从不是所选e同级的DOM中选择元素

const elements = document.querySelectorAll(':not(e)');

function getElementsNotSiblingOf(element) {
  const parent = element.parentNode;
  const siblings = parent.children;
  const elements = [];

  for (let i = 0; i < siblings.length; i++) {
    if (siblings[i] !== element) {
      elements.push(siblings[i]);
    }
  }

  return elements;
}

const e = document.getElementById('e');
const elements = getElementsNotSiblingOf(e);