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<!DOCTYPE html> <html> <head> <title>Utility Methods Best Practices Example</title> <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <script> $(document).ready(function(){ // Validate input function validateInput(input) { return typeof input === 'string' && input.trim() !== ''; } let input = " Valid Input "; if (validateInput(input)) { console.log("Input is valid"); } else { console.log("Input is invalid"); } // Handle exceptions try { let parsed = $.parseJSON('{"name": "John", "age": 30}'); console.log("Parsed JSON: ", parsed); } catch (e) { console.log("Failed to parse JSON: ", e.message); } // Optimize performance let largeArray = new Array(1000000).fill(0).map((_, i) => i); let evenNumbers = $.grep(largeArray, function(value){ return value % 2 === 0; }); console.log("Number of even numbers: " + evenNumbers.length); }); </script> </head> <body> </body> </html>
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