arrow-function-ES6_syntax-caveats.js

const func1 = (x, y) // SyntaxError
=> {
    return x + y;
};
const func2 = (x, y) => // OK
{
    return x + y;
};
const func3 = (x, y) => { // OK
    return x + y;
};

const func4 = (x, y) // SyntaxError
=> x + y;
const func5 = (x, y) => // OK
x + y;


// Line breaks inside parameter definitions are OK:

const func6 = ( // OK
    x,
    y
) => {
    return x + y;
};