How to Fix TypeError: scrollIntoView is not a function in React

If you are working with React and encounter the error “TypeError: scrollIntoView is not a function,” don’t worry, you’re not alone. This error typically occurs when you try to use the scrollIntoView method on an element, but it is not implemented in the current environment.

What is scrollIntoView?

The scrollIntoView method is a built-in JavaScript function that allows you to scroll an element into the visible area of the browser window. It is commonly used to automatically scroll to a specific section or element on a web page.

Why does the error occur?

The error “TypeError: scrollIntoView is not a function” occurs because the scrollIntoView method is not implemented in the testing environment you are using. This is a common issue when using libraries like jsdom for testing React components.

How to fix the error?

To fix the “TypeError: scrollIntoView is not a function” error, you can manually add the scrollIntoView method to the HTMLElement prototype. Here’s how you can do it:

window.HTMLElement.prototype.scrollIntoView = function() {};

By adding this line of code, you are extending the HTMLElement prototype and providing an empty implementation for the scrollIntoView method. This allows your code to run without throwing the error.

Where to place the code in React?

The placement of the code depends on your testing environment setup. If you are using Jest for testing your React components, you can utilize setup files to add the code. Here’s how you can do it:

  1. Create a setup file, e.g., setupTests.js, in your project’s src directory.
  2. Add the following code to the setupTests.js file:
window.HTMLElement.prototype.scrollIntoView = function() {};
  1. Configure Jest to use the setup file by adding the following line to your jest.config.js or package.json:
{
  "jest": {
    "setupFilesAfterEnv": ["<rootDir>/src/setupTests.js"]
  }
}

By following these steps, the scrollIntoView method will be added to the HTMLElement prototype before running your tests, ensuring that the error is resolved.

Example usage in React component

Now, let’s see an example of how you can use the scrollIntoView method in a React component:

import React, { useRef } from 'react';

const ScrollToElement = () => {
  const elementRef = useRef(null);

  const handleClick = () => {
    elementRef.current.scrollIntoView({ behavior: 'smooth' });
  };

  return (
    <div>
      <button onClick={handleClick}>Scroll to Element</button>
      <div ref={elementRef}>Target Element</div>
    </div>
  );
};

export default ScrollToElement;

In this example, we have a button that, when clicked, triggers the scrollIntoView method on the target element, scrolling it into view smoothly. The useRef hook is used to create a reference to the target element, which is then passed to the ref attribute of the element.

Conclusion

The “TypeError: scrollIntoView is not a function” error can be frustrating when working with React, especially in testing environments. However, by manually adding the scrollIntoView method to the HTMLElement prototype, you can overcome this error and use the method as intended. Remember to place the code in the appropriate setup file for your testing environment, such as Jest’s setup files.

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