Protractor - How to locate element by custom (non HTML) attributes?

Question

I am using Selenium WebDriver and Protractor to run e2e tests on my angular project. Let\'s say I have an element like:

Answer 1

Try to use xpath:

element(by.xpath('//div[@my-unique-id="abc123"]'))

or only by attribute

element(by.xpath('//div[@my-unique-id]'))