# Check if all array elements are equal to a given value

Compare every item with a value using ===.

Canonical: https://1loc.dev/validator/check-if-all-array-elements-are-equal-to-a-given-value/
Version: 1.0.0
Runtime: JavaScript · Node.js 22 / modern browsers
Verification: Local fixtures; no external services
Updated: 2026-10-28

## Implementation

```javascript
function isEqual({ values, value }) { return values.every(item => item === value); }
```

## Input

```json
{
  "values": [
    "delivered",
    "delivered"
  ],
  "value": "delivered"
}
```

## Expected output

```json
true
```

## Edge case

Input:
```json
{
  "values": [],
  "value": "delivered"
}
```
Output:
```json
true
```

## Limits

- An empty array returns true: no item differs.
- Strict equality: "1" and 1 are different.

The lab validates types and size before calling this function. Add equivalent validation at your own trust boundary.

## Source and license

Original: https://github.com/phuocng/1loc/blob/14b481cf60dff1620ab1bb99a43b1f68068cdd9b/contents/check-if-all-array-elements-are-equal-to-a-given-value.mdx
Author: Nguyen Huu Phuoc and original contributors
Contributors: contributorpw, tugsanunlu
Source commit: 14b481cf60dff1620ab1bb99a43b1f68068cdd9b
Copyright (c) 2020 phuoc-ng
License: MIT — https://1loc.dev/licenses/
Maintainer: Oveyon
Modifications: Keeps the every variant; takes values and value as one object. Original MDX retained as inert source evidence.