Does ES6 support the Elvis operator?

Question

Does Javascript / ES6 support the Elvis operator?

Example:

var x = (y==true) ?: 10;

Example 2:

var debug = true;
debug ?: console.log("Value of x:" + x);

Answer 1

No, but you can just use || or &&, seems to perform same function.

var debug = true;
debug && console.log("debug mode on ");
debug || console.log("debug mode off");