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<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>JavaScript Cannot Delete a Function in Strict Mode</title> </head> <body> <script> "use strict"; function sum(a, b) { return a + b; } delete sum; // SyntaxError </script> <p><strong>Note:</strong> Please check out the browser console by pressing the f12 key on the keyboard.</p> </body> </html>
