# Easily removing a specific item from an Array in JavaScript

Let's say we have an array of numbers:

```javascript
let values = [3, 6, 12];
console.log(values); // Output: [3, 6, 12]
```

If we wanted to remove the number '6' from this array we could use the following JavaScript code to achieve this:

```javascript
const target = 6; 
const index = values.indexOf(target);

// if not -1 we found a match
if (index !== -1) { 
  // splice(start, deleteCount)
  values.splice(index, 1); 
}

console.log(values); // Output: [3, 12]
```

We get the index to find the target position using`indexOf()`. This method returns the first occurrence of the designated element's index, or `-1` if the element doesn't exist.

We then check if the element exists within the array. If it does, we implement `splice()` to erase it. The `splice()` method modifies the array by removing or replacing existing elements.

### To replace instead you can use:

```javascript
const target = 6; 
const index = values.indexOf(target);

if (index !== -1) { 
  // splice(start, deleteCount, item0)
  values.splice(index, 1, 7); 
}

console.log(values); // Output: [3, 7, 12]
```