Webdriver.io: isExisting().then() is not a function

Question

I would like to check if there is a logout element. If it is existing, I want to do the logout by clicking this element:

browser.isExisting('.logout').then(function() {
    browser.click('.logout');
});

But this gives me an Uncaught TypeError: browser.isExisting(...).then is not a function-error.

Answer 1

If your using a version <4, you want this. http://webdriver.io/v3.4/api/utility/waitForExist.html

browser.waitForExist('.logout').then(function() {
    browser.click('.logout');
});

But if you use V4+, everything is synchronous ( http://webdriver.io/guide/getstarted/v4.html ), and you would need to rewrite a bit. http://webdriver.io/api/utility/waitForExist.html

Something like this

var logout = browser.element('.logout');
logout.waitForExist(5000);
browser.click('.logout');