The error message "TypeError: Cannot read properties of undefined (reading 'target')" means that the code is trying to access the target property of an undefined value. In this case, it seems that the event parameter passed to the toggleInfo function is undefined or null.

To resolve this error, you need to make sure that the event parameter is being properly passed to the toggleInfo function. Check where the toggleInfo function is being called and ensure that the event object is being passed correctly.

It's also possible that the error is occurring because the event listener is not properly set up for the element triggering the event. Double-check that the event listener is assigned to the correct element and that it is triggered as expected.

Without more context or the full code, it's difficult to provide a more specific solution. If you can provide more information or share more of the code, I can try to help you further troubleshoot the issue.

axios and fetch are both JavaScript libraries that are used for making HTTP requests and fetching data from a server. However, there are a few key differences between them.

1. API Design: axios is built on top of the XMLHttpRequest object, while fetch is a web API built into modern browsers. This means that axios has a more intuitive and feature-rich API, while fetch has a simpler and more modern API.

2. Browser Compatibility: axios is compatible with a wide range of browsers, including older versions, making it a good choice for projects with browser compatibility concerns. On the other hand, fetch is only supported in modern browsers, so it might not work in older browsers without polyfills.

3. Error Handling: axios has built-in support for error handling and provides more detailed error messages. fetch, on the other hand, only throws an error for network issues and does not provide specific error messages for various HTTP status codes.

4. Interceptors: axios allows you to intercept and modify requests or responses before they are sent or processed, which can be useful for tasks like authentication and request/response logging. fetch does not have built-in support for interceptors.

Here's an example of making a GET request using axios:

javascript
 
 
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axios.get('https://api.example.com/data')
  .then(response => {
    console.log(response.data);
  })
  .catch(error => {
    console.log(error);
  });

And here's an example using fetch:

javascript
 
 
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fetch('https://api.example.com/data')
  .then(response => response.json())
  .then(data => {
    console.log(data);
  })
  .catch(error => {
    console.log(error);
  });

Overall, both axios and fetch have their own strengths and weaknesses, so the choice between them depends on the specific needs of your project.

To determine if a function ran properly, you can use console.log() to print a message or a value indicating that the function ran successfully. Here's an example in JavaScript:

javascript
 
 
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function addNumbers(a, b) {
  let sum = a + b;
  console.log("The sum is " + sum);
  return sum;
}

let result = addNumbers(2, 3);

if (result) {
  console.log("The function ran properly.");
} else {
  console.log("There was an error running the function.");
}

In this example, the function addNumbers() adds two numbers and returns the sum. After calling the function and storing the result in a variable, we check if the result is truthy, which indicates that the function ran properly. If the result is falsy, we assume there was an error and print an error message.

The error you're seeing (AxiosError: Request failed with status code 401) is an error code commonly associated with an HTTP 401 "Unauthorized" status response. This means that the server you're trying to access doesn't recognize your credentials, or you need to authenticate first.

To fix the error, you can try the following troubleshooting steps:

• Double-check your request headers to make sure that your authentication credentials are correct.
• Check if you need to include an Authorization header with a valid token or API key.
• Confirm that you have the appropriate permissions to access the requested resource.

Here's an example that shows how to include an Authorization header with an Axios request in JavaScript:

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axios.get('https://example.com/api/some_resource', {
  headers: {
    'Authorization': 'Bearer ' + YOUR_ACCESS_TOKEN_HERE
  }
})
  .then(response => {
    console.log(response.data);
  })
  .catch(error => {
    console.error(error);
  });

If none of these steps work, you can check the API documentation or contact the API provider for more information.

HTML, CSS, and JavaScript code:

html
 
 
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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Pyramid ASCII Art</title>
  <style>
    #pyramid {
      font-family: monospace;
      font-size: 1.2em;
      text-align: center;
      white-space: pre;
    }
  </style>
</head>
<body>
  <label for="height">Enter the height of pyramid:</label>
  <input type="number" id="height" name="height">
  <button type="button" onclick="drawPyramid()">Draw Pyramid</button>
  <br><br>
  <pre id="pyramid"></pre>
  <script>
    function drawPyramid() {
      let height = document.getElementById("height").value;
      let pyramidStr = "";
      for (let i = 1; i <= height; i++) {
        let spaces = " ".repeat(height - i);
        let hashes = "#".repeat(i * 2 - 1);
        pyramidStr += spaces + hashes + spaces + "\n";
      }
      document.getElementById("pyramid").textContent = pyramidStr;
    }
  </script>
</body>
</html>

Explanation:

The HTML part of the code contains a label, an input field, a button, and a pre-element for displaying the pyramid. The input field is of type number, which only accepts integers as input. The pre-element has a CSS style that sets the font family to monospace, the font size to 1.2em, and the white-space property to pre so that it displays the pyramid as a monospace text element.

In the JavaScript code, the function drawPyramid() is called when the button is clicked. It reads the input value and loops through the range from 1 to the input value. For each loop iteration, it creates two strings: spaces and hashes. The spaces string contains the required number of spaces on the left and right of the pyramid, and the hashes string contains the required number of hash characters for each level of the pyramid. These strings are concatenated and a newline character is added, and the resulting string is stored in the pyramidStr variable. Finally, the pyramidStr is assigned to the text content of the pre-element to display the pyramid.

Note: The code assumes that the user only inputs integer values. It does not include any input validation or error handling.