To be able to interact with a page, you need to tell Protractor exactly which element to look for. The basis used for selecting elements are locators. Protractor, as well as including the generic Selenium selectors, also has Angular-specific locators which are more robust and persistent to changes. However, sometimes, even in an Angular application, regular locators must be used.
|selector||A string which specifies the value of the selector (depends on the locator)|