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Tryit: JAVASCRIPT
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<!DOCTYPE html> <html> <body> <h2>使用“严格模式”：</h2> <h3>在函数内部，如果未指定，“this”关键字不再是全局对象：</h3> <script> "use strict"; function myFunction() { alert(this); } myFunction(); </script> </body> </html>