我从服务器获得了 Json "false"
.我以 bool
响应,但它是 Json,所以它在浏览器中的类型是 String
而不是 bool
.
I got the Json "false"
from server. I respond as bool
but it's Json so it's in browser type is String
instead of bool
.
因此,如果我在想要检查 "false" == false
时运行 (!data)
则它们不起作用.
So if I run (!data)
whenever I want to check "false" == false
then they not worked.
那么如何在 JavaScript 中从 String
解析 bool
呢?
So how can I parse bool
from String
in JavaScript then?
"true" == true
和 "false" == false
.然后代码 (!data)
可以检查它是什么 [true
和 false
]
"true" == true
and "false" == false
. Then the code (!data)
can check what it is [true
and false
]
我会明确检查字符串 "true"
.
I would just explicitly check for the string "true"
.
let data = value === "true";
否则你可以使用 JSON.parse()
将其转换为原生 JavaScript 值,但如果您知道它只是字符串 "true"
或 "false,则会产生很多开销"
你会收到的.
Otherwise you could use JSON.parse()
to convert it to a native JavaScript value, but it's a lot of overhead if you know it's only the strings "true"
or "false"
you will receive.
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