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Asked: 2024-09-27T08:04:11+05:30 In:

How can I retrieve a value from a JavaScript action within Power Automate Desktop?

I’ve been diving into Power Automate Desktop lately, and I keep hitting a wall when it comes to JavaScript actions. I thought I’d be able to leverage some of the custom functionality in JavaScript, but I seem to be missing a crucial piece of the puzzle. Maybe someone out there has figured this out?

So here’s the scenario: I’m trying to execute a JavaScript function within a flow, and I want to retrieve a value that comes from that function right afterward. It feels like it should be straightforward, but I can’t seem to wrap my head around the process. I’ve tried a few different approaches, but I’m not getting the results I want.

For example, let’s say my JavaScript action is processing some data and returning a value. I’d love to capture that returned value and then use it in subsequent actions of my flow. But, every time I try to refer to the result, it’s like I’m chasing my tail. I even watched a couple of tutorials and read through Microsoft’s documentation, but it still isn’t clicking for me.

I know Power Automate is pretty vast, and it has lots of moving parts, so maybe I’m just missing a small detail. Do I need to do something specific to store the returned value? Is there a particular way I should set up my variables? I’ve been experimenting with using global variables, but sometimes they feel unreliable or not well-suited for what I need.

If anyone has been through this or has any tips or tricks to share, I’d really appreciate any insights. Maybe you’ve encountered the same issue and found a solid workaround? I’m open to any suggestions, even if they seem a bit out there! The goal is to make my flow work seamlessly, and I’m sure I can get there with a bit of guidance from the community. Looking forward to hearing how you’ve tackled similar challenges!

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    2 Answers

    1. It sounds like you’re really diving deep into Power Automate Desktop and running up against some JavaScript hurdles. I totally get how frustrating it can be when things don’t click!

      From what you’re describing, it seems like the key part is how you handle the return value from your JavaScript function. When you set up your JavaScript action, there’s usually a way to specify what gets returned. Just like in regular programming, you need to ensure you’re returning the right value so that the flow can capture it.

      Here’s a broad outline of what to try:

      1. Check how you return values: Make sure your JavaScript function actually returns something. It might be as simple as using `return someValue;` at the end of your function.
      2. Store the result properly: After your JavaScript execution, there should be a variable option where you can store the returned value. Make sure you’re referencing that variable correctly in your subsequent actions.
      3. Use output variables: If possible, set an output variable in your JavaScript action. You can refer back to this variable in later steps.
      4. Debug: Put some log statements in your JavaScript code to see what’s happening. Sometimes printing the value to the console can help you understand if it’s being calculated correctly.
      5. Global vs. Local: While global variables can be useful, they can also lead to issues if modified elsewhere. It’s often better to use local variables specific to the action unless you absolutely need them to be global.

      If you’re still running circles around this, maybe give it another shot where you simplify the problem. A basic JavaScript function that returns a hard-coded value can help isolate if the issue is with JS logic or how it’s being hooked up in Power Automate.

      It’s all about trial and error sometimes, so keep tweaking things! Hopefully, this helps steer you in the right direction.

    2. In Power Automate Desktop, executing a JavaScript function and capturing its returned value can indeed be a bit tricky if you’re not familiar with the intricacies of variable handling. When you create a JavaScript action, the value returned by your script must be explicitly assigned to a variable in the flow. After your JavaScript code executes, framework variables can be used to capture the returned value, but you need to ensure that you are properly defining the variable type and scope. It’s recommended to use the “Set Variable” action within your flow right after your JavaScript action, assigning the result of your script to a local flow variable. This will make it accessible for later actions without any ambiguity.

      One common mistake is trying to reference the returned value without adequately setting it as a flow variable. If you use the “Run JavaScript” action, make sure that your JavaScript function explicitly returns the value using the `return` keyword. As a best practice, utilize descriptive variable names to track your flow’s data flow more intuitively. Additionally, double-check that you are not accidentally using a global variable unless required, as they can lead to unexpected behaviors. Debugging the flow step-by-step and logging output values can give you further insight into where things might be going off track. By focusing on the proper variable assignment and understanding the flow’s execution order, you can streamline your process and enhance the reliability of your automation.

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