@wordpress/block-library/build-module/navigation/edit/utils.js

Block library for the WordPress editor.

function getComputedStyle(node) {
  return node.ownerDocument.defaultView.getComputedStyle(node);
}

export function detectColors(colorsDetectionElement, setColor, setBackground) {
  if (!colorsDetectionElement) {
    return;
  }

  setColor(getComputedStyle(colorsDetectionElement).color);
  let backgroundColorNode = colorsDetectionElement;
  let backgroundColor = getComputedStyle(backgroundColorNode).backgroundColor;

  while (backgroundColor === 'rgba(0, 0, 0, 0)' && backgroundColorNode.parentNode && backgroundColorNode.parentNode.nodeType === backgroundColorNode.parentNode.ELEMENT_NODE) {
    backgroundColorNode = backgroundColorNode.parentNode;
    backgroundColor = getComputedStyle(backgroundColorNode).backgroundColor;
  }

  setBackground(backgroundColor);
}
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