Dealing With Dependancies in JavaScript

Transcript

1. Dealing with dependencies
   in
   JavaScript
   (like a champ !)
   Radoslav Stankov 31/10/2019
   

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3. Radoslav Stankov
   @rstankov
   
   http://rstankov.com
   
   http://github.com/rstankov
   

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5. https://speakerdeck.com/rstankov
   

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8. open ./node_modules
   

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11. " JavaScript Fatigue
    

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16. What framework to use?
    How to manage state?
    How to fetch data?
    Which router to use?
    Which calendar component to use?
    Which chart component to use?

    ...
    #
    

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17. Agenda
    

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18. $ Dependency types
    % Picking dependencies
    & Handling dependencies
    

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19. Dependency types
    

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20. Medium
    easy

    to change
    Big
    Medium
    Small
    Medium
    Small
    Small
    Small
    Small Small
    hard
    to change
    simple complex
    * totally unscientific chart '
    

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21. Medium
    easy

    to change
    Big
    Medium
    Small
    Medium
    Small
    Small
    Small
    Small Small
    hard
    to change
    simple complex
    * totally unscientific chart '
    

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22. What framework to use?
    How to manage state?
    How to fetch data?
    Which router to use?
    Which calendar component to use?
    Which chart component to use?

    ...
    #
    

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23. What framework to use?
    How to manage state?
    How to fetch data?
    Which router to use?
    Which calendar component to use?
    Which chart component to use?

    ...
    #
    

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24. What ecosystem to choose?
    How to manage state?
    How to fetch data?
    Which router to use?
    Which calendar component use?
    Which chart component use?

    ...
    #
    

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25. What ecosystem to choose?
    How to manage state?
    How to fetch data?
    Which router to use?
    Which calendar component use?
    Which chart component use?

    ...
    #
    

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27. History of JS Ecosystem
    

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28. History of JS Ecosystem
    2005
    

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29. History of JS Ecosystem
    2005 2006
    

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30. History of JS Ecosystem
    2005 2010
    2006
    

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31. History of JS Ecosystem
    2005 2010
    2006
    

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32. History of JS Ecosystem
    2005 2013
    2010
    2006
    

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33. History of JS Ecosystem
    2005 2019
    2013
    2010
    2006
    

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37. What ecosystem to choose?
    How to manage state?
    How to fetch data?
    Which router to use?
    Which calendar component use?
    Which chart component use?

    ...
    #
    

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38. What ecosystem to choose?
    How to manage state?
    How to fetch data?
    Which router to use?
    Which calendar component use?
    Which chart component use?

    ...
    #
    

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39. Medium
    easy

    to change
    Big
    Medium
    Small
    Medium
    Small
    Small
    Small
    Small Small
    hard
    to change
    simple complex
    * totally unscientific chart '
    

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42. History of React Ecosystem
    2013 2019
    

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43. History of React Ecosystem
    2013 2019
    2014
    

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44. History of React Ecosystem
    2013 2019
    2014 2015
    

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45. History of React Ecosystem
    2013 2019
    2014 2015
    

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46. History of React Ecosystem
    2013 2019
    2014 2015 2016
    

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47. History of React Ecosystem
    2013 2019
    2014 2015 2016
    Concepts
    

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48. History of React Ecosystem
    2013 2019
    2014 2015 2016
    Libraries
    

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49. History of React Ecosystem
    2013 2019
    2014 2015 2016
    

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52. What ecosystem to choose?
    How to manage state?
    How to fetch data?
    Which router to use?
    Which calendar component use?
    Which chart component use?

    ...
    #
    

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53. Medium
    easy

    to change
    Big
    Medium
    Small
    Medium
    Small
    Small
    Small
    Small Small
    hard
    to change
    simple complex
    * totally unscientific chart '
    

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54. Picking Dependencies
    

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55. ⏹ Do we really need it?
    ⏹ Can something we already have do the task we are searching for?
    ⏹ Can we implement this ourselves?
    ⏹ Is this properly maintained?
    ⏹ Is it well documented?
    ⏹ When was the last version?
    ⏹ When was the last commit?
    ⏹ How often does it get a new version?
    ⏹ Does it have CHANGELOG?
    ⏹ Were there breaking changes recently?
    ⏹ Does it have security issues past or present?
    ⏹ How many dependencies does it come from?
    ⏹ What the dependency size?
    ⏹ What is its license?
    ⏹ Do you use this in any other project?
    ✅ Questions
    

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56. https://www.npmjs.com/package/lodash
    

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57. https://www.npmjs.com/package/lodash
    

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58. https://www.npmjs.com/package/draft-js
    

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59. https://github.com/facebook/draft-js
    

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60. https://github.com/facebook/draft-js/issues
    

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61. http://npm.broofa.com/?q=draft-js
    

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62. https://bundlephobia.com/result?p=draft-js@0.11.0
    

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64. Handling dependencies
    

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65. Who is developer worst enemy?
    

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66. * The designer
    Who is developer worst enemy?
    

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67. * The designer
    + The QA
    Who is developer worst enemy?
    

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68. * The designer
    + The QA
    , The sys admin
    Who is developer worst enemy?
    

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69. * The designer
    + The QA
    , The sys admin
    - The project owner
    Who is developer worst enemy?
    

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70. * The designer
    + The QA
    , The sys admin
    - The project owner
    . Santa
    Who is developer worst enemy?
    

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71. * The designer
    + The QA
    , The sys admin
    - The project owner
    . Santa
    / Code coupling
    Who is developer worst enemy?
    

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72. * The designer
    + The QA
    , The sys admin
    - The project owner
    . Santa
    / Code coupling
    Who is developer worst enemy?
    

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73. / Code coupling
    

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76. // pages/Home/index.js
    import * as React from 'react';
    import { Jumbotron } from 'react-bootstrap';
    import { Link } from 'react-router';
    import moment from 'moment';
    import styles from './styles.css';
    import globalStyles from 'styles/global.css';
    import classNames from 'classNames';
    import FancyTime from 'fancy-time'
    export default class Page extends React.Component {
    state = {
    time: new Date(),
    };
    componentDidMount() {
    this.interval = setInterval(this.updateTime, 1000);
    }
    componentWillUnmount() {
    clearInterval(this.interval);
    this.interval = null;
    }
    updateTime = () => {
    this.setState({ time: new Date() });
    }
    render() {
    const { time } = this.state.time;
    return (
    
    Conference
    
    

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77. export default class Page extends React.Component {
    state = {
    time: new Date(),
    };
    componentDidMount() {
    this.interval = setInterval(this.updateTime, 1000);
    }
    componentWillUnmount() {
    clearInterval(this.interval);
    this.interval = null;
    }
    updateTime = () => {
    this.setState({ time: new Date() });
    }
    render() {
    const { time } = this.state.time;
    return (
    
    Conference
    
    className={className(styles.clock, globalStyles.time)}
    datetime={moment(time).format()}>
    {moment(time).format('HH:mm')}
    
    Schedule
    Venue
    
    
    );
    }
    }
    

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78. Reasons for change
    

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79. Component
    Dependency Dependency Dependency
    

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80. Component
    Dependency Dependency Dependency
    Component Component
    Dependency Dependency
    

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81. Component
    Component Component
    Dependency
    nent Comp
    Dependency
    Dependency
    Dependency Dependency Dependency Dependency Dep
    cy
    

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82. Control changes
    

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83. Component
    Dependency Dependency
    

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84. Component
    Dependency Dependency
    Component
    

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85. Component
    Dependency Dependency
    Component
    Component Component
    

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86. Time
    Moment FancyTime
    Page
    Page Page
    

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87. export default class Page extends React.Component {
    state = {
    time: new Date(),
    };
    componentDidMount() {
    this.interval = setInterval(this.updateTime, 1000);
    }
    componentWillUnmount() {
    clearInterval(this.interval);
    this.interval = null;
    }
    updateTime = () => {
    this.setState({ time: new Date() });
    }
    render() {
    const { time } = this.state.time;
    return (
    
    Conference
    
    className={className(styles.clock, globalStyles.time)}
    datetime={moment(time).format()}>
    {moment(time).format('HH:mm')}
    
    Schedule
    Venue
    
    
    );
    }
    }
    

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88. export default class Page extends React.Component {
    state = {
    time: new Date(),
    };
    componentDidMount() {
    this.interval = setInterval(this.updateTime, 1000);
    }
    componentWillUnmount() {
    clearInterval(this.interval);
    this.interval = null;
    }
    updateTime = () => {
    this.setState({ time: new Date() });
    }
    render() {
    const { time } = this.state.time;
    return (
    
    Conference
    
    
    Schedule
    Venue
    
    
    );
    }
    }
    

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89. // components/Time/index.js
    import * as React from 'react';
    import classNames from 'classNames';
    import styles from './styles.css';
    import moment from 'moment';
    import FancyTime from 'fancy-time';
    export default function Time({ className, time }) {
    return (
    className={className(styles.time, className)}
    datetime={moment(time).format()}>
    {moment(time).format('HH:mm')}
    
    );
    }
    

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90. Time
    Moment FancyTime
    Page
    Page Page
    

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91. Time
    Utils FancyTime
    Page
    Page Page
    Moment
    

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92. // components/Time/index.js
    import * as React from 'react';
    import classNames from 'classNames';
    import styles from './styles.css';
    import { formatTime } from './utils';
    import FancyTime from 'fancy-time';
    export default function Time({ className, time }) {
    return (
    className={className(styles.time, className)}
    datetime={formatTime('full'}>
    {formatTime('clock')}
    
    );
    }
    // components/Time/utils.js
    import moment from 'moment';
    const FORMATS = {
    'full': null,
    'clock': 'HH:mm',
    };
    export function formatTime(time, kind) {
    const format = FORMATS[kind]
    return moment(time).format(format);
    }
    

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93. // pages/Home/index.js
    import * as React from 'react';
    import { Jumbotron } from 'react-bootstrap';
    import { Link } from 'react-router';
    import styles from './styles.css';
    import globalStyles from 'styles/global.css';
    import classNames from 'classNames';

    import Time from 'components/Time';
    export default class Page extends React.Component {
    state = {
    time: new Date(),
    };
    componentDidMount() {
    this.interval = setInterval(this.updateTime, 1000);
    }
    componentWillUnmount() {
    clearInterval(this.interval);
    this.interval = null;
    }
    updateTime = () => {
    this.setState({ time: new Date() });
    }
    render() {
    const { time } = this.state.time;
    return (
    
    Conference
    
    

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94. // pages/Home/index.js
    import * as React from 'react';
    import { Jumbotron } from 'react-bootstrap';
    import { Link } from 'react-router';
    import styles from './styles.css';
    import globalStyles from 'styles/global.css';
    import classNames from 'classNames';
    import Time from 'components/Time';
    import Clock from 'components/Clock';
    export default class Page extends React.Component {
    render() {
    return (
    
    Conference
    
    
    {(time) => }
    
    Schedule
    Venue
    
    
    );
    }
    }
    

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95. // pages/Home/index.js
    import * as React from 'react';
    import { Jumbotron } from 'react-bootstrap';
    import { Link } from 'react-router';
    import styles from './styles.css';
    import globalStyles from 'styles/global.css';
    import classNames from 'classNames';
    import Time from 'components/Time';
    import Clock from 'components/Clock';
    export default class Page extends React.Component {
    render() {
    return (
    
    Conference
    
    
    {(time) => }
    
    Schedule
    Venue
    
    
    );
    }
    }
    

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96. // pages/Home/index.js
    import * as React from 'react';
    import { Link } from 'react-router';
    import Time from 'components/Time';
    import Clock from 'components/Clock';
    import Jumbotron from 'components/Jumbotron';
    export default function Page() {
    return (
    
    
    {(time) => }
    
    Schedule
    Venue
    
    );
    }
    

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97. // paths.js
    export default {
    schedule() {
    return '/schedule';
    },
    venue() {
    return '/venue';
    }
    };
    

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98. // pages/Home/index.js
    import * as React from 'react';
    import { Link } from 'react-router';
    import paths from 'paths';
    import Time from 'components/Time';
    import Clock from 'components/Clock';
    import Jumbotron from 'components/Jumbotron';
    export default function Page() {
    return (
    
    
    {(time) => }
    
    Schedule
    Venue
    
    );
    }
    

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99. // pages/Home/index.js
    import * as React from 'react';
    import { Link } from 'react-router';
    import paths from 'paths';
    import Time from 'components/Time';
    import Clock from 'components/Clock';
    import Jumbotron from 'components/Jumbotron';
    export default function Page() {
    return (
    
    
    {(time) => }
    
    Schedule
    Venue
    
    );
    }
    

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100. // components/Link/index.js
     import { Link } from 'react-router';
     export default function Link({ to, className, children }) {
     return (
     {children}
     );
     }
     

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101. // components/Link/index.js
     import { Link } from 'found';
     export default function Link({ to, className, children }) {
     return (
     {children}
     );
     }
     

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105. Thanks 0
     

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106. https://speakerdeck.com/rstankov
     

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