@ou-imdt/utils/lib/hasTextSelection.js

Utility library for interactive media development

/**
 * Determines if a node currently has a text selection.
 * @param {Node} node - The node to check for text selection.
 * @returns {boolean} `true` if the node contains a text selection, otherwise `false`.
 */
export default function hasTextSelection(node) {
  const selection = document.getSelection();
  const containsSelection = node.contains(selection.focusNode); // last selected node
  const hasSelection = (containsSelection && !selection.isCollapsed); // collapsed = no length
  return hasSelection;
}