Javascript : Check if any of the element in array is null or empty (Return True-False)

Question

I have below array in javascript -

[
{
 id:1,
 deptName:"Cashier"
},
{
 id:2,
 deptName:"MF"
},
{
 id:3,
 deptName:""
},
{
 id:4,
 deptName:"RD"
},
{
 id:5,
 deptName:null
},
]

I want to check if any element for deptName in above array is null or empty.

I used -

var isNullOrEmpty= data.every(ele=>(ele.deptName===null || ele.deptName===""))

use of every function is returning false in every case. i.e. whether I keep deptName in any of the element to be null / empty or I fill it with value. With both the cases it is returning me false.

I want to check if any of the deptName in array is null or empty.

As the name suggests. .every() returns true when every element in the array fulfills the test. You want .some() -> How much research effort is expected of Stack Overflow users? — Andreas
– Andreas, Commented Feb 16, 2022 at 10:06
This has nothing to do with jQuery or React. So why the tags? — Andreas
– Andreas, Commented Feb 16, 2022 at 10:06

zahra zamani · Accepted Answer · 2022-08-31 05:44:00Z

4

every() method in JavaScript is used to checks whether all the elements of the array satisfy the given condition or not. The Array. some() method in JavaScript is used to check whether at least one of the elements of the array satisfies the given condition or not.
For your issue:

var isNullOrEmpty= data.some(ele=>(ele.deptName===null || ele.deptName===""))

edited Aug 31, 2022 at 5:44

answered Feb 16, 2022 at 10:08

zahra zamani

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Paiman Rasoli · Accepted Answer · 2022-02-16 10:32:48Z

1

You can also use array.map function with an if to check if the value not exist or empty:

arr.map((item, index) => {
 if (!item?.deptName) {
     console.log(`array index =>[${index}] is null or empty.`);
    }
 });

answered Feb 16, 2022 at 10:32

Paiman Rasoli

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