ex5_8

Overview ¶

Modify `forEachNode` so that the `pre` and `post` functions return a boolean result indicating whether to continue the traversal. Use it to write a function `ElementByID` with the following signature that finds the first HTML element with the specific id attribute. The function should stop the traversal as soon as a match is found.

`func ElementByID(doc *html.Node, id string) *html.Node`