es6-arrow-functions Flashcards
1
Q
What is the syntax for defining an arrow function?
A
(parameters separated by commas) => {code block};
If there is only 1 parameter, the parentheses are not needed. If return is a simple expression, brackets and return keyword can be omitted (needed for multiline statements)
2
Q
When an arrow function’s body is left without curly braces, what changes in its functionality?
A
The body becomes a return statement
3
Q
How is the value of this determined within an arrow function?
A
An arrow function has lexical ‘this’; the value is determined by the surrounding scope (determined by the parent scope)
