JavaScript - Dynamically Add Option To Select Tag

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In this tutorial we will create a Dynamically Add Option To Select Tag using JavaScript. JavaScript is a scripting or programming language that allows you to implement complex things on web pages. It is widely used in designing a stunning website. It is an interpreted programming language that has a capabilities of Object-Oriented. This code can be used as your calculator to any mathematical problem. So Let's do the coding...

Getting started:

This is the link for the bootstrap that i used for the layout design https://getbootstrap.com/.

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-brand" href="https://sourcecodester.com">Sourcecodester</a>
  10. </div>
  11. </nav>
  12. <div class="col-md-3"></div>
  13. <div class="col-md-6 well">
  14. <h3 class="text-primary">JavaScript - Dynamically Add Option To Select Tag</h3>
  15. <hr style="border-top:1px dotted #ccc;"/>
  16. <div class="col-md-2"></div>
  17. <div class="col-md-8">
  18. <div class="form-inline">
  19. <label>Enter a country</label>
  20. <input type="text" id="option" class="form-control"/>
  21. </div>
  22. <br />
  23. <center><button type="button" class="btn btn-primary" onclick="addOption()"><span class="glyphicon glyphicon-plus"></span> Add option</button></center>
  24. <br />
  25. <div class="form-group">
  26. <select id="select" class="form-control">
  27. <option value="">--Select an option--</option>
  28. </select>
  29. </div>
  30. </div>
  31. </div>
  32. <script src="js/script.js"></script>
  33. </body>
  34. </html>

Creating the Script

This code contains the script of the application. This code can dynamically add an option to select tag without doing a hard code 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 folder.

  1. function addOption(){
  2. var select = document.getElementById('select');
  3. var option = document.getElementById('option');
  4.  
  5. if(option.value == ""){
  6. alert("Please enter somethin first!");
  7. }else{
  8. var newOption = document.createElement("option");
  9. var newOptionValue = document.createTextNode(option.value);
  10.  
  11. newOption.appendChild(newOptionValue);
  12. select.insertBefore(newOption, select.lastChildNode);
  13.  
  14. option.value = "";
  15. select.value = "";
  16. }
  17. }

There you have it we successfully created a Simple Password Validation 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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