2019-11-18 11:04:13 +09:00

24 lines
647 B
TypeScript

// swapElements assumes that both elements have valid parent nodes.
export default function swapElements(a: Node, b: Node) {
const bParent = b.parentNode as Node
const bNext = b.nextSibling
// Special case for when a is the next sibling of b
if(bNext === a) {
// Just put a before b
bParent.insertBefore(a, b)
} else {
// Insert b right before a
(a.parentNode as Node).insertBefore(b, a)
// Now insert a where b was
if(bNext) {
// If there was an element after b, then insert a right before that
bParent.insertBefore(a, bNext)
} else {
// Otherwise just append it as the last child
bParent.appendChild(a)
}
}
}