Learning JavaScript

...and Staying Marketable

Kent C. Dodds

Utah

1 wife, 3 kids

PayPal Inc.

@kentcdodds

@kentcdodds

Please Stand...

Just Kidding...

What this talk is not

  • Live coded (for once)
  • All about Angular
  • Bashing Angular 1
  • Praising Angular 2

What this talkΒ is

  • Praising JavaScript
  • Showing how learning JS will help you today and in the future
  • Showing how you can do more JavaScript with Angular (1 and 2)

Let's get started...

History of JS Frameworks

But... It's not all just about what's widely used

We need to get and enjoy our jobs too!

Fun story... React didn't even make this list!

  • jQuery: 399
  • Backbone: 195
  • Bootstrap: 135
  • Ember: 101
  • Knockout: 51
  • YUI: 8
  • MooTools: 1

Jobs...

What are your Angular 1 skills going to matter...

...when Angular 2 is released?

Actually, quite a lot!

For a year or two...

Learn JavaScript!

While doing your all of your Angular goodness

Requirement:

You need modules (ES6, CommonJS, etc.)

Let's see what Angular 1 looks like

With a focus on JavaScript

// emoji.filter.js
angular.module('emojiApp')
  .filter('emoji', emojiFilter)

function emojiFilter(emojiMap) {
  return emojify

  function emojify(emojiCode) {
    return emojiMap[emojiCode] || emojiMap.confused
  }
}

// emoji.filter.test.js
describe('emoji filter', function() {
  beforeEach(module('emojiApp'))

  var emojiFilter

  beforeEach(inject($filter) {
    emojiFilter = $filter('emoji')
  })

  it('should default to the confused emoji', function() {
    expect(emojiFilter()).to.equal('πŸ˜•')
    expect(emojiFilter('gibberish')).to.equal('πŸ˜•')
  })

  it('should return the right emoji for the emoji code', function() {
    expect(emojiFilter('cherries')).to.equal('πŸ’')
  })
})
// emoji-getter.js

export default emojiGetter

function emojiGetter(emojiMap) {
  return emojify

  function emojify(emojiCode) {
    return emojiMap[emojiCode] || emojiMap.confused
  }
}

// emoji-getter.test.js
import emojiGetter from './emoji-getter'
import emojiMap from './emoji-map'
const getEmoji = emojiGetter(emojiMap)

describe('emoji-getter', function() {
  it('should default to the confused emoji', function() {
    expect(emojiFilter()).to.equal('πŸ˜•')
    expect(emojiFilter('gibberish')).to.equal('πŸ˜•')
  })

  it('should return the right emoji for the emoji code', function() {
    expect(emojiFilter('cherries')).to.equal('πŸ’')
  })
})

// emoji.filter.js
import angular from 'angular'
import emojiGetter from './emoji-getter'
import emojiMap from './emoji-map'

angular.module('emojiApp')
  .filter('emoji', () => emojiGetter(emojiMap))

// emoji.factory.js
import angular from 'angular'
import emojiGetter from './emoji-getter'
import emojiMap from './emoji-map'

angular.module('emojiApp')
  .factory('emoji', emojiGetter(emojiMap))
// emojiUtils.factory.js

angular.module('emojiApp')
  .factory('emojiUtils', emojiUtils)

function emojiUtils() {
  return {flatten}

  function flatten(array) {
    return array.reduce((a, b) => a.concat(b), [])
  }
}

// emojiUtils.factory.test.js
describe('emojiUtils', function() {
  beforeEach(module('emojiApp'))

  var emojiUtils

  beforeEach(inject(function(_emojiUtils_) {
    emojiUtils = _emojiUtils_
  }))

  describe('flatten', function() {
    const {flatten} = emojiUtils

    it('should flatten an array', function() {
      const input = [[1], [2, 3], [4]]
      const result = [1, 2, 3, 4]
      expect(flatten(input)).to.deep.equal(result)
    })
  })
})
// emojiUtils.js
export default {flatten}

function flatten(array) {
  return array.reduce((a, b) => a.concat(b), [])
}

// emojiUtils.test.js
import emojiUtils from './emojiUtils'
describe('emojiUtils', function() {

  describe('flatten', function() {
    const {flatten} = emojiUtils

    it('should flatten an array', function() {
      const input = [[1], [2, 3], [4]]
      const result = [1, 2, 3, 4]
      expect(flatten(input)).to.deep.equal(result)
    })
  })
})

// emojiUtils.factory.js
import angular from 'angular'
import emojiUtils from './emojiUtils'
angular.module('emojiApp')
  .factory('emojiUtils', () => emojiUtils)
// emoji-chooser.directive.js
angular.module('emojiApp')
  .factory('emojiChooser', emojiChooser)

function emojiChooser() {
  return {
    template: `
      <div>
        {{::'some.translation.key' | translate}}
        <!-- more stuff -->
      </div>
    `,
    // more stuff
  }
}
// emoji-chooser.directive.after.js
import translations from 'my-translation-module'

angular.module('emojiApp')
  .factory('emojiChooser', emojiChooser)

function emojiChooser() {
  return {
    template: `
      <div>
        ${translations('some.translation.key')}
        <!-- more stuff -->
      </div>
    `,
    // more stuff
  }
}

Resources...

Thank You!

Learning JavaScript

By Kent C. Dodds

Learning JavaScript

The value of Learning JavaScript and staying marketable. A talk for ng-nebraska

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