ES6语法糖
2017-10-26
var events = { listeners, listen }
等同
var events = { listeners: listeners, listen: listen }
var expertise = "name"
var person = {
b:1
}
person[expertise] = "aa"
等同
var expertise = 'name' var person = { b:1, [expertise]:"aa" }
var emitter = {
events: {},
on: function (type, fn) {
}
}
等同
var emitter = { events: {}, on(type, fn) { } }
var example = function (parameters) { // function body }
等同
var example = (parameters) => { // function body }
当只有一个参数时,等同
var example = parameters => { return parameters * 2 }
直接return时,等同
var example = parameters => parameters * 2
var pseudonym = character.pseudonym
等同
var { pseudonym } = character
var alias = character.pseudonym
等同
var { pseudonym: alias } = character
var gender = character.metadata.gender
等同
var { metadata: { gender } } = character
var names = ['James', 'L.'] var [ firstName = 'John', , lastName = 'Doe' ] = names
等同
var names = ['James', 'L.']; var firstName = names[0]||'John'; var lastName = names[2]||'Doe';
var left = 5, right = 7; var aux = left left = right right = aux
等同
var left = 5, right = 7; [left, right] = [right, left]
function join() { var list = Array.prototype.slice.call(arguments) return list.join(', ') } join('first', 'second', 'third')
等同
function join(...list) { return list.join(', ') } join('first', 'second', 'third')