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<script type="text/javascript">
class VNode {
constructor(name, attrs, value, type) {
this.name = name
this.attrs = attrs
this.value = value
this.type = type
this.children = []
}
addChildren(node) {
this.children.push(node)
}
}
function create(node) {
let _vnode = null
if (node.nodeType === 1) {
const attributes = [...node.attributes]
const attrs = attributes.reduce((prev, curr) => {
prev[curr.name] = curr.value
return prev
}, {});
_vnode = new VNode(node.nodeName.toLowerCase(), attrs, null, node.nodeType)
for (let item of node.childNodes) {
_vnode.addChildren(create(item))
}
} else if (node.nodeType === 3) {
_vnode = new VNode(node.nodeName.toLowerCase(), null, node.nodeValue, node.nodeType)
}
return _vnode
}
let vnode = create(document.querySelector("#root"))
console.log(vnode);
function parse(node) {
let nodeEl = null
if (node.type === 1) {
nodeEl = document.createElement(node.name)
for (let key in node.attrs) nodeEl.setAttribute(key, node.attrs[key])
node.children.forEach(item => {
nodeEl.appendChild(parse(item))
});
} else {
nodeEl = document.createTextNode(node.value)
}
return nodeEl
}
let dom = parse(vnode)
console.log(dom);
</script>
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