the separation of front and rear ends is not mentioned in the go web programming book, and beginners are confused in learning. I use fmt.Fprint to write json data to the page. How to call the interface at the front end, I return the json data instead of writing it directly on the page
func handler(w http.ResponseWriter, r *http.Request){
var body json.RawMessage
// todo
b, _ := body.MarshalJSON()
w.Header().Set("Content-Length", strconv.Itoa(len(b)))
w.Write(b)
}do your processing in todo
api, in http mode can be seen in the browser, and the front-end page can get the value in ajax mode.
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