create a password with uppercase letters in javascript

To create a password string with uppercase letters in JavaScript, you can use the Math.random() and String.fromCharCode() methods to generate random characters and convert them into uppercase letters.

Here is an example function that generates a random password with a specified length and at least one uppercase letter:

index.tsx
function generatePassword(length) {
  let password = "";
  const uppercaseCharCodeStart = 65; // ASCII code for 'A'
  
  while (password.length < length) {
    // Generate a random character code within the range of uppercase letters
    const charCode = Math.floor(Math.random() * 26) + uppercaseCharCodeStart;
    // Convert the char code to its corresponding letter and add it to the password
    password += String.fromCharCode(charCode);
  }
  
  return password;
}

// Generate a password with 8 characters
const password = generatePassword(8);
console.log(password); // Output: "SKWIFHZJ"
596 chars
18 lines

In this function, we first define a variable password as an empty string. Then, we define uppercaseCharCodeStart as the ASCII code for the uppercase letter 'A' (which is 65). We use this value to generate random character codes within the range of uppercase letters.

Inside the while loop, we generate a random character code using Math.random() and Math.floor() to get an integer between 0 and 25 (inclusive). We add this integer to uppercaseCharCodeStart to get a char code within the range of uppercase letters.

Finally, we convert the char code to its corresponding letter using String.fromCharCode() and add it to the password string until it reaches the specified length. The function returns the generated password string.