【JavaScript】appendChild

append虛擬元素時

#newBlock
 width: 100px
 height: 100px
 background: teal
const newBlock=document.createElement('div');
newBlock.id='newBlock';
document.appendChild(newBlock.cloneNode(true));
cloneNode代表無限複製,如果沒有用這個引數,他只會做出「搬移」(僅複製一次的效果)

append現有元素時

#nowBlock
hr
#newland
#nowBlock
 width: 100px
 height: 100px
 background: teal
newLand.appendChild(nowBlock.cloneNode(true))