ES6 写法示例

(function(){
  //dosth
})()

{
  //dosth
}

[1, 2, 3].map(function(each){
  return each * 2;
});

[1, 2, 3].map(each=> each * 2);
// 或
[1, 2, 3].map((each)=> each * 2);
// 或
[1, 2, 3].map((each) => {
    return each * 2;
});

var introSomeBody = fuction(name){
  name = name || 'Jack';
}

var introSomeBody = (name = 'Jack') => {
}

var sumFn = function(){
  var nums = [].slice.call(arguments);
  var sum = nums.reduce(function(prev, curr){
    return prev + curr;
  }, 0);
  return sum;
}

var sumFn = (...nums) => {
  return nums.reduce((prev, curr)=>{
    return prev + curr;
  }, 0);
}

var a1 = [1, 2]
var a2 = [0].concat(a1).concat(3)
doSth('abc'.split())
function doSth(x, y, z){}

var a1 = [1, 2]
var a2 = [0, ...a1, 3]
doSth(...'abc')
function doSth(x, y, z){}

var temp = a;
a = b;
b = a;

[a, b] = [b, a]

var introSomeBody = fuction(options){
  var name = options.name || 'Jack';
  var age = options.age || 18;
  console.log('I am %s, I am %d years old', name, age);
}

var introSomeBody = ({name = "Jack", age = 18}) => {
  console.log('I am %s, I am %d years old', name, age);
}

var data = {
    name: '新闻',
    news: {
        name: 'Bable升级到6啦',
        content: 'Bable在某年某月升级到6啦，哈哈哈'
    }
};
var html = (
'<div class="box">' +
  '<h2 class="box-header">${name}</h2>' +
  '<div class="box-body">' +
    '<h3>${newsName}<h3>' +
    '<div>${newsContent}</div>' +
  '</div>' +
'</div>').replace('${name}', data.name)
    .replace('${newsName}', data.news.name)
    .replace('${newsContent}', data.news.content);

var data = {
    name: '新闻',
    news: {
        name: 'Bable升级到6啦',
        content: 'Bable在某年某月升级到6啦，哈哈哈'
    }
};
var html = `
<div class="box">
  <h2 class="box-header">${data.name}</h2>
  <div class="box-body">
     <h3>${data.news.name}<h3>
     <div>${data.news.content}</div>
  </div>
</div>
`;