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<!DOCTYPE html> <html> <body> <h2>JavaScript const</h2> <p>但是你不能重新赋值一个常量对象：</p> <p id="demo"></p> <script> try { const car = {type:"Porsche", model:"911", color:"white"}; car = {type:"BMW", model:"M5", color:"red"}; } catch (err) { document.getElementById("demo").innerHTML = err; } </script> </body> </html>