functions.js

/* -- Arrow function expression -- */
=>
() =>
x => x * x
params  => ({foo: bar})
(p1, p2) => { return p1 + p2; }

foo =  a => {}
foo = (p1, p2) =>{}
obj.foo = (p1, p2) =>{}


/* -- Rest parameter -- */
(...args) => args[0
function(a, b, ...theArgs) {}


/* -- ES6 method definitions -- */
{
  foo() {},
  write("){"){};
}
write("){");


/* -- Default parameters -- */
function f (a = _ => _) {}
function callSomething(thing = this.something()) { return thing }
multiply = (p1, p2=1) => p1 * p2


/* -- Comments -- */
x  => /* */ {}
x  =>
// abc
{}
.foo = x => /* */ {}
.foo = x =>
// abc
{}
function /* */ foo(){}
function
// abc
foo(){}


/* -- Other -- */
function(){}
function foo(){}
function*(){}
function* foo(){}
async function (){}
async function foo(){}

foo = function(){}
foo = function foo(){}
foo = function*(){}
foo = function* foo(){}
foo = async function(){}
foo = async function foo(){}

obj.foo = function(){}
obj.foo = function foo(){}
obj.foo = function*(){}
obj.foo = function* foo(){}
obj.foo = async function(){}
obj.foo = async function foo(){}

obj.prototype.foo = function(){}
obj.prototype.foo = function foo(){}
obj.prototype.foo = function*(){}
obj.prototype.foo = function* foo(){}
obj.prototype.foo = async function(){}
obj.prototype.foo = async function foo(){}

foo: function(){}
foo: function foo(){}
foo: function*(){}
foo: function* foo(){}
foo: async function (){}
foo: async function foo(){}

'foo': function(){}
'foo': function foo(){}
'foo': function*(){}
'foo': function* foo(){}
'foo': async function (){}
'foo': async function foo(){}

"foo": function(){}
"foo": function foo(){}
"foo": function*(){}
"foo": function* foo(){}
"foo": async function (){}
"foo": async function foo(){}