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() => Stepan Parunashvili 1

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No more waiting 3

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Babel $ npm install -g babel-cli 4

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ES2015 5

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Arrow Functions () => 6

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Classes class Component {} 12

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Modules import User from 'user' 17

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Larger Standard Library Map, Set, WeakMap, Promise... 20

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Smarter Object Expressions {users} 21

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Destructuring in arguments ({name, friends}) => console.log(name, friends) 27

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Default Arguments (name = 'Bob') => console.log(name) 32

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Template Strings `hello ${name}` 35

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More destructuring var [first, ...rest] = users 38

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Splat addFriends(...friends) 44

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Block scoping: let & const let i = 0; 50

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Symbols Iterators Generators 57

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Async / Await var users = await getUsers(); 58

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Declarative > Imperative {opened ? : null} 66

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increment append, decrement, replace 73

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Now... 74

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Instead... 80

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(data) => markup 81

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Composability friends.map(friend => ) 86

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89 http://handlebarsjs.com/expressions.html

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Separation of Concerns? 91

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Coupling vs Cohesion 92

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Cohesion Click me 93

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ui logic + markup are cohesive 96

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Unit testing 98

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Reusability 99

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But, large apps are large 102

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Keep components small 103

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Keep state in a single place 104

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Optimize last 105

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Use Immutable Data Structures 106

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There's more 113

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flow redux hot reloading 114

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thank you :) 115