JavaScript - Generate Random User Password

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In this tutorial we will create a Generate Random User Password using JavaScript. The code itself can generate a random user password automatically. This will be easier for the administrator to create new account without inputting one by one manually. You can apply this script to your code to make your transaction faster, it is a user-friendly program feel free to modify it.

We will use javascripts to add some new feature to the website interface by actually written into an HTML page. It is what gives your page a different interactive elements and animation that engage a user.

Getting Started:

This is the link for the bootstrap that i used for the layout design

The Main Interface

This code contains the interface of the application. To create this just write these block of code inside the text editor and save this as index.html.

  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4. <meta charset="UTF-8" name="viewport" content="width=device-width, initial-scale=1"/>
  5. <link rel="stylesheet" type="text/css" href="css/bootstrap.css"/>
  6. </head>
  7. <nav class="navbar navbar-default">
  8. <div class="container-fluid">
  9. <a class="navbar navbar-brand" href="<a href="">Sourcecodester</a>
  10. " rel="nofollow">">Sourcecodester</a>
  11. </a> </div>
  12. </nav>
  13. <div class="col-md-3"></div>
  14. <div class="col-md-6 well">
  15. <h3 class="text-primary">JavaScript - Generate Random User Password</h3>
  16. <hr style="border-top:1px dotted #ccc;"/>
  17. <div class="col-md-2"></div>
  18. <div class="col-md-8">
  19. <form>
  20. <div class="form-group">
  21. <label>Name</label>
  22. <input type="text" id="name" class="form-control"/>
  23. </div>
  24. <div class="form-inline">
  25. <label>Password</label>
  26. <br />
  27. <input type="number" placeholder="Length" class="form-control" id="p_length"/>
  28. </div>
  29. <br />
  30. <div id="result">
  31. </div>
  32. <center><button class="btn btn-default" type="button" onclick="generatePassword();">Generate</button></center>
  33. </form>
  34. </div>
  35. </div>
  36. <script src="js/script.js"></script>
  37. </body>
  38. </html>

Creating the Script

This code contains the script of the application. This code will generate a random user password automatically. To do this just copy and write these block of codes as shown below inside the text editor and save it as script.js inside the js directory

  1. function generatePassword(){
  2. var p_length = document.getElementById("p_length");
  3. var name = document.getElementById("name");
  5. if(name.value == "" || p_length.value == ""){
  6. alert("Please complete the required field!")
  7. }else{
  8. var num = parseInt(p_length.value);
  9. if(num > 0 && num <= 12){
  10. var html = "<h4>Name:<label class='text-info'>"+name.value+"</label><h4>" + "<h4>Password: <label class='text-info'>"+randomPassword(p_length.value)+"</label></h4>";
  11. document.getElementById("result").innerHTML = html;
  12. document.getElementById("p_length").value = "";
  13. document.getElementById("name").value = "";
  14. }else{
  15. alert("Password length must have minumum of 1 and maximum of 12");
  16. }
  17. }
  18. }
  20. function randomPassword(length){
  21. var characters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
  22. var newPassword = "";
  24. for(var i = 0, j = characters.length; i < length; i++){
  25. newPassword += characters.charAt(Math.floor(Math.random() * j));
  26. }
  28. return newPassword;
  29. }

There you have it we successfully created a Generate Random User Password using JavaScript. I hope that this simple tutorial help you to what you are looking for. For more updates and tutorials just kindly visit this site. Enjoy Coding!

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