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Welcome to WordPress. This is your first post. Edit or delete it, then start writing! Hi GeeksforGeeks Enter Your Name: Submit var user_name = document.getElementById(«name»); document.getElementById(«btn-alert»).addEventListener(«click», function(){ var value=user_name.value.trim(); if(!value) alert(«Name Cannot be empty!»); else alert(«Hello, » + value + «!\nGreetings From GeeksforGeeks.»); });