Update the count of searched results and change the selection based on the number of time user searched in array of objects

I would like to add a function in which users can go to the next searched result. Thanks, @ggorlen for helping with the recursive search.

I have a recursive search function that gives the first value and makes them selected = true and if it is in nested array make showTree=true.

• How I can add a function in which if the user clicks the next search record then the selected: true will set to the next result and remove the previous one?

• and based on the new results showTree will change.

• How to add a variable which gets updated based on the number of time search is called...

• previous record option so user can go back to the previous result

const expandPath = (nodes, targetLabel) => {
  for (const node of nodes) {
    if (node.label.includes(targetLabel)) {
      return (node.selected = true);
    } else if (expandPath(node.item, targetLabel)) {
      return (node.showTree = true);
    }
  }
};

// Output

expandPath(testData, 'ch');

//// add variable for count  example: 1 of 25

console.log(testData);

//if user click on nextrecord after search


//nextrecord(){
//logic to remove the selected true from current and add for next
//update showtree
//update recordNumber of totalValue example: 2 of 25
//}


//child3 should get selected true and remove child1 selected true and showtree
//same add showTree= true based on selected value

//if user click on previous record after search

//previousrecord(){
//logic to remove the selected true from current and add for previous
//update showtree
//update recordNumber of totalValue example: 1 of 25
//}



console.log(testData);

.as-console-wrapper { max-height: 100% !important; top: 0; }

<script>
// Test Data
const testData = [
  {
    id: 1,
    label: 'parent1',
    item: [
      {
        id: 21,
        label: 'child1',
        item: [
          {
            id: 211,
            label: 'child31',
            item: [
              {
                id: 2111,
                label: 'child2211',
                item: [{ id: 21111, label: 'child22111' }]
              }
            ]
          },
          { id: 222, label: 'child32' }
        ]
      },
      {
        id: 22,
        label: 'child2',
        item: [
          {
            id: 221,
            label: 'child421',
            item: [{ id: 2211, label: 'child2211' }]
          },
          { id: 222, label: 'child222' }
        ]
      }
    ]
  },
  {
    id: 2,
    label: 'parent2',
    item: [
      {
        id: 21,
        label: 'child2',
        item: [
          {
            id: 511,
            label: 'child51',
            item: [
              {
                id: 5111,
                label: 'child5211',
                item: [{ id: 51111, label: 'child52111' }]
              }
            ]
          },
          { id: 522, label: 'child352' }
        ]
      }
    ]
  }
];
</script>

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