorial below for your convenience.

{% embed https://www.youtube.com/watch?v=pDDQ1Y07DUs %}

We hope you have seen the tutorial about responsive image gallery using the CSS display grid feature. If you have a collection of images that you want to display on your website.

You May Also Like:

- [Bootstrap 5 Landing Page Website](https://www.divinectorweb.com/2022/01/bootstrap-5-landing-page-template.html)
- [Eyes Follow Cursor Animation](https://www.divinectorweb.com/2023/11/eyes-follow-mouse-cursor-animation.html)
- [Rotating Cube CSS 3D Animation](https://www.divinectorweb.com/2023/11/rotating-cube-css-3d-animation.html)

You can use the CSS display grid feature to create a responsive image gallery with those images. By following this CSS technique, your images will be resized and rearranged to perfectly fit any screen size. This type of responsive image gallery can also be created with CSS Flexbox. CSS Flexbox is a one-dimensional layout system. CSS Grid is a two-dimensional layout system, providing both rows and columns, making it suitable for complex layouts.

```
<!DOCTYPE html>
<html lang="en">
<!-- divinectorweb.com -->
<head>
    <meta charset="UTF-8"> 
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Responsive Image Gallery</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <div class="wrapper">
        <img src="img/1.jpg" />
        <img src="img/2.jpg" />
        <img src="img/3.jpg" />
        <img src="img/4.jpg" />
        <img src="img/5.jpg" />
        <img src="img/6.jpg" />
        <img src="img/7.jpg" />
        <img src="img/8.jpg" />
    </div>
</body>
</html>

```

```
* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}
body {
	background: #ecf4fb;
}
.wrapper {
	width: 80%
	margin: 50px auto
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
	grid-gap: 30px;
}
.wrapper img {
	width: 100%;
	cursor: pointer
	transition: 1s ease;
}
.wrapper img:hover {
	transform: scale(0.9);
}

```

For the Original Post **[Click Here](https://www.divinectorweb.com/2023/12/css-grid-responsive-image-gallery.html)**
Task 2
Published: 2023-12-24 15:59:25

**Decision table for filling a form for doctor's appointment:**



![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/u9p9t8ayz2e17xncr7hq.png)


![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/8lj5fk7b3uqzcliy0neq.png)


**User story Example :** 
An educational app is developed, it has three roles Basic, premium and Admin. Basic users can access only Demo class videos, Premium Users can access all demo and full course videos while, Admin has access to all videos and can upload the videos on the app.


![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/7mxfzqt7eydunge2q2pt.png)
Manual Testing Task
Published: 2023-12-24 15:53:23

1. Manual Testing is the process of manually testing software for defects. The Main Purpose of Manual testing is to detect bugs and feature issues before a software application being deployed to end users.

- <u>**Benefits**:
</u>
1.Earlier identifies and fixed defects.
2.Easily Maintain and update the software.
3.It reduces cost by finding and fixes defects earlier.
4.Humans involvement is more then automated tool.  


- **Drawbacks**:
1.It is time-consuming process.
2.Inaccurate data can slow down feedback performance.
3.It does not cover all testing aspects.
4.High chances of human error.
5.It required more time to execute.
6.It required more resources to execute.  

- **<u>Example</u>**:


![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/rj7lqol7c5nvvt5zb1gy.png)

- <u>Login testcases for Online Shopping:</u>

1.Test valid username and password.
2.Test forget password and reset password functionality.
3.Validate if user is registered or not, provide an option to 
 create an account.
4.Show login screen by default for registered user.
5.Test that all fields are mandatory.
How to Solve hCaptcha Using OCR Solver
Published: 2023-12-24 15:50:47



![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/0a37ip8w1ufk2q9wh9a0.png)




**Introduction:**

hCaptcha, a widely used security measure, employs advanced challenges to distinguish between humans and bots. This article explores how OCR Captcha, an innovative solution, can efficiently tackle and overcome hCaptcha challenges, providing users with a seamless experience.

**Understanding hCaptcha Challenges:**

hCaptcha poses diverse challenges, such as image recognition, text interpretation, and more, making it a robust defense against automated bots. However, the intricate nature of these challenges can be time-consuming for users.

**Introducing OCR Captcha:**

OCR Captcha, a cutting-edge Optical Character Recognition (OCR) technology, stands out as a solution designed to decipher and solve complex captchas, including those presented by hCaptcha. Its advanced algorithms can swiftly and accurately interpret images and texts, making it an invaluable tool for users looking to streamline their online interactions.

**How to Use OCR Captcha for hCaptcha:**

**Integration Process:**
Begin by accessing the OCR Captcha platform.
Choose the hCaptcha solving option.
Follow the simple integration steps provided on the platform.
**Input API Key:**
Obtain an API key from OCR Captcha.
Input the key into the integration settings on your preferred platform.
**Solve hCaptcha Challenges:**
When faced with hCaptcha challenges on websites, OCR Captcha will automatically process and solve them in real-time.
Benefits of OCR Captcha for hCaptcha:
**Speed and Efficiency:**
OCR Captcha offers rapid solutions, minimizing the time users spend on captcha challenges.
**High Accuracy:**
The advanced OCR technology ensures precise interpretation, achieving accuracy rates of up to 99.9%.
**Seamless User Experience:**
Users can navigate websites with hCaptcha effortlessly, as OCR Captcha takes care of solving challenges in the background.

**Conclusion:**

As online security measures evolve, the integration of tools like OCR Captcha proves essential for users encountering hCaptcha challenges. By providing a swift, accurate, and user-friendly solution, OCR Captcha transforms the captcha-solving experience, ensuring a seamless journey through the digital landscape.

**[CaptchaAI uses OCR Solver](https://captchaai.com/) to effectively solve various types of captchas, including hCaptcha. This means it can swiftly and accurately handle a range of captcha challenges, providing a versatile solution for users. The Using of OCR Solver by CaptchaAI ensures a reliable and efficient approach to solving captchas of different types, enhancing the overall user experience.**
Here are ten surprising facts about cats:
Tags: cat, pet, cats, ceut
Published: 2023-12-24 15:44:02

Whisker Fatigue:
Cats use their whiskers for more than just looking cute. Whiskers are highly sensitive and can detect changes in air currents, helping cats navigate and determine if they can fit through tight spaces. However, if a cat's whiskers touch too many objects in a short period, they can experience whisker fatigue, causing discomfort or 
[READ MORE](https://sites.google.com/view/wowcrazycats/home)
How to create COPY TO CLIPBOARD BUTTON for url of webpage
Tags: css, javascript, html, immodded
Published: 2023-12-24 15:42:42

```
<button onclick="copyURL()">Copy</button>

<script>
  function copyURL() {
    var currentURL = window.location.href;
    var tempInput = document.createElement("input");
    tempInput.value = currentURL;
    document.body.appendChild(tempInput);
    tempInput.select();
    tempInput.setSelectionRange(0, 99999); 
    document.execCommand("copy");
    document.body.removeChild(tempInput);
    alert("Copied!")
  }
</script>
```
nhà cái uy tín 1-10 nhất
Published: 2023-12-24 15:37:02

Nhà Cái Uy Tín nhất 6686 Việt Nam & Thế Giới Tổng hợp 12+ Nhà Cái Uy Tín tại Việt Nam, thưởng tân binh 100% đến 6.150.000 VND: #1. 6686, #2. Fun88, #3. M88.
Thông tin liên hệ :
Công Ty : nhà cái uy tín 1-10 nhất
Địa chỉ : 04 Cao Bá Quát, Đại Phúc, Bắc Ninh, Việt Nam
Điện Thoại : (+84) 375127489
Website :     https://nhacaiuytin1-10.net/
Email :        nhacaiuytin110@gmail.com
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Exploring Grafana - A Powerful Data Visualization Tool
Published: 2023-12-24 15:32:56

**Programming Language used to create the tool:**

Grafana is primarily written in JavaScript, utilizing the AngularJS framework for the frontend and Go for the backend.

**Parent Company of the tool:**

Grafana Labs is the company behind the development and maintenance of Grafana.

**Tool Overview: Purpose and Functionality:**

Grafana is an open-source analytics and monitoring platform. It is designed to work seamlessly with various data sources, including popular databases like Prometheus, InfluxDB, and Graphite. Grafana excels in providing real-time observability and enables users to create interactive and customizable dashboards. Its rich set of features makes it a go-to choice for visualizing complex data, monitoring applications, and gaining insights into system performance.

**Logo of that tool:**

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/i25aen6b615xuyz34t5i.png)

**Whether it is open source or paid:**

Grafana is an open-source tool. Users can access and contribute to the source code on GitHub. While the core software is open source, Grafana Labs also offers additional enterprise features and support through a subscription-based model.
Here are five surprising facts about cats
Published: 2023-12-24 15:32:16

__Whisker Fatigue:
Cats use their whiskers for more than just looking cute. Whiskers are highly sensitive and can detect changes in air currents, helping cats navigate and determine if they can fit through tight spaces. However, if a cat's whiskers touch too many objects in a short period, they can experience whisker fatigue, causing discomfort or stress....
Read More [Click Here](https://sites.google.com/view/wowcrazycats/home)
Understanding JavaScript Iterables
Tags: javascript, webdev, programming, tutorial
Published: 2023-12-24 15:26:32


JavaScript Iterables play a crucial role in modern JavaScript, providing a way to traverse and manipulate data structures. In this article, we'll delve into the concept of iterables, understand how they work, and explore practical examples to solidify our understanding.

### What Are Iterables?

In JavaScript, an iterable is an object that implements the iterable protocol, allowing it to be iterated over using a loop or other constructs that require sequential access. The iterable protocol requires an object to have a method named `Symbol.iterator`.

### Example 1: Arrays as Iterables

Arrays are one of the most common iterables in JavaScript. Let's look at a simple example:

```javascript
const fruits = ['apple', 'banana', 'orange'];

for (const fruit of fruits) {
  console.log(fruit);
}
```

In this example, the `for...of` loop iterates over each element in the `fruits` array, logging each fruit to the console.

### Example 2: Custom Iterables

You can create your own custom iterables by implementing the iterable protocol. Here's an example using a custom iterable object:

```javascript
const myIterable = {
  data: [1, 2, 3],
  [Symbol.iterator]() {
    let index = 0;
    return {
      next: () => ({
        value: this.data[index++],
        done: index > this.data.length,
      }),
    };
  },
};

for (const item of myIterable) {
  console.log(item);
}
```

In this example, `myIterable` is an object with a custom iterator, allowing it to be used in a `for...of` loop.

### Example 3: Strings as Iterables

Strings are also iterable in JavaScript. Each character in a string can be iterated over individually:

```javascript
const message = 'Hello, World!';

for (const char of message) {
  console.log(char);
}
```

This loop will output each character of the string on a new line.

### Iterable Methods: forEach(), map(), filter()

Many built-in JavaScript methods work with iterables, such as `forEach()`, `map()`, and `filter()`. Here's an example using the `forEach()` method with an array:

```javascript
const numbers = [1, 2, 3, 4, 5];

numbers.forEach((num) => {
  console.log(num * 2);
});
```

### Conclusion:

Understanding [iterables](https://www.webeasly.com/javascript-iterables/) is fundamental to working effectively with data structures in JavaScript. Whether you're dealing with arrays, custom objects, or strings, leveraging iterables enhances your ability to iterate and manipulate data seamlessly. Take advantage of these examples to deepen your comprehension of JavaScript iterables and apply them in your projects for efficient data handling.
JavaScript Break and Continue Statements
Tags: javascript, webdev, programming, tutorial
Published: 2023-12-24 15:23:19


JavaScript provides two important control flow statements: `break` and `continue`. These statements offer a way to manipulate the flow of a loop, enhancing the control and efficiency of your code. In this article, we will delve into the purposes and usage of these statements, accompanied by examples to illustrate their functionality.

## The Break Statement

The `break` statement is used to terminate a loop prematurely, allowing you to exit the loop based on a certain condition. This is particularly useful when you want to stop the execution of a loop once a specific condition is met. Let's consider an example using a `for` loop:

```javascript
for (let i = 1; i <= 10; i++) {
  if (i === 5) {
    console.log("Loop interrupted at i =", i);
    break;
  }
  console.log(i);
}
```

In this example, the loop will print numbers from 1 to 4, but when `i` becomes 5, the `break` statement will be triggered, and the loop will terminate. The output will be:

```
1
2
3
4
Loop interrupted at i = 5
```

## The Continue Statement

On the other hand, the `continue` statement is used to skip the rest of the code inside a loop for the current iteration and proceed to the next iteration. This can be beneficial when you want to skip certain elements in an array or perform conditional skips within a loop. Here's an example using a `while` loop:

```javascript
let i = 0;

while (i < 5) {
  i++;
  if (i === 3) {
    console.log("Skipped at i =", i);
    continue;
  }
  console.log(i);
}
```

In this case, when `i` equals 3, the `continue` statement is triggered, and the loop skips the code below it for that iteration. The output will be:

```
1
2
Skipped at i = 3
4
5
```

## Practical Examples

Let's explore more practical scenarios. Consider a loop that iterates through an array of numbers and breaks when a specific condition is met:

```javascript
const numbers = [10, 20, 30, 40, 50];

for (let i = 0; i < numbers.length; i++) {
  if (numbers[i] === 30) {
    console.log("Condition met at index", i);
    break;
  }
  console.log(numbers[i]);
}
```

In this example, the loop will print numbers until it encounters 30 in the array. The output will be:

```
10
20
Condition met at index 2
```

In another scenario, let's use the `continue` statement to skip odd numbers in a loop:

```javascript
for (let i = 1; i <= 10; i++) {
  if (i % 2 !== 0) {
    console.log("Skipped odd number:", i);
    continue;
  }
  console.log(i);
}
```

Here, the loop prints even numbers and skips the odd ones, resulting in the output:

```
2
Skipped odd number: 3
4
Skipped odd number: 5
6
Skipped odd number: 7
8
Skipped odd number: 9
10
```

In conclusion, the [`break` and `continue` statements](https://www.webeasly.com/javascript-break-and-continue-statements/) are powerful tools in JavaScript, offering flexibility in controlling the flow of loops. Whether you need to prematurely exit a loop or skip specific iterations, these statements can greatly enhance the efficiency and readability of your code.
Exploring the Power of JavaScript While Loop
Tags: javascript, webdev, programming, tutorial
Published: 2023-12-24 15:20:30


JavaScript, one of the most versatile and widely used programming languages, offers various constructs for controlling the flow of your code. One such powerful control structure is the `while` loop, which allows you to repeatedly execute a block of code as long as a specified condition is true. In this article, we'll delve into the intricacies of the JavaScript While Loop, exploring its syntax, functionality, and providing practical examples.

### **Syntax of the While Loop:**

The basic syntax of a JavaScript While Loop is as follows:

```javascript
while (condition) {
    // Code to be executed
}
```

Here, the condition is a Boolean expression. As long as the condition evaluates to `true`, the code within the loop will be executed repeatedly. It's crucial to ensure that the condition will eventually become `false` to prevent an infinite loop.

### **Example 1: Counting from 1 to 5**

Let's start with a simple example that demonstrates the While Loop in action:

```javascript
let counter = 1;

while (counter <= 5) {
    console.log(counter);
    counter++;
}
```

In this example, the loop will execute as long as the `counter` is less than or equal to 5. It will print the current value of `counter` to the console and increment it by 1 in each iteration.

### **Example 2: User Input Validation**

While loops are handy for validating user input. Consider the following example, which prompts the user until valid input is provided:

```javascript
let userInput;

while (isNaN(userInput)) {
    userInput = prompt("Enter a number:");
}

console.log("Valid input: " + userInput);
```

Here, the loop continues to prompt the user for input until a valid number is entered. The `isNaN` function checks if the input is not a number.

### **Example 3: Generating Fibonacci Sequence**

The While Loop is also useful for generating sequences. Let's create a simple program to generate the Fibonacci sequence up to a certain limit:

```javascript
let limit = 50;
let a = 0, b = 1, temp;

while (a <= limit) {
    console.log(a);
    temp = a + b;
    a = b;
    b = temp;
}
```

This example calculates and prints Fibonacci numbers until the value of `a` exceeds the specified limit.

### **Conclusion:**

In conclusion, the [JavaScript While Loop](https://www.webeasly.com/javascript-while-loop/) is a versatile tool for repetitive tasks and conditional execution. When used carefully, it can lead to efficient and concise code. However, it's essential to ensure that the loop will eventually exit by manipulating the loop control variable or introducing a break condition.