You can use # to get the value when user clicks the button using document.querySelector(“”); Following is the JavaScript code −
Example
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css"> <script src="https://code.jquery.com/jquery-1.12.4.js"></script> <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script> </head> <body> <div class="container container-fluid"> <p><strong> Example:</strong> choose a number between 1 to 100</p> <form> <div class="form-group"> <label for="number">Give a number:</label> <input id="inputNumber" value="" type="text" name="number" /> </form> <p id="output"></p> </div> <button class="btn btn-dark" id="choose" type="submit">Click Me</button> </body> <script> function example() { let btn = document.querySelector("#choose"); let randomNumber = Math.ceil(Math.random() * 100); btn.onclick = function() { let givenNumber = document.querySelector("#inputNumber").value; let valueInt = parseInt(givenNumber, 100); console.log(randomNumber, givenNumber); }; } example(); </script> </html>
To run the above program, save the file name anyName.html(index.html) and right click on the file and select the option open with live server in VS code editor.
Output
Add a value −
On clicking the button Click Me, the same is visible in Console −