Should I use an empty property key?

Question

I\'ve tested this only in Firefox, but apparently you can use an empty string as a key to a property in an object. For example, see the first property here:

Answer 1

Technically, there is nothing wrong and you can savely use it on any js engine (that I'm aware of). Since ECMAscripts spec says any object key is a string, it of course can also be an empty string.

The only caveat is, that you'll never be able to access that property with the dot notation

countsByStatus.;

will lead to a syntax error of course, so it always needs to be

countsByStatus[''];

That much about the technical part. If we talk about the convinient part, I'd vote for a very clear no, never use it.

It'll lead to confusion and as we all know, confusion is the enemy.