Can you use AND and OR in an if statement?

Question

The logic I am trying to express is:

• if condition_1 AND
• either condition2 OR condition3 AND
• condition_4 THEN
• console.log("THING ONE")
• OTHERWISE
• console.log("THING TWO");

edit - figured out original issue was in other code whilst writing, so posting answer Q&A-style

Answer 1

Yes, it looks like you can, if the or condition is in parenthesis, eg:

var logged_in = true;
var author_username = "fred";
var username = "fred";
var is_editor = false;
var is_something = true;


if (logged_in === true && (author_username === username || is_editor === true) && is_something === true) {
  console.log("THING ONE");
} else {
  console.log("THING TWO");
}

See also:

How to specify multiple conditions in an if statement in javascript

Which Logic Operator Takes Precedence