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Run JavaScript Function on web page

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Posted on by rhawkins10701

Wanting flow to change value of drop down box on web page. Drop down value will be 'Strength' and Field 3 is referencing which drop down box.

Run action but value is not changing need assistance with syntax. Any help is appreciated!

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Power Automate Desktop

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VJR 7,635 on at

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Hi @rhawkins10701

Could you also please try with the other options like

document.getElementById('Field3').value = 'Strength';
document.getElementById('Field3').selectedIndex = 2; //Starts from 0, if Strength is at the 3rd position

Also right click on that element and Inspect the code for the dropdown.
Also, some dropdown values are only triggered if the text is written via SendKeys

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rhawkins10701 30 on at

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Thanks I attempted both syntax and still not triggering the dropdown value. I am not familiar with SendKeys that you were referring to. How would I write text via SendKeys?

Thanks for your assistance!

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VJR 7,635 on at

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Hi @rhawkins10701

Sendkeys should be the last resort when nothing else works.

You are using Power Automate Desktop, so curious to know why are you looking to inject javascript to change the dropdown value?
You can spy that element and perform any of the UI Automation options that PAD gives.
Set drop-down list value on web page:
https://docs.microsoft.com/en-us/power-automate/desktop-flows/actions-reference/webautomation#setdropdownlistvaluebase

This is how the dropdown on the webpage looks like

This is the html of the above webpage

Changing the car value using "Set drop-down list value on web page":

After running the process the dropdown value is changed

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rhawkins10701 30 on at

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Thanks for the assistance with the new action! I am still having issues and I am thinking it is because the web page is crystal reporting. Would this have an effect on the action? I added new UI element and selected the drop down value.

Also, prior to selecting the drop down value I have to click "click to select custom fields" in order to display the drop down values. I've attempted to use action Click Link on Web Page to display drop down values but wasn't working.

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VJR 7,635 on at

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Hi @rhawkins10701

Yes it is true that some webpages are not "spyable" due to the nature they are built.

- Are you able to see the html of the select dropdown just like the way I showed you

- play with the selectors and see which one behaves better than the other.
Keep ticking one or more combination of options

- I will anyways share with you the Sendkeys option too but do keep it as your last alternative

Click on that element
Use appropriate Wait time
After Sending the Down arrow it selected the second element in below screenshot
Here you can also send the Down arrow multiple times depending on where your 'Strength' value is in the list
Alternatively, you can also type the initial alphabet or the starting few characters like S (as in Strength). Take care about another word starting with the same character S).

- For reference Saab is the 2nd option in the list.

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maxpower45255 223 on at

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I'm piggy-backing on this if it's ok.
I have a web page that returns an unknown number of invoice lines in an html table. I'd like to loop through them and read the values of certain fields if a checkbox next to each line (row) is checked. I'm experimenting with the "run javascript function in a webpage" action but it's not returning anything. I'm trying to find all the checkboxes with a certain CSS class, then hopefully loop through each. The action appears to take a few seconds and almost looks like it's hanging. Then it completes without errors. But my result still shows blank.

function ExecuteScript() {var collection = document.getElementsByClassName("invoiced-class"); return collection.length;}

thanks!

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momlo 1,527 Super User 2024 Season 1 on at

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Hi @maxpower45255

1. I always test in browser console if your JS works before using in PAD - this gives me clear information there is a issue is with JS code or on PAD side.

2. I find that with some pages, I need ti "click" any element on the page before executing the JS -making the window in focus does not do the trick, you need to click the actual element for page to accept the JS.

So first test if browser console returns anything for you when you use your code, and only then (if it does) come back to PAD.

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maxpower45255 223 on at

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@momlo Thanks for the tips. I figured out the primary issue is the browser type. The javascript action seems to only work with Microsoft Edge. I am also unable to explain the intermittent success I'm having with this javascript action. Yesterday, I was able to get it working by starting the developer console. Then my javascript action seemed to work just fine, even after I closed it. Today, without making any changes to my flow, the same logic won't work.
One thing I noticed is I was getting a message in Edge when the javascript action triggers that says "Edge is being debugged" or something of that sort. Today, I'm not getting that at all.
Any help with this behavior would be appreciated. This is very annoying, and I've been wasting my time doing trial and error to figure out this issue, but to no avail.

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rajanrajamany1 4 on at

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@maxpower45255 Whether you found any solution? I'm facing similar issue, Run JavaScript Function on web page is not working.

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maxpower45255 223 on at

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@rajanrajamany1 I have not. Unfortunately I haven't had to work on this again. My priorities shifted. But I'd love to know if someone figures this out. Hopefully MSFT is monitoring these threads and might comment. Good luck and please update this thread if you ever find a solution.

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