playwright._impl._api_types.Error: Evaluation failed: cyclic object value when retriving dataLayer variable - Playwright-Python

Question

I'm using playwright with Python.

I'm trying retrieve the datalayer from a page with page.evaluate() from playwright .

The error i get :

playwright._impl._api_types.Error: Evaluation failed: cyclic object

My code :

datalayer = page.evaluate('''() => {
      
                   return JSON.stringify(window.dataLayer)
        
                }''')
print(datalayer)

In my return statement i've tried :

return window.dataLayer // return dataLayer => none object is returned in my print()
List return dataLayer[0] => got the first element .

Is there a way to do this ?

EDIT :

what i need to get ( the full array + child objects ideally ) :

Thanks

ANSWER :

page.evaluate("() => dataLayer")

The problem is not in playwight. The browser is not able to serialize that object. So you should try to solve as much as possible inside the evaluate and then return only the data you need. — hardkoded, Jun 02 '21 at 20:48

score 0 · Accepted Answer · edited Jul 10 '21 at 21:18

0

After reading the entire doc :

page.evaluate("() => dataLayer")

edited Jul 10 '21 at 21:18

Wai Ha Lee

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answered Jul 10 '21 at 10:57

Hugo

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playwright._impl._api_types.Error: Evaluation failed: cyclic object value when retriving dataLayer variable - Playwright-Python

1 Answers1