What is "no-string-literal" rule in tslint?

Question

The description found here is very short:

Disallows object access via string literals.

Is there any further documentation or example?

Diagnostic

Answer 1

It means you can't access objects using the bracket notation. For example:

object["property"]

This way, a simple typo will throw an error and that's why it should be avoided. Instead, it is encouraged to use strongly-typed access.

Moorwort

Why do I need such of rule? – Diagnostic

agreed, I dislike this rule becose sometimes you have to use object literals – Mckeon

The reason for this rule is because there is no need to use a string literal to access a property, other than cases like obj["prop-erty"] (which are allowed by this rule). – Molecule

I do like this rule because it prevents accessing a private or protected property / method when we are not supposed to. I do have to disable this rule on occasion (mostly on unit tests) inside the file itself. – Conveyancer