Does ES6 support the Elvis operator? [duplicate]

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");

Answer 2

The short answer to your answer is "No". There is no Elvis operator in javascript. But you can achieve the same behavior in a few different short ways like so:

Using plain ternary operator:

var x = y ? 10 : null;

Or using a simple 'if' for just a single output:

if (debug) console.log("Value of x:", x);