typescript 如何检查值是否为 NaN?
声明:本页面是StackOverFlow热门问题的中英对照翻译,遵循CC BY-SA 4.0协议,如果您需要使用它,必须同样遵循CC BY-SA许可,注明原文地址和作者信息,同时你必须将它归于原作者(不是我):StackOverFlow
原文地址: http://stackoverflow.com/questions/42654595/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
提示:将鼠标放在中文语句上可以显示对应的英文。显示中英文
时间:2020-09-09 07:36:56 来源:igfitidea点击:
How to check if value is NaN?
提问by ajaysinghdav10d
In TypeScript, how can we check if some value is NaN
?
在 TypeScript 中,我们如何检查某个值是否为NaN
?
The following does not work:
以下不起作用:
someObject.someValue == NaN
someObject.someValue === NaN
回答by zeh
Same as JavaScript, isNaN
.
与 JavaScript 相同,isNaN
.
if (isNaN(someObject.someValue)) ...
Or the more modern Number.isNaN
或者更现代的 Number.isNaN
if (Number.isNaN(someObject.someValue)) ...