标签:efi false define def doc als null lse nan
document.write("--------------");
document.write(!false);
document.write("---------------");
document.write(!0);
document.write("---------------");
document.write(!false);
document.write("---------------");
document.write(!undefined);
document.write("---------------");
document.write(!NaN);
document.write("---------------");
document.write(!null);
document.write("---------------");
标签:efi false define def doc als null lse nan
原文地址:https://www.cnblogs.com/500m/p/12233981.html