• Intro to AutoHotkey HotStrings with AutoHotkey Intermediate AutoHotkey GUIs are Easy with AutoHotkey Intro to DOS & AutoHotkey

08: Automating Chrome with AutoHotkey: How to handle EventListeners & custom edit fields

Automating Chrome with AutoHotkeyAutomating Chrome with AutoHotkey: handle EventListeners & custom edit fields


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Automating Chrome with AutoHotkey Script to Handle EventListeners & custom edit fields

Notes on handle EventListeners & custom edit fields

00:09     When web scraping, often there will be buttons I can’t press, text that doesn’t get “acknowledged” that it has been entered, etc.
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AutoHotkey Webinar- Advanced Web Scraping with AutoHotkey

Advanced Web Scraping with AutoHotkeyToday’s AutoHotkey Webinar on Advanced Web Scraping with AutoHotkey we covered some “fun” topics.   We also demonstrated using Visual Events 2 to detect Event Listeners on a page

Video Hour 1: High-level overview

Video Hour 2: Q&A

Be sure to grab our Web scraping syntax writer

Script highlight

; Stupid simple webScraping with AutoHotkey
Send, ^a ;Select All
sleep, 50
Send, ^c ;copy
sleep, 50
Clipboard:=StrSplit(Clipboard,”:”).1 ;split the clipboard on the colon and return everything to the left of the first one
Send, ^v ;paste
sleep, 350
Send, {tab 4} ;tab to the next field where I need to re-run

We also showed a bit about dealing with Try and using .item[0] in the DOM call. i.e. instead of using

pwb.document.getElementsByClassName(“feed”)[0].InnerText
use
pwb.document.getElementsByClassName(“feed”).item[0].InnerText
This way, if an element doesn’t exist, it will not error out.

To wait for it to be present you could do this

while (pwb.document.getElementsByClassName(“feed-identity-module__stat link-without-visited-state”).length < 3){
ToolTip, Here
Sleep, 50
Cap’n Odin offered up these two gems.  The first will close all running AutoHotkey scripts and the second one will pause them.

; Close all AutoHotkey scripts
DetectHiddenWindows On
Winget, lst, List, ahk_exe autohotkey.exe

loop % lst {
hwnd := lst%A_Index%
if(hwnd != A_ScriptHwnd) {
WinClose, % “ahk_id ” hwnd
}
return

; pause all AutoHotkey scripts
DetectHiddenWindows On
SetTitleMatchMode, 2
Winget, lst, List, AutoHotkey ahk_exe autohotkey.exe

loop % lst {
hwnd := lst%A_Index%
if(hwnd != A_ScriptHwnd) {
PostMessage, 0x111, 65306, , , % “ahk_id ” hwnd
}
}

Web Scraping with AutoHotkey 109a- Triggering an EventListener on a page

Triggering an EventListener
You ever plugging along on web scraping a page and have a problem with an element (drop down, edit field, radio button, etc) not updating?  Chances are the page has an EventListener watching that element for a specific Event type.  We used to be able to reliably “click” an element or send .fireEvent(“onchange”) / .fireEvent(“onclick”) however more and more pages are using this newer approach where they build an Event Listener and monitor for events on a given element.

If you’re not a programmer (like me), this was very problematic to deal with as the EventListener is located in a different place in the DOM.  In the below video I walk through how to spot the problem and offer up a couple of solutions (like Visual Event) that should greatly help. The second video below demonstrates using my updated AutoHotkey syntax writer.

Triggering an EventListener on a page

Black Bottle2

Updated AutoHotkey Syntax Writer

Here I demonstrate using my updated AutoHotkey Syntax writer to provide the needed information for the Events.

  • Intro to AutoHotkey HotStrings with AutoHotkey Intermediate AutoHotkey GUIs are Easy with AutoHotkey Intro to DOS & AutoHotkey