Accessing object in javascript

Question

Please explain, why this code it's not allowed in javascript and how to make it.

var p = "inputText";
regError.p

This will give me undefined but

regError.inputText 

will give me a correct result.

Answer 1

You can do it by using bracket notation:

regError[p]

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Property_Accessors

Answer 2

If you have an object like this

var regError = {
    inputText : 'something'
}

and you want to access it with a variable, you'll have to use bracket notation

var p = "inputText";

var result = regError[p]; // returns "something"

Answer 3

Use with bracket notation:

regError[p]

You can check the difference between them here and there