How can I prevent variable shadowing in my code?

How can I prevent variable shadowing in my code?

Variable shadowing occurs when a variable in a local scope has the same name as a variable in an outer scope. To prevent it, you can use unique variable names, follow naming conventions, or use block scoping with let and const in JavaScript.

Can you give me an example of variable shadowing?

Sure! Here's a simple example in JavaScript:

function example() {
    let x = 10;
    if (true) {
        let x = 20; // This x shadows the outer x
        console.log(x); // Outputs: 20
    }
    console.log(x); // Outputs: 10
}

What are some best practices to avoid this issue?

Some best practices include:

1. Use descriptive variable names.
2. Limit the scope of variables as much as possible.
3. Use const and let instead of var to avoid hoisting issues.

Are there tools that can help detect variable shadowing?

Yes, many linters like ESLint can help detect variable shadowing issues in your code. You can configure rules to warn you about shadowed variables.