Can Applescript Access Browser Tabs And Execute Javascript In Them?
Solution 1:
For Google Chrome, use execute
from AppleScript Chromium Suite:
execute v : Execute a piece of javascript.
executespecifier : The tab to execute the command in.
javascripttext : The javascript code to execute.
Example:
tell application "Google Chrome"
execute front window's active tab javascript "alert('example');"
end tell
Can be done in Safari either:
tell application "Safari" to doJavaScript"alert('example')"indocument1
For other browsers, check the functions at File -> Open Dictionary
on AppleScript editor.
Solution 2:
The function below runs JavaScript in each tab of the frontmost window in Chrome and concatenates the output. To run JavaScript in in all windows, replace window 1
with windows
.
xjss(){ osascript -e'on run {a}
set o to ""
tell app "Google Chrome" to repeat with t in (get tabs of window 1)
tell t to set o to o & (execute JavaScript a) & linefeed
end
end' -- "$1"; }
This runs JavaScript in only the frontmost tab:
xjs(){ osascript -e'on run {a}
tell app "Google Chrome" to tell active tab of window 1 to execute JavaScript a
end' -- "$1"; }
Here are similar functions for Safari:
sjss(){ osascript -e'on run {a}
set o to ""
tell app "Safari" to repeat with t in (get tabs of window 1)
tell t to set o to o & (do JavaScript a) & linefeed
end
end' -- "$1"; }
sjs(){ osascript -e'on run {a}
tell app "Safari" to tell document 1 to do JavaScript a
end' -- "$1"; }
Since some version of Chrome released in 2018, an error like this is shown by default when running an execute JavaScript
command:
78:98: execution error: Google Chrome got an error: Executing JavaScript through AppleScript is turned off. To turn it on, from the menu bar, go to View > Developer > Allow JavaScript from Apple Events. For more information: https://support.google.com/chrome/?p=applescript (12)
Safari has a similar preference in "Develop > Allow JavaScript from Apple Events" which was turned off by default in macOS version 10.11.5 (released in 2016-05-16).
Solution 3:
Recently Google Chrome disabled the ability to execute JavaScript via AppleScript. I'm having trouble finding a reference link, but in Chrome Canary v59 it doesn't work and gives a message saying it's disabled, and I'm seeing it still work in Chrome v57 so it's got to be very new.
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