17.1 In case your control statement (if, while etc.) gets too long or exceeds the maximum line length, each (grouped) condition could be put into a new line. It’s up to you whether the logical operator should begin or end the line.
// bad
if ((foo === 123 || bar === 'abc') && doesItLookGoodWhenItBecomesThatLong() && isThisReallyHappening()) {
thing1();
}
// bad
if (foo === 123 &&
bar === 'abc') {
thing1();
}
// bad
if (foo === 123
&& bar === 'abc') {
thing1();
}
// good
if (
(foo === 123 || bar === "abc") &&
doesItLookGoodWhenItBecomesThatLong() &&
isThisReallyHappening()
) {
thing1();
}
// good
if (foo === 123 && bar === 'abc') {
thing1();
}
// good
if (
foo === 123 &&
bar === 'abc'
) {
thing1();
}
// good
if (
foo === 123
&& bar === 'abc'
) {
thing1();
}