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我在javascript中创建了一个日期,所以:

    var thisDate = new Date(); 
    thisDate.setHours(0); 
    thisDate.setMinutes(0); 
    thisDate.setSeconds(0); 
    thisDate.setMilliseconds(0);

当我将鼠标悬停在变量上时,根据 Chrome 调试器工具提示:

  Fri Mar 15 2013 00:00:00 GMT-0400 (Easte...
  > __proto__: Invalid Date
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