The querySelectorAll() method is a method of the Document object in the web browser that allows you to find elements in the document that match a specified CSS selector. It returns a static (not live) NodeList of elements that match the specified group of CSS selectors.
Here's an example of how you might use querySelectorAll():
const elements = document.querySelectorAll('.my-class');
This would find all elements in the document with the class my-class.
If you are seeing an error that says "failed to execute 'querySelectorAll' on 'Document'", it means that the querySelectorAll() method is not being recognized by the browser. This could be because:
To fix the error, you will need to make sure that you are using querySelectorAll() in a context where it is supported, check for typos, and make sure that your code is not being executed before the DOM is ready.