JavaScript：POST 参数的动态名称

Question

I end up with an undefined value when trying to output an HTTP POST parameter whose name I am trying to assemble dynamically (MEAN environment, server-side). Example:

var dynamicName = "surname";
console.log('value of POST parameter surname: '+req.body.dynamicName); //should refer to req.body.surname but remains undefined

Not even 'eval()' helps.

console.log(eval(req.body.dynamicName)); //still undefined

What am I missing?

Answer 1

This should work: console.log('value of POST parameter surname: '+req.body[dynamicName]); . By doing a dot notation, you are referring to dynamicName property, not the value it holds as a variable.