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<!DOCTYPE html> <html> <head> <title>Using .trim() in Form Validation Example</title> <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <script> $(document).ready(function(){ $("#submit").click(function(){ var input = $("#input").val(); var trimmedInput = $.trim(input); if(trimmedInput.length === 0) { alert("Input cannot be empty"); } else { alert("Valid input: " + trimmedInput); } }); }); </script> </head> <body> <input type="text" id="input" value=" "> <button id="submit">Submit</button> </body> </html>
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