javascript - Webdriver.io: isExisting().then() is not a function - Stack Overflow

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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.

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.

• javascript
• webdriver
• webdriver-io

Share Improve this question Follow asked Jul 21, 2016 at 8:29 user3142695user3142695 17.4k5555 gold badges200200 silver badges375375 bronze badges 1

• Is the purpose of your code is that you want to ensure that .logout exists before clicking on it? – garajo Commented Aug 5, 2016 at 8:23

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3 Answers 3

Sorted by: Reset to default 2

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');

Rewrite it to use object

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

https://webdriver.io/docs/api/element/isExisting.html You using 4.0 syntax for 5.0 webdriver.io

Check https://github./webdriverio/webdriverio/blob/master/CHANGELOG.md#v500-2018-12-20 for more

You can look here: http://webdriver.io/api/state/isExisting.html

client.isExisting(selector);

Returns boolean. So your code should look something like this:

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

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