Slide 1

Slide 1 text

Web Development: You’re (Still) Doing it Wrong Stefan Tilkov | innoQ | @stilkov Thursday 17 October 13

Slide 2

Slide 2 text

Annoying your users Thursday 17 October 13

Slide 3

Slide 3 text

Forbid the use of the back and forward buttons Thursday 17 October 13

Slide 4

Slide 4 text

Send them to the home page when they hit “refresh” Thursday 17 October 13

Slide 5

Slide 5 text

… or ensure the browser pops up a warning window Thursday 17 October 13

Slide 6

Slide 6 text

Make sure they can’t open a second browser window Thursday 17 October 13

Slide 7

Slide 7 text

Let them see UI chrome and ads first, content last Thursday 17 October 13

Slide 8

Slide 8 text

Make sure they can’t bookmark or send a link Thursday 17 October 13

Slide 9

Slide 9 text

Don’t let Google index anything Thursday 17 October 13

Slide 10

Slide 10 text

Ensure disabling JavaScript gives them a blank page Thursday 17 October 13

Slide 11

Slide 11 text

Things that seem like a good idea, but aren’t Thursday 17 October 13

Slide 12

Slide 12 text

Fix HTTP’s basic flaw: its statelessness Thursday 17 October 13

Slide 13

Slide 13 text

Go beyond the page model because we’re r/w now Thursday 17 October 13

Slide 14

Slide 14 text

Avoid CSS because who understands how it works? Thursday 17 October 13

Slide 15

Slide 15 text

Avoid HTML because that’s so 20th century Thursday 17 October 13

Slide 16

Slide 16 text

Avoid JavaScript because it’s not for real programmers Thursday 17 October 13

Slide 17

Slide 17 text

Go beyond Client/Server and introduce bidirectional, binary communication Thursday 17 October 13

Slide 18

Slide 18 text

Let’s take a step back Thursday 17 October 13

Slide 19

Slide 19 text

Let’s build a generic client runtime Define a protocol so it can work with any server Allow it to mix services from different backends Define a generic, declarative data format Separate content and layout Allow for extensibility with client-side scripting Make it work on any device, with any resolution Thursday 17 October 13

Slide 20

Slide 20 text

We’re not done yet Thursday 17 October 13

Slide 21

Slide 21 text

Standardize it, with (rough) consensus Ensure there are multiple client, server and intermediary implementations to choose from Have every client OS ship with an implementation of the generic client Let every programming environment support it Thursday 17 October 13

Slide 22

Slide 22 text

How hard can it be? Thursday 17 October 13

Slide 23

Slide 23 text

Competing with the Web may not be the best idea Thursday 17 October 13

Slide 24

Slide 24 text

My personal theory as to why things suck so much: Thursday 17 October 13

Slide 25

Slide 25 text

1. Hiding “Details” Thursday 17 October 13

Slide 26

Slide 26 text

2. Preserving Expertise Thursday 17 October 13

Slide 27

Slide 27 text

3. Misjudging Skills Thursday 17 October 13

Slide 28

Slide 28 text

Web-centric web UIs Thursday 17 October 13

Slide 29

Slide 29 text

Server-side components Avoid HTML, JS, CSS Trade Familiarity for Complexity Session-centric ROCA Server-side POSH Client-side components Web-centric Single Page Apps Advanced Client Frameworks Server-side REST APIs Thursday 17 October 13

Slide 30

Slide 30 text

ROCA (Resource-oriented Client Architecture) Thursday 17 October 13

Slide 31

Slide 31 text

Make your HTML semantic Thursday 17 October 13

Slide 32

Slide 32 text

CSS HTML Content Layout Thursday 17 October 13

Slide 33

Slide 33 text

Minimal load times Accessibility Self-descriptiveness Readability Thursday 17 October 13

Slide 34

Slide 34 text

“HTML?” “I don’t do that – I’m a programmer.” Thursday 17 October 13

Slide 35

Slide 35 text

Paris, France iPad 1 699 Thursday 17 October 13

Slide 36

Slide 36 text

Paris, France

  • iPad

    1

    699

cancel payment
Thursday 17 October 13

Slide 37

Slide 37 text

Data Data Access Business Rules Service Logic Service Interface WSDL SOAP WS-* XML Operations Parameters Messages HTTP JSON XML Resources Hypermedia Representations Thursday 17 October 13

Slide 38

Slide 38 text

Service Interface Service Interface Client Logic Thursday 17 October 13

Slide 39

Slide 39 text

Service Interface Service Interface Client Logic Thursday 17 October 13

Slide 40

Slide 40 text

Service Interface Service Interface Client Logic Thursday 17 October 13

Slide 41

Slide 41 text

Service Interface Service Interface Presentation Logic Orchestration Logic Thursday 17 October 13

Slide 42

Slide 42 text

Orchestration Logic Orchestration Logic Presentation Logic Thursday 17 October 13

Slide 43

Slide 43 text

Business Logic Business Logic Presentation Logic Thursday 17 October 13

Slide 44

Slide 44 text

Use Javascript unobtrusively Thursday 17 October 13

Slide 45

Slide 45 text

Some Link Thursday 17 October 13

Slide 46

Slide 46 text

Some Link Thursday 17 October 13

Slide 47

Slide 47 text

Some Link Thursday 17 October 13

Slide 48

Slide 48 text

Some Link Thursday 17 October 13

Slide 49

Slide 49 text

$("a.whatever").click(function() { doSomething(this.href); }); + Some Link Thursday 17 October 13

Slide 50

Slide 50 text

Proin elit arcu, rutrum commodo, vehicula ...

Morbi tincidunt, dui sit amet facilisis feugiat, odio ...

Mauris eleifend est et turpis. Duis id erat ...

$("#tabs").tabs(); + Thursday 17 October 13

Slide 51

Slide 51 text

Thursday 17 October 13

Slide 52

Slide 52 text

$('.multiselect', context).each(function() { $(this).multiselect({ selectedList: 2, checkAllText: "Alle", uncheckAllText: "Keinen" }).multiselectfilter({label:"", width:"200px"}); });
Project DISCOVER IMPROVE MAGENTA ROCA ROCKET
Thursday 17 October 13

Slide 53

Slide 53 text

CSS HTML Content Layout Thursday 17 October 13

Slide 54

Slide 54 text

JavaScript CSS HTML Content Behavior Layout Thursday 17 October 13

Slide 55

Slide 55 text

JS component JS glue code HTML Events Methods Component 2 Component 3 ... Layout/CSS styles styles Server / Backend Ajax initializes Base Markup responds with Thursday 17 October 13

Slide 56

Slide 56 text

Or: Just go the SPA way … Thursday 17 October 13

Slide 57

Slide 57 text

Application Browser Google GET / application/json Filter GET / text/html text/html GET / application/json JS-to-HTML Thursday 17 October 13

Slide 58

Slide 58 text

Thursday 17 October 13

Slide 59

Slide 59 text

Use URIs to identify a single meaningful concept Thursday 17 October 13

Slide 60

Slide 60 text

A http://.../A Thursday 17 October 13

Slide 61

Slide 61 text

A B C http://.../A ? Thursday 17 October 13

Slide 62

Slide 62 text

A http://.../A C http://.../C B http://.../B b c + AJAX + CSS Thursday 17 October 13

Slide 63

Slide 63 text

A B C http://.../A Thursday 17 October 13

Slide 64

Slide 64 text

Don’t disable Browser Features – use them Thursday 17 October 13

Slide 65

Slide 65 text

Multiple tabs & windows Bookmarks Back/Forward/Refresh Personalization Menus Thursday 17 October 13

Slide 66

Slide 66 text

ROCA http://roca-style.org/ Thursday 17 October 13

Slide 67

Slide 67 text

Now get serious, please. When to use what? Thursday 17 October 13

Slide 68

Slide 68 text

Pure JavaScript Programming Model Server-side data API “Closed”, desktop-style app Browser as portable runtime platform Offline capability Single Page Apps: Good reasons Thursday 17 October 13

Slide 69

Slide 69 text

“That’s how you do it in 2013” “Progressive enhancement is dead” Required for modern, interactive UIs Single Page Apps: Bad reasons Thursday 17 October 13

Slide 70

Slide 70 text

RESTfulness Accessibility ROCA: Bad reasons Thursday 17 October 13

Slide 71

Slide 71 text

Use of browser features General web affinity Separation of concerns Front-end integration Technology independence SEO ROCA: Good reasons Thursday 17 October 13

Slide 72

Slide 72 text

In summary … Thursday 17 October 13

Slide 73

Slide 73 text

Not everything new is good, not everything old is bad. (Surprise.) Thursday 17 October 13

Slide 74

Slide 74 text

Don’t repeat the mistakes we used to make on the server on the client. Thursday 17 October 13

Slide 75

Slide 75 text

Learning details of how the web works might be time well spent. Thursday 17 October 13

Slide 76

Slide 76 text

Working with the web is a lot easier than fighting it. Thursday 17 October 13

Slide 77

Slide 77 text

Q&A Stefan Tilkov, @stilkov [email protected] Phone: +49 170 471 2625 innoQ Deutschland GmbH Krischerstr. 100 40789 Monheim am Rhein Germany Phone: +49 2173 3366-0 innoQ Schweiz GmbH [email protected] Gewerbestr. 11 CH-6330 Cham Switzerland Phone: +41 41 743 0116 www.innoq.com Ohlauer Straße 43 10999 Berlin Germany Phone: +49 2173 3366-0 Robert-Bosch-Straße 7 Germany Phone: +49 2173 3366-0 Radlkoferstraße 2 D-81373 München Telefon +49 (0) 89 741185-270 Thursday 17 October 13