Change assignee to custom field value based on components

[J]

Is there a way to update the assignee from a custom field value based on components during a workflow transition?  For example: 

Component = xyz

Owner (Custom Field) = Jane Smith 

Assignee = John Doe 

I'd like to update the Assignee field to Jane Smith (which the value of the Owner) when the issue transition from IN PROGRESS to Development. 

There is a post function called Assign from custom field but that's a straight assignment, no need to specify condition. 

[Krishnanand Nayak]

here is the scriptrunner code:

if ('xyz' in issue.components*.name and issue.reporterId = 'userId'){

     issue.assigneeId = 'newUserId';

}

[Alexey Matveev]

Hello,

You can not accomplish it without an app. You would need an app like Power Scripts, Scriptrunner, Automation for Jira.

If you want to use the Power Scripts app then you can write a post function like this;

if ("xyz" in components and reporter = "jane.smith") {

   assignee = "john.doe";

}

[J]

We use scriptrunner, how do I accomplish this in scriptrunner post function?