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2020-04-13 12-15-05
Marco Sacay
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1Comments
Cannot read properties of null (reading 'addEventListener')
Question
JavaScript
Component
Debug
Dependencies
Plugin

Hi,

I am using a forge component:

Restrict Chars Reactive - Overview | OutSystems  

and receiving this error after leaving the page

Here's the code level details of the component:

I didn't get this error on Dev environment only on Test. which is weird to me.

Any JavaScript developer can help me fix this?


Thank you.

Marco

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09 Mar 2022
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2022-11-02 16-38-27
Guillermo Diez Matilla

Hi, the problem is that document.getElementById($parameters.WidgetId) is returning null. So later is trying to do addEventListener of an null element and that's the error. 

You should add a console.log of WidgetId and test on the console of the browser to verify what is its value and why is returning null document.getElementById of your widget

Kind regards

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09 Mar 2022
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