What does |= do in Javascript?

Question

While trying to fix a bug in another person's code, I found this line:

affiliationData.affiliationStatuses |= AffiliationStatuses.affiliatedWithCurrentCrmUser;

What does it actually do?

It has to be noted that the question this is being marked a duplicate of actually refers to [tag:java] and [tag:android], not [tag:javascript]. Since I searched SO with "[javascript] |=" I didn't find it. — connexo, Jul 30 '15 at 07:36
MDN mainly specifies APIs (eventhough there are MDN resources about this topic). What you're looking for is the ECMAScript (Javascript) language specification. You may want to search for phrases like "ecmascript OR javascript operators", then you'll _definitely_ find it. — try-catch-finally, Jul 30 '15 at 08:36

score 4 · Answer 1 · answered Jul 30 '15 at 07:31

4

The | is a Bitwise OR operator.

That statement is equivalent to:

affiliationData.affiliationStatuses = affiliationData.affiliationStatuses | AffiliationStatuses.affiliatedWithCurrentCrmUser

answered Jul 30 '15 at 07:31

Pepe

score 3 · Accepted Answer · answered Jul 30 '15 at 07:32

3

Bitwise OR assignment

Shorthand operator:

x |= y

Meaning:

x = x | y

Source

answered Jul 30 '15 at 07:32

Beri

score 2 · Answer 3 · answered Jul 30 '15 at 07:31

`x |= y`

is shorthand of x= x|y where | is a bitwise OR

Therefore

affiliationData.affiliationStatuses |= AffiliationStatuses.affiliatedWithCurrentCrmUser;

is equivalent to:

affiliationData.affiliationStatuses = affiliationData.affiliationStatuses | AffiliationStatuses.affiliatedWithCurrentCrmUser;

3 Answers3