function getUrlParams() {
  const params = new URLSearchParams(window.location.search);
  const urlParams = {};
  for (const [key, value] of params.entries()) {
    urlParams[key] = value;
  }
  return urlParams;
}
async function getSharePointListFields(listId) {
  const apiUrl = `${_spPageContextInfo.webAbsoluteUrl}/_api/web/lists(guid'${listId}')/fields?$select=InternalName&$orderby=InternalName&$filter=Hidden eq false`;

  try {
    const response = await fetch(apiUrl, {
      method: 'GET',
      headers: {
        'Accept': 'application/json;odata=verbose',
        'Content-Type': 'application/json;odata=verbose',
      },
      credentials: 'include', // Include credentials for authenticated requests
    });

    if (!response.ok) {
      throw new Error('Network response was not ok');
    }

    const data = await response.json();
    return data.d.results;
  } catch (error) {
    console.error('Error fetching SharePoint list fields:', error);
    return [];
  }
}
// Usage
const urlParams = getUrlParams();
const listId = urlParams.List;
window.Fields = "";
if (listId) {
  getSharePointListFields(listId).then((fields) => {
    console.log('SharePoint List Fields:', fields);
    // Process the fields as needed
	fields.map((f) => {
	window.Fields += `${f.InternalName}\n`;
		
	});
    console.log(window.Fields);
  });
} else {
  console.error('List ID not found in URL parameters');
}

Understanding Regular Expressions (RegEX) in JavaScript

Regular expressions (RegEX) in JavaScript are a powerful tool for searching and manipulating strings. They allow you to define complex search patterns and apply them to text strings. Here is a detailed explanation of how they work:

1. Creating a Regular Expression

In JavaScript, you can create a regular expression in two ways:

• Literal: Using slashes /.
• RegExp Object: Using the RegExp constructor.

Literal Example:

let regex = /pattern/;

RegExp Object Example:

let regex = new RegExp("pattern");

2. Using Regular Expressions

Regular expressions can be used with several string methods and RegExp object methods.

String Methods:

• search(): Searches for a match and returns the index of the first occurrence.
• match(): Searches for all matches and returns an array of results.
• replace(): Replaces matches with another string.
• split(): Splits a string into an array based on matches.

RegExp Object Methods:

• test(): Checks if a string contains a match.
• exec(): Searches for a match and returns an array of information about the match.

3. Practical Examples

Search for a Match:

let str = "Hello, world!"; let regex = /world/; let result = str.search(regex); // Returns 7

Find All Matches:

let str = "Hello, world! Hello, everyone!"; 
let regex = /Hello/g; // The 'g' flag means global, to find all occurrences 
let result = str.match(regex); // Returns ["Hello", "Hello"] 

Replace Matches:

let str = "Hello, world!"; let regex = /world/; let result = str.replace(regex, "universe"); // Returns "Hello, universe!"

Split a String:

let str = "one,two,three"; let regex = /,/; let result = str.split(regex); // Returns ["one", "two", "three"]

Test for a Match:

let str = "Hello, world!"; let regex = /world/; let result = regex.test(str); // Returns true

Use exec():

let str = "Hello, world!"; let regex = /world/; let result = regex.exec(str); // Returns ["world", index: 7, input: "Hello, world!", groups: undefined]

4. Flags

Regular expressions can include flags to modify their behavior:

• i: Case-insensitive.
• g: Global search (find all occurrences).
• m: Multi-line mode (treat each line separately).
• s: DotAll mode (the dot . matches newlines).
• u: Unicode mode.
• y: Sticky mode (search from the lastIndex position).

Example with Flags:

let regex = /hello/i; // Case-insensitive let result = regex.test("Hello"); // Returns true

5. Search Patterns

Regular expressions allow you to define complex patterns:

• ^: Start of the string.
• $: End of the string.
• .: Any character except a newline.
• \d: A digit.
• \w: An alphanumeric character.
• \s: A whitespace character.
• *: Zero or more occurrences of the preceding pattern.
• +: One or more occurrences of the preceding pattern.
• ?: Zero or one occurrence of the preceding pattern.
• {n}: Exactly n occurrences of the preceding pattern.
• {n,m}: Between n and m occurrences of the preceding pattern.

Complex Pattern Example:

let regex = /^\d{3}-\d{2}-\d{4}$/; // Matches a US Social Security Number 
let result = regex.test("123-45-6789"); // Returns true 

Conclusion

Regular expressions in JavaScript are a powerful tool for manipulating strings. They allow you to define complex search patterns and apply them to text strings flexibly and efficiently. By mastering search patterns and associated methods, you can accomplish advanced text processing tasks.