Vue.js Mounted Hook Error: 'TypeError: Cannot read properties of undefined (reading 'addEventListener')'

This error usually happens when your mounted hook tries to interact with an object that hasn't been defined yet.

To fix this, carefully review your mounted hook and look for any variables or objects that might be undefined. Make sure you've initialized them correctly before using them. You can also use console.log() statements to print the values of variables and objects to ensure they're defined as expected.

If you're using third-party libraries or plugins, the problem could be related to incorrect installation or configuration. In these cases, consult the library's documentation or reach out to the developers for assistance.