Several things can make JavaScript challenging for developers to work with, including:
<ol>
<li>Asynchronous programming: JavaScript is single-threaded, but it has mechanisms for handling asynchronous code, such as callback functions and Promises, which can make the code more complex and harder to understand.
</li>
<li>Variable scope: JavaScript has function-level scope, which can lead to unexpected behavior if variables are not managed properly.
</li>
<li>Type coercion: JavaScript is a loosely typed language, which means that it can automatically convert between types. This can lead to unexpected results if the developer is not aware of how types are being handled.
</li>
<li>Cross-browser compatibility: JavaScript can behave differently across different browsers, which can make it difficult to ensure that code works consistently across different platforms.
</li>
<li>Frameworks and Libraries: The abundance of JavaScript Frameworks and Libraries can make it hard for developers to choose the right one for their project and also to keep up with updates.
</li>
<li>Security: JavaScript is a client-side language, which means that it runs on the user's device. This can make it vulnerable to attacks if proper security measures are not taken.
</li>
</ol>

Several things can make JavaScript challenging for developers to work with, including:

1. Asynchronous programming: JavaScript is single-threaded, but it has mechanisms for handling asynchronous code, such as callback functions and Promises, which can make the code more complex and harder to understand.
    
2. Variable scope: JavaScript has function-level scope, which can lead to unexpected behavior if variables are not managed properly.
    
3. Type coercion: JavaScript is a loosely typed language, which means that it can automatically convert between types. This can lead to unexpected results if the developer is not aware of how types are being handled.
    
4. Cross-browser compatibility: JavaScript can behave differently across different browsers, which can make it difficult to ensure that code works consistently across different platforms.
    
5. Frameworks and Libraries: The abundance of JavaScript Frameworks and Libraries can make it hard for developers to choose the right one for their project and also to keep up with updates.
    
6. Security: JavaScript is a client-side language, which means that it runs on the user's device. This can make it vulnerable to attacks if proper security measures are not taken.

What is difficult about JavaScript?