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- ReferenceError: "x" is not defined
- Wrong scope
- Valid cases
- Update older browsers
- SyntaxError: a declaration in the head of a for-of loop can't have an initializer
- Valid for-of loop
- SyntaxError: arguments is not valid in fields
- TypeError: 'x' is not iterable
- Iterating over Object properties
- Iterating over a generator
- Iterating over a custom iterable
- TypeError: can't assign to property "x" on "y": not an object
- Common JavaScript Errors: ReferenceError, SyntaxError, and TypeError Quiz 5 questions
Well done!
You have completed (UPI) Chapter 11: Managing Errors, Debugging, and Handling Events in JavaScript!
Instruction
Wrong scope
A variable needs to be available in the current context of execution. Variables defined inside a function cannot be accessed from anywhere outside the function, because the variable is defined only in the scope of the function.
function numbers() {
const num1 = 2;
const num2 = 3;
return num1 + num2;
}
console.log(num1); // ReferenceError: num1 is not defined.
However, a ...