Got some strange thing about methord Text()

[Longdexin]

Rod Version: v0.116.2

The code to demonstrate your question

Test code

package main

import (
   "log"
   "time"

   "github.com/go-rod/rod"
   "github.com/go-rod/rod/lib/launcher"
)

func main() {
   u := launcher.New().
   	Headless(false).
   	NoSandbox(true).
   	Set("disable-web-security").
   	Set("disable-site-isolation-trials").
   	MustLaunch()

   page := rod.New().ControlURL(u).MustConnect().NoDefaultDevice().MustPage("https://www.cincinnatichildrens.org/search/research")
   defer func() {
   	_ = page.Close()
   }()
   timeout := 10 * time.Second
   el, err := page.Timeout(timeout).ElementX(`//div[@class='intro']/h2[contains(text(),'Browse by Category')]`)
   if err != nil {
   	log.Println(err)
   	return
   }
   // print <h2>Browse by Category (28)</h2>
   if html, err := el.Timeout(timeout).HTML(); err == nil {
   	log.Println(html)
   }
   <-time.After(5 * time.Second) // when I comment this line, the text is blank
   if text, err := el.Timeout(timeout).Text(); err == nil {
   	log.Printf(`text: %s`, text)
   } else {
   	log.Println(err)
   }
} 

go.mod

module test

go 1.23.3

require github.com/go-rod/rod v0.116.2

require (
	github.com/ysmood/fetchup v0.2.4 // indirect
	github.com/ysmood/goob v0.4.0 // indirect
	github.com/ysmood/got v0.40.0 // indirect
	github.com/ysmood/gson v0.7.3 // indirect
	github.com/ysmood/leakless v0.9.0 // indirect
)

What you got

When I commented the line '<-time.After(5 * time.Second) ', the text printed below was blank, because the text had not shown up on the page yet, but the html printed above already had the text.

What you expect to see

Since I have selected the element by ElementX() successfully, the element should have the correct text as expected no matter it has shown on the page or not.

What have you tried to solve the question

I know it is reasonable, but it seems to be so wild at first sight and has caused some problems to my code.
Hope someone can explain this and help me out, thanks a lot.

[ysmood]

Element.Text will be affect by the render engine, it's upstream issue that rod can't solve, this code works fine to me:

package main

import (
	"fmt"

	"github.com/go-rod/rod"
)

func main() {
	page := rod.New().MustConnect().NoDefaultDevice().MustPage("https://www.cincinnatichildrens.org/search/research")
	el := page.MustElementX(`//div[@class='intro']/h2[contains(text(),'Browse by Category')]`)
	fmt.Println(el.MustWaitVisible().MustText())
}