Javascript - 获取变量的名称

Question

When i call a function in javascript with a variable, for example:

CheckFunction(MyVariable);
CheckFucntion(MyVariable2);

And i have a function which, for example, checks if it's a number or not:

function CheckFunction(SOURCE){
//THE CODE ITSELF
};

I wanna log with the name of the original variable, how could i get that? I can get the name "SOURCE" with the code below:

Object.keys({SOURCE})[0])

But i'd like to log with the original name( MyVariable ) from the called function.

Sample output in the console:

Area is a number.

Where Area is a integer variable, and its name got checked from CheckFunction() function.

Answer 1

This is not possible in Javascript without any third-party tools to analyze the code. Variables will not hold where they have been / come from.

The best you can do is what you already have with Object.keys({SOURCE})[0]) This is because you are converting the variable to a key and then reading the key again.

You would need a method on the variable to get the name as a string.

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A better solution would be to send another parameter to the function with its location. ie . CheckFunction(myVariable, 'onLoad); . Alternatively, you could send an object with more verbose information that will help you track what you need.