Generate random password string with requirements in javascript

by

Forcing a fixed number of characters is a bad idea. It doesn’t improve the quality of the password. Worse, it reduces the number of possible passwords, so that hacking by bruteforcing becomes easier.

To generate a random word consisting of alphanumeric characters, use:

var randomstring = Math.random().toString(36).slice(-8);

How does it work?

Math.random()                        // Generate random number, eg: 0.123456
             .toString(36)           // Convert  to base-36 : "0.4fzyo82mvyr"
                          .slice(-8);// Cut off last 8 characters : "yo82mvyr"

Documentation for the Number.prototype.toString and string.prototype.slice methods.

More Related Contents:

  1. What exactly does Math.floor do?
  2. how to use if(math.random == 50)? [closed]
  3. How do I generate a randomly selected word, or phrase, from a previously selected list of words and phrases in Javascript? [closed]
  4. Generate random string/characters in JavaScript
  5. Get a random item from a JavaScript array [duplicate]
  6. Generate unique random numbers between 1 and 100
  7. Seeding the random number generator in Javascript
  8. Is it correct to use JavaScript Array.sort() method for shuffling?
  9. Seedable JavaScript random number generator
  10. How to randomize (shuffle) a JavaScript array?
  11. Generating random whole numbers in JavaScript in a specific range
  12. Random alpha-numeric string in JavaScript?
  13. math random number without repeating a previous number
  14. Generate unique number within range (0 – X), keeping a history to prevent duplicates
  15. Create an array with random values
  16. How random is JavaScript’s Math.random?
  17. Generate random integers with probabilities
  18. Generating unique random numbers (integers) between 0 and ‘x’
  19. How to choose a weighted random array element in Javascript?
  20. True or better Random numbers with Javascript [duplicate]
  21. Random floating point double in Inclusive Range
  22. Write a truly inclusive random method for javascript
  23. Random number generator without dupes in Javascript?
  24. JavaScript Math.random Normal distribution (Gaussian bell curve)?
  25. Elegant method to generate array of random dates within two dates
  26. Collisions when generating UUIDs in JavaScript
  27. Javascript: Generate a random number within a range using crypto.getRandomValues
  28. Creating array of length n with random numbers in JavaScript
  29. Random Point on a given Sphere
  30. JavaScript – How to randomly sample items without replacement?

Leave a Comment