ElementList<Element> querySelectorAll(
String selectors
)

Finds all descendant elements of this document that match the specified group of selectors.

Unless your webpage contains multiple documents, the top-level querySelectorAll method behaves the same as this method, so you should use it instead to save typing a few characters.

selectors should be a string using CSS selector syntax.

var items = document.querySelectorAll('.itemClassName');

For details about CSS selector syntax, see the CSS selector specification.

Source

/**
 * Finds all descendant elements of this document that match the specified
 * group of selectors.
 *
 * Unless your webpage contains multiple documents, the top-level
 * [querySelectorAll]
 * method behaves the same as this method, so you should use it instead to
 * save typing a few characters.
 *
 * [selectors] should be a string using CSS selector syntax.
 *
 *     var items = document.querySelectorAll('.itemClassName');
 *
 * For details about CSS selector syntax, see the
 * [CSS selector specification](http://www.w3.org/TR/css3-selectors/).
 */
ElementList<Element> querySelectorAll(String selectors) => document.querySelectorAll(selectors);