How do I access properties in a JavaScript object?

How do I access properties in a JavaScript object?

You can access properties in a JavaScript object using dot notation or bracket notation. For example, if you have an object let obj = {name: 'Alice', age: 25};, you can access the name with obj.name or the age with obj['age'].

What if the property name has spaces or special characters?

In that case, you should use bracket notation. For example, if you have let obj = {'first name': 'Alice'};, you can access it with obj['first name'].

Can I access properties dynamically?

Yes, you can access properties dynamically using variables. For example, if you have a variable key = 'name';, you can access it with obj[key].

What happens if I try to access a property that doesn't exist?

If you try to access a property that doesn't exist, it will return undefined. For example, obj.nonExistentProperty will return undefined.