To solve the "Cannot read property 'remove' of undefined" error, make sure to provide a valid identifier when getting the DOM elements. The error often occurs when passing an invalid class name to the `getElementsByClassName` method.

Solve - Cannot read property 'remove' of Undefined in JS

## Solve - Cannot read property 'remove' of Undefined

**The "Cannot read property 'remove' of undefined" error occurs for 2 reasons:**

1. Calling the `remove()` method on a DOM element that doesn't exist.
2. Placing the JS script tag above the HTML where the DOM elements are declared.

```javascript:index.js
const el = undefined;

// ⛔️ Cannot read properties of undefined (reading 'remove')
el.remove();
```

<InArticleAd />

**To solve the "Cannot read property 'remove' of undefined" error, make sure to
provide a valid identifier when getting the DOM elements. The error often occurs
when passing an invalid class name to the `getElementsByClassName` method.**

```javascript:index.js
const boxes = document.getElementsByClassName('does-not-exist');
console.log(boxes); // 👉️ []

// ⛔️ Cannot read properties of undefined (reading 'remove')
boxes[0].remove();
```

Because the class name is not found in the DOM, the `getElementsByClassName()`
method returns an empty array-like object.

Trying to access an array at an index that doesn't exist returns `undefined`,
causing the error.

**To solve the "Cannot read property 'remove' of undefined" error, make sure the
JS script tag is placed at the bottom of the body tag. The script should run
after the DOM elements have been created.**

```html:index.html
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
  </head>
  <body>
    
    <script src="index.js"></script>

    <div class="box">Box 1</div>
    <div class="box">Box 2</div>
  </body>
</html>
```

Notice that the `index.js` script is executed before the div elements are
created. This means that the div elements will not be accessible in the
`index.js` file.

```javascript:index.js
const boxes = document.getElementsByClassName('box');
console.log(boxes); // 👉️ []

// ⛔️ Cannot read properties of undefined (reading 'remove')
boxes[0].remove();
```

<InArticleAd />

Instead, you should place the JS script tag at the bottom of the body, after the
`div` elements are declared.

```html:index.html
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
  </head>
  <body>
    <div class="box">Box 1</div>
    <div class="box">Box 2</div>

    
    <script src="index.js"></script>
  </body>
</html>
```

Now the `index.js` file has access to the `div` elements.

```javascript:index.js
const boxes = document.getElementsByClassName('box');
console.log(boxes); // 👉️ [div.box, div.box]

// ✅ Works
boxes[0].remove();
```

## Conclusion

The "Cannot read property 'remove' of undefined" error occurs when the
`remove()` method is called on an `undefined` value.

To solve the error, make sure to only call the `remove` method on valid DOM
elements.

<InArticleAd />

Solve - Cannot read property 'remove' of Undefined in JS

Solve - Cannot read property 'remove' of Undefined #

Conclusion #

Borislav Hadzhiev

For more articles, navigate to myHome Page

Solve - Cannot read property 'remove' of Undefined in JS