querySelectorAll()

a JavaScript function for selecting elements
  1. Welcome
  2. Examples
    - addEventListener()
    - Buttons
    - Data Attribute
    - document.
    querySelectorAll()

    - forEach()
    - Multiple Classes
    - to array
  3. Errors
    - Failed to execute 'querySelectorAll' on 'document'
  4. Advanced
  5. querySelectorAll() vs querySelector()
  6. Performance
  7. Troubleshooting

Links

  1. allowfullscreen
  2. Questions LLC

Troubleshooting

The querySelectorAll() function is a useful method for selecting elements in an HTML document using a CSS selector. However, there are some common issues and error messages that can arise when using this function. Here are some troubleshooting tips for dealing with these issues:

Uncaught TypeError: document.querySelectorAll is not a function

This error occurs when the querySelectorAll() function is not available on the document object. This can happen if the function has not been correctly imported or if it is not supported by the browser you are using. To fix this issue, make sure that you are using a modern browser that supports the querySelectorAll() function, and that you have imported the necessary JavaScript libraries or frameworks that provide this function.

Uncaught SyntaxError: Failed to execute 'querySelectorAll' on 'Document': '#foo' is not a valid selector

This error occurs when the querySelectorAll() function is passed an invalid CSS selector. The selector you pass to the function must be a valid CSS selector that can be used to select elements in an HTML document. If you are unsure of the syntax for a particular selector, you can refer to the CSS specification or consult online documentation for help.

Uncaught DOMException: Failed to execute 'querySelectorAll' on 'Document': The provided selector is empty

This error occurs when the querySelectorAll() function is called with an empty string as the argument. This can happen if you forget to pass a selector to the function, or if you accidentally pass an empty string instead of a valid selector. To fix this issue, make sure that you pass a valid CSS selector to the querySelectorAll() function, and that it is not empty.

Uncaught DOMException: Failed to execute 'querySelectorAll' on 'Document': The provided selector is not a string

This error occurs when the querySelectorAll() function is called with an argument that is not a string. The querySelectorAll() function expects a string containing a valid CSS selector as its argument. If you pass a non-string value, such as a number or an object, this error will be thrown. To fix this issue, make sure that you pass a string containing a valid CSS selector to the querySelectorAll() function.

Uncaught DOMException: Failed to execute 'querySelectorAll' on 'Document': Nodes cannot be inserted outside the document

This error occurs when the querySelectorAll() function is used to select elements that do not exist in the current HTML document. This can happen if the selector you pass to the function is incorrect, or if the elements you are trying to select have not been added to the document yet. To fix this issue, make sure that the selector you pass to the querySelectorAll() function is correct, and that the elements you are trying to select exist in the current HTML document.


By following these troubleshooting tips, you should be able to resolve most common issues and error messages that can arise when using the querySelectorAll() function. If you continue to have trouble, you can consult online documentation or seek help from other JavaScript developers for more specific advice.