Access part of array of object based on condition

data is an array. Arrays have different methods (functions) you can run. These allow you to find items or update the array. In this case filter, find or findIndex seem like a good fit. To learn more about Arrays see: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array

filter()

filter() will return an array of items that match your condition, in this case:

data.filter(item => item.status === "COMPLETED")

find()

Alternative, find will return the first item that matches your condition:

data.find(item => item.status === "COMPLETED")

findIndex()

findIndex is similar to find, but it returns the index instead of the actual item:

data.findIndex(item => item.status === "COMPLETED")

You can do something like this to filter data with completed status. It will filter all data with status equals to completed and then map their name to completedNames.

const completedNames=data.filter(people => people['status']==='COMPLETED').map(person => person['name'])

Also if you are using functional component you can use useState to assign this to a state:

import {useState} from 'React'

const [compNames, setCompNames] = useState([]);

.
.
const completedNames=data.filter(people => people['status']==='COMPLETED').map(person => person['name'])

setCompNames(completedNames);

Method filter will be a good option when filtering a data stack, for cases like this. But here are a few options you can go with;

var data = []

data = json.data.filter(d => d.status == 'COMPLETED')
console.log(data)

data = []
json.data.reduce(d => d.status == 'COMPLETED' && data.push(d))
console.log(data)

data = []
json.data.forEach(d => d.status == 'COMPLETED' && data.push(d))
console.log(data)

As a few other answers have pointed out, filter() provides an effective way of only retrieving those items from the data returned by your API that match the completed status, and then return the names from those items using map().

Here it is in action. Click "Run code snippet" below to see the result(s):

const data = [{ status: "COMPLETED", _id: "606bf5d19173931121c0017c", userId: { _id: "606bf5d19173931121c0017a", email: "[email protected]", contactNumber: 7896541236 }, name: "Admin1" }, { status: "PENDING", _id: "606c074e9173931121c0017f", userId: { _id: "606c074e9173931121c0017d", email: "[email protected]", contactNumber: 9638527416 }, name: "Admin3" }, { status: "PENDING", _id: "606c07a99173931121c00182", userId: { _id: "606c07a99173931121c00180", email: "[email protected]", contactNumber: 9638527477 }, name: "Admin4" }, ];

// if you want a filtered list of ALL details
let filteredData = data.filter(e => e.status === "COMPLETED");
console.log('filteredData =', filteredData);

// if you want a filtered list of ONLY names
let filteredNames = data.filter(e => e.status === "COMPLETED").map(e => e.name);
console.log('filteredNames =', filteredNames);

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