Unable to access frame: Error - Unable to retrieve 'add' property from undefined

I am working on customizing the chatbot functionality for my website built with Nuxt.js. I want the chatbot to display on certain pages while remaining hidden on others. Unfortunately, I encountered an issue when trying to hide it on specific pages.

To implement the chatbot, I included script tags in app.html. For the pages where I do not want the chatbot to appear, I tried using the following code within mounted:

  var element = document.getElementsByClassName("fc_frame")
  element.classList.add("d-none");

However, this resulted in a 500 error and the console displayed:

TypeError: Cannot read properties of undefined (reading 'add')

Do you have any suggestions for resolving this error?

javascriptcssvue.jsdomnuxt.js

Answer №1

Another approach is to utilize querySelector instead of getElementsByClassName when there's only one element with the fc_frame class, like so: var element = document.querySelector(".fc_frame");

The querySelector method retrieves the first element with the fc_frame class (or null if none exist). Subsequently, we can add the d-none class to the element's classList if the element is present.

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