JS filter array if includes string in array

Question

I would like to filter out each in an array if the value of category is of a user selected value.

For example, I have an array of exampleData

[
    {
      "node": {
        "id": "377856cd-9477-58a4-9596-888ebc8c03d5",
        "title": "Tubing & Sledding",
        "category": [
          "Winter"
        ]
      }
    },
    {
      "node": {
        "id": "a7370249-af7a-538a-aaae-91f308575bb8",
        "title": "Snowmobiling",
        "category": [
          "Summer",
          "Winter"
        ]
      }
    },
    {
      "node": {
        "id": "4136389a-77b7-5e07-8c95-1c856983d27b",
        "title": "Snowshoeing",
        "category": [
          "Winter"
        ]
      }
    },
    {
      "node": {
        "id": "79fc5efa-e1a4-5e65-94cd-97a5245ed0af",
        "title": "X-Country Skiing",
        "category": [
          "Winter"
        ]
      }
    }
  ]

And I would like to filter the array to only return the objects with Summer included in the category field array .

To do this, I have tried

const exampleCategory = exampleData.filter(({ node: category }) => {
  activity.category.includes('Summer');
});

Yet, console.log(exampleCategory) shows with zero results.

What have I done wrong here?

Answer 1

You should return the boolean result of calling .includes:

const exampleCategory = exampleData.filter(({ node: { category }}) => {
   return category.includes('Summer');
});

Also, you can directly do that without return

const exampleCategory = exampleData.filter(({ node: { category }}) => category.includes('Summer'));

Example

const exampleData = [{    "node": {      "id": "377856cd-9477-58a4-9596-888ebc8c03d5",      "title": "Tubing & Sledding",      "category": [        "Winter"      ]    }  },  {    "node": {      "id": "a7370249-af7a-538a-aaae-91f308575bb8",      "title": "Snowmobiling",      "category": [        "Summer",        "Winter"      ]    }  },  {    "node": {      "id": "4136389a-77b7-5e07-8c95-1c856983d27b",      "title": "Snowshoeing",      "category": [        "Winter"      ]    }  },  {    "node": {      "id": "79fc5efa-e1a4-5e65-94cd-97a5245ed0af",      "title": "X-Country Skiing",      "category": [        "Winter"      ]    }  }];
const exampleCategory = exampleData.filter(({ node: { category }}) => category.includes('Summer'));

console.log(exampleCategory);

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