设置子节点相对于父节点水平竖直都居中

//父节点设置flex布局display: flex;align-items: center;justify-content: center;

dom.style.display = 'flex'dom.style.alignItems = 'center'dom.style.justifyContent = 'center'let img = document.createElement('img')img.src = trashimg.style.width = '50%'// img.style.height = 15dom.appendChild(img)

// removeChild(dom)