question Yang03

## 1.scss
<div class="ellips">
  <div class="dot"></div>
</div>


$pi: 3.14159265359;
$_precision: 10;

@function pow($base, $exp) {

## 1.scss
$pi: 3.14159265359;
$_precision: 10;

@function pow($base, $exp) {
  $value: $base;
  @if $exp > 1 {
    @for $i from 2 through $exp {
      $value: $value * $base;
    }
  }

## redux.js
const log = (store) => (next) => (action) {
    console.log('start')
    next(action)
    console.log('end')
}


function applayMiddleware (...middlewares) {
    return (createStore) {
        return (reducer, preloadedState,enhancer){

## index.html
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
  <style>
    #marquee {
      height:120px;
      overflow:hidden;

## decorator.js
function fnWrapDecorator(fn) {
  return (...args) => {
    return (target, propertyKey, descriptor) =>  {
      const fn = descriptor.value
      let wrappedFn = fn.applay(null, [fn, ...args])

      return {
        configurable: true,
        get() {
          return fn

## Object.defineProperty
var foo = {}
Object.defineProperty(foo, 'name', {
  configurable: true, //是否可以delete foo.delete
  enumerable: true, // 是否for in可以返回属性
  writable:true, //是否可以重新赋值
  value: 'kobe'
})

var descriptor = Object.getOwnPropertyDescriptor(foo, 'name')
console.log(descriptor.value)

## gist:b5e657f2f8b2a78695dc28ecc8391764
Element
document
window
XMLHttpRequest
...


onchange={(e:FormEvent<HTMLInputElement>) => {
  event.currentTarget
  const v = e.target.value  // property 'value' does not exit on type 'EventTarget'

## Block-Element-Modifier
.listing-item__title
.listing-item__item--active

// - 两个单词的链接
//__ element
// -- midifier

## JSON.stringify
var  obj = {a: 1, b:2}
console.log(JSON.stringify(obj)) // {"a":1,"b":1}

var obj1 = {
  a:1,
  b: function() {
    console.log(1)
  },
  c: undefined
}

## sinon
sinon  spies, stubs(stəb,存根), mocks

spies sinon.spy() //会调用原来的function
stubs //完全代替之前的function,不会执行原来的function
mocks  //和stubs一样，可以用来替换整个对象以改变其行为
	<div class="ellips">
	<div class="dot"></div>
	</div>



	$pi: 3.14159265359;
	$_precision: 10;

	@function pow($base, $exp) {
	const log = (store) => (next) => (action) {
	console.log('start')
	next(action)
	console.log('end')
	}


	function applayMiddleware (...middlewares) {
	return (createStore) {
	return (reducer, preloadedState,enhancer){
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width">
	<title>JS Bin</title>
	<style>
	#marquee {
	height:120px;
	overflow:hidden;
	function fnWrapDecorator(fn) {
	return (...args) => {
	return (target, propertyKey, descriptor) => {
	const fn = descriptor.value
	let wrappedFn = fn.applay(null, [fn, ...args])

	return {
	configurable: true,
	get() {
	return fn
	var foo = {}
	Object.defineProperty(foo, 'name', {
	configurable: true, //是否可以delete foo.delete
	enumerable: true, // 是否for in可以返回属性
	writable:true, //是否可以重新赋值
	value: 'kobe'
	})

	var descriptor = Object.getOwnPropertyDescriptor(foo, 'name')
	console.log(descriptor.value)
	Element
	document
	window
	XMLHttpRequest
	...


	onchange={(e:FormEvent<HTMLInputElement>) => {
	event.currentTarget
	const v = e.target.value // property 'value' does not exit on type 'EventTarget'
	.listing-item__title
	.listing-item__item--active

	// - 两个单词的链接
	//__ element
	// -- midifier
	var obj = {a: 1, b:2}
	console.log(JSON.stringify(obj)) // {"a":1,"b":1}

	var obj1 = {
	a:1,
	b: function() {
	console.log(1)
	},
	c: undefined
	}
	sinon spies, stubs(stəb,存根), mocks

	spies sinon.spy() //会调用原来的function
	stubs //完全代替之前的function,不会执行原来的function
	mocks //和stubs一样，可以用来替换整个对象以改变其行为