How can I pass objects to a matrix in a GitHub Action?

I have a JavaScript GitHub action which outputs a simple array of objects, like so:

[
  {
    prop1: val1a,
    prop2: val2a,
    prop3: val3a
  },
  {
    prop1: val1b,
    prop2: val2b,
    prop3: val3b
  }
]

In a new job, I'd like to read in this array, loop over it, and print the property values during each iteration of the loop. How is that done, especially the last part?

With the code below, I've managed to create a new job, and have it loop over each element in the array. But during each iteration, how can I access the property values of each element?

Thanks in advance.

---

My Code

myAction.yml

name: GitHub Actions Demo
on: [push]
jobs:
  job1:
    outputs:
      matrix: $
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2.3.4
        with:
          fetch-depth: 0
      - name: Test JS action # Run the JavaScript action to output an array of objects.
        id: hello
        uses: ghusername/myreponame@master

  # Run the second job here, to read in the output of the previous job, set its value to a matrix, then iterate over that matrix.
  job2:
    needs: [job1]
    runs-on: ubuntu-latest
    strategy:
      matrix: $
    steps:
      - run: echo "I want to outputted objects from job1 to print here"

myJavaScriptAction.js (located on GitHub at ghusername/myreponame@master

const core = require("@actions/core");
 
const myArr = [
  {
    prop1: 111,
    prop2: 222,
    prop3: 333
  },
  {
    prop1: 444,
    prop2: 555,
    prop3: 666
  }
]

/* Convert output array to valid JSON, then stringify it. This is required in order to pass it to the next GitHub action.*/
outputArr = {
  include: myArr,
};
core.setOutput(
  "matrix",
  JSON.stringify(outputArr)
);

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