How to filter array when object key value is in array

You can do it with Array.prototype.filter(),

var data = { records : [{ "empid": 1, "fname": "X", "lname": "Y" }, { "empid": 2, "fname": "A", "lname": "Y" }, { "empid": 3, "fname": "B", "lname": "Y" }, { "empid": 4, "fname": "C", "lname": "Y" }, { "empid": 5, "fname": "C", "lname": "Y" }] }var empIds = [1,4,5]var filteredArray = data.records.filter(function(itm){  return empIds.indexOf(itm.empid) > -1;});filteredArray = { records : filteredArray };

If​ the ​callBack​ returns a ​true​ value, then the ​itm​ passed to that particular callBack will be filtered out. You can read more about it here.​​​​​​

In 2019 using ES6:

const ids = [1, 4, 5],  data = {    records: [{      "empid": 1,      "fname": "X",      "lname": "Y"    }, {      "empid": 2,      "fname": "A",      "lname": "Y"    }, {      "empid": 3,      "fname": "B",      "lname": "Y"    }, {      "empid": 4,      "fname": "C",      "lname": "Y"    }, {      "empid": 5,      "fname": "C",      "lname": "Y"    }]  };data.records = data.records.filter( i => ids.includes( i.empid ) );console.info( data );