浏览器对Javascript中的简写空/未定义检查有什么支持？

Question

A few years ago I remember using something like this in some Javascript:

someFunc(someVar || 42);

...as a shorthand in case someVar is null or undefined. I vaguely remember IE 8 choking on this. Maybe I'm remembering incorrectly, so can anyone confirm or deny browser support issues with this type of Javascript statement?

I don't have access to IE 8 at the moment so I can't test it myself. Also, if this question isn't a duplicate, then it might be useful to others. Lastly, is there a name for this type of conditional statement?

Answer 1

这种事情在IE 10中运行。如果IE 8是硬性要求，您可以做的是三元运算符：

funcCall(someVal ? someVal : 42)