JavaScript：使用函数参数检索javascript对象键

Is there a reason this is 'undefined, and is there a way to avoid it?

有没有理由这是'未定义的,有没有办法避免它?

I am trying to dynamically retrieve the desired error message from my error messages object. This is a very simplified version of it.

我试图从我的错误消息对象动态检索所需的错误消息。这是它的一个非常简化的版本。

var language = {
    errorMsg: {
        helloWorld: "hello world"
    }
};

function displayErrorMsg(msg) {
    console.log(msg); // output: helloWorld
    console.log(language.errorMsg.helloWorld); // output: hello world
    console.log(language.errorMsg[msg]); // output: Uncaught ReferenceError: helloWorld is not defined 
}

displayErrorMsg('helloWorld');

3 个解决方案

#1

Well in your example language.errorMsgTSD does not exist

那么在您的示例language.errorMsgTSD不存在

You could do:

你可以这样做:

function displayErrorMsg(msg) {
    console.log(language.errorMsg[msg]); // output: hello world
}

3 个解决方案

#1

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