====== Execute JavaScript in Custom HTML Prompt ======

The //Execute JavaScript in Custom HTML Prompt// action let you execute JavaScript in a [[action:Custom_HTML_Prompt|Custom HTML Prompt]] window.

{{ execute-javascript-in-custom-html-prompt-action.png?nolink&674x161 | Execute JavaScript in Custom HTML Prompt Action }}

This action allows you to execute a specified JavaScript, either from a file or text entered in the Action itself, and return the results.

===== Specify the Custom HTML Prompt =====

You can specify a [[action:Custom_HTML_Prompt]] with a matching [[action:Custom_HTML_Prompt#HTML_Window_Design|data-kmwindowid]] to apply the JavaScript to, otherwise it will be applied to all open Custom HTML Prompt windows.

===== Options for Returning Results =====

  * ignore results.
  * display results in a window.
  * display results briefly.
  * display results large.
  * type results.
  * paste results.
  * save results to variable.
  * append results to variable.
  * save results to the system clipboard or a named clipboard.
  * save results to a file.
  * asynchronously  — the script runs while the macro continues on, no results are returned.

If the results are to be saved to a variable or a clipboard then further text areas appear in the action allowing you to specify the variable or specific clipboard.

===== Using Keyboard Maestro Variables =====

You can use the window.KeyboardMaestro facilities of the [[action:Custom_HTML_Prompt|Custom HTML Prompt]] to read and write Keyboard Maestro variables.

===== See Also =====

* [[Browser_Actions|Browser Actions]]
* [[Browser_Window_Actions|Browser Window Actions]]
* [[Browser_Form_Actions|Browser Form Actions]]
* [[Wait_For_Browser_to_Finish_Loading| Wait For Browser to Finish Loading actions]]

=== Actions ===

* [[action:Execute_a_JavaScript_in_Front_Browser|Execute a JavaScript in Front Browser]]
* [[:Actions|See all Actions]]

==== Forum ====

- [[https://forum.keyboardmaestro.com/t/execute-javascript-in-custom-prompt-question/4491|Execute JavaScript in Custom Prompt Question]]