If or return statment syntax of javascript

Question

What is the meaning of :

return i ? null : "red";

? What is the meaning of "?" and ":"

Answer 1

That's a ternary operation.

Its syntax is:

condition ? operation-if-true : operation-if-false

For instance

return myVariable >5 ? 'a' : 'b';

return "a" if myVariable is greater than 5, otherwise "b".