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<!DOCTYPE html> <html> <body> <p>将 5 赋值给 x，并显示比较的值（x === 5）：</p> <button onclick="myFunction()">试一试</button> <p id="demo"></p> <script> function myFunction() { var x = 5; document.getElementById("demo").innerHTML = (x === 5); } </script> </body> </html>