If you just want to check whether there's any value, you can do
(如果您只想检查是否有任何价值,可以)
if (strValue) {
//do something
}
If you need to check specifically for an empty string over null, I would think checking against ""
is your best bet, using the ===
operator (so that you know that it is, in fact, a string you're comparing against).
(如果您需要专门检查是否有一个空字符串,而不是null,那么我认为使用===
运算符来检查""
是最好的选择(这样您就可以知道它实际上是您要与之进行比较的字符串) )。)
if (strValue === "") {
//...
}
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