What are some examples of scope chaining in JavaScript?

What are some examples of scope chaining in JavaScript?

Scope chaining in JavaScript refers to the way nested functions can access variables from their parent scopes. For example, if you have a variable in an outer function, an inner function can access it due to scope chaining.

Can you give me a specific code example?

Sure! Here's a simple example:

function outerFunction() {
    let outerVariable = 'I am from the outer scope';
    function innerFunction() {
        console.log(outerVariable); // Accessing outerVariable from the outer scope
    }
    innerFunction();
}
outerFunction();

What happens if I try to access a variable from a different outer scope?

If you try to access a variable from a different outer scope that is not in the chain, you'll get an error. JavaScript only allows access to variables in the current scope and its parent scopes.

Are there any limitations to scope chaining?

Yes, one limitation is that if a variable is not defined in any of the parent scopes, it will result in a ReferenceError. Also, deep nesting can make code harder to read.