ES6新特性「建议收藏」

ES5
 
var first = 'Adrian';
var last = 'Mejia';
console.log('Your name is ' + first + ' ' + last + '.');

ES6
 
const first = 'Adrian';
const last = 'Mejia';
console.log(`Your name is ${first} ${last}.`);

var fn = function(name){
	return new Promise(function(resolve, reject){
		if(name == 'jack'){
			console.log('成功！：'+name);
			resolve();
		}else{
			console.log('失败！：'+name);
			reject();
		}
	})
}

fn('jack').then(function(){
	return fn('pola')
}).then(function(){
	return fn('tony')
}).then(function(){
	console.log("last")
})