如何在 Javascript 中比较字符串和布尔值?
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]
推荐答案
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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