x/net/html: add Node methods Ancestors, ChildNodes, Descendants #62113
Description
This is assuming #61405 is accepted.
Iterating through all the children of an html.Node is tedious. The current code has this example of a recursive function printing out links:
var f func(*html.Node)
f = func(n *html.Node) {
if n.Type == html.ElementNode && n.Data == "a" {
for _, a := range n.Attr {
if a.Key == "href" {
fmt.Println(a.Val)
break
}
}
}
for c := n.FirstChild; c != nil; c = c.NextSibling {
f(c)
}
}
f(doc)It would be much nicer with an iterator:
for n := range doc.All() {
if n.Type == html.ElementNode && n.Data == "a" {
for _, a := range n.Attr {
if a.Key == "href" {
fmt.Println(a.Val)
break
}
}
}
}