Syntax Error: TypeError: Cannot read properties of undefined (reading 'styles')

This error occurs when you try to access a property called 'styles' on an undefined variable. This means that the variable you are trying to access does not have a value assigned to it, or it is not an object that has a property called 'styles'.

To fix this error, you need to make sure that the variable you are trying to access is defined and has a value assigned to it before you try to access its properties. You can also check if the object has the 'styles' property before accessing it to avoid this error.

For example, instead of writing:

const element = document.getElementById('my-element');
console.log(element.styles.color);

You can write:

const element = document.getElementById('my-element');
if (element) {
  console.log(element.styles?.color);
}

This code checks if the 'element' variable is defined before accessing its 'styles' property. It also uses the optional chaining operator (?.) to check if the 'styles' property exists before accessing its 'color' property.