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Tryit: JAVASCRIPT
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<!DOCTYPE html> <html> <body> <p>单击按钮创建一个布尔对象，然后显示其构造函数</p> <button onclick="myFunction()">试一试</button> <p id="demo"></p> <script> function myFunction() { var bool = false; var x = bool.valueOf(); document.getElementById("demo").innerHTML = x; } </script> </body> </html>