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自己太菜了

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#1 Created at ... [Delete] [Delete and Lock User] 
var list = document.querySelector('#test-div1')
  const childs = Array.from(list.children).filter(x => x.innerText === "JavaScript" || x.innerText === "HTML" || x.innerText === "CSS")
  for (let e of Array.from(list.children))
    list.removeChild(e);
  for (let e of childs)
    list.appendChild(e)
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