Document.querySelectorAll()

The Document method querySelectorAll() returns a static (not live) NodeList representing a list of the document’s elements that match the specified group of selectors.

Inputs: selectors A string containing one or more selectors to match. This string must be a valid CSS selector string; if it isn’t, a SyntaxError exception is thrown.

Inputs: Note that the HTML specification does not require attribute values to be valid CSS identifiers. If a class or id attribute value is not a valid CSS identifier, then you must escape it before using it in a selector, either by calling CSS.escape() on the value, or using one of the techniques described in Escaping characters. See Escaping attribute values for an example.