関連ワード:  what does document queryselector return    what does document queryselectorall return    what does document dot queryselector return    what does document queryselectorall .item return    what does document queryselectorall (' div ') return    what does document queryselector (' class name ') return    what does the document queryselector () method return    what is document.queryselector    what does document.queryselector do  
結果 : what does document queryselector return