Responsive Web Bloopers at Viki

Mobile Era 2017

@renettarenula

Aysha Anggraini

@renettarenula

aysha.me

codepen.io/rrenula

Working Together
Writing Code
Testing Site

Blooper #1: Working Together

Lack of collaboration between designers & developers

Designer

Engineer

Designer

Engineer

Designer

Engineer

Time loss

Problems Found!

Designer

Engineer

Designer

Engineer

Designer

Engineer

Designer

Engineer

Problems Found!

Designer

Engineer

Fancy Animations
Big Images
Intricate Layouts

1. Limitations of design

Episode

Clips

Trailers

Episode

Clips

Trailers

Episode

Clips

Trailers

Episode

Clips

Trailers

2. Weakness of mockups

Performance?
Interaction types?

“The correlation between screen size and input type is quickly blurring. There is no longer any guarantee that small screens equal touch and large screens equal mouse.”

- Tom Maslan

Discovered problems late
Hacks & Shortcuts
Last minute feature

3. Shortcomings

Design

Mocks

Develop &

Test

Beta Testers

Bug fixes, etc.

Rollout!

Previous Workflow

Time loss

No time for feature request

Collaborative Workflow!

Low-fidelity mockups

Designer

Engineer

Low-fidelity mockups

Feedback

Designer

Engineer

Prototype!

Low-fidelity mockups

High-fidelity mockups

Feedback

Designer

Engineer

Prototype

Don't prototype everything
Build fast, build ugly

Design

Mocks

Develop &

Test

Beta Testers

Bug fixes, etc.

Rollout!

Prototype!

Less time loss

Feature Request

Blooper #2: Writing Code

Lack of planning on development

// nested media queries
.modal-submit-channel {
    width: 580px;

    @media #{$respond-media} {
        width: 780px;
    }
}

// un-nested media queries
.slides-vertical {
    position: relative;

    .slides-wrapper {
        height: 298px;
        overflow: hidden;
    }
}

@media #{$respond-wide} {
    .slides-vertical {
        .slides-wrapper {
            height: 386px;
        }
    }
}

Inconsistent ways of writing media queries

// mobile first CSS
.modal-submit-channel {
    width: 580px;

    @media #{$group-large} {
        width: 780px;
    }
}

// non-mobile first CSS
@media #{$group-small} {
    .pagination {
        width: 100%;

        li.prev,
        li.next {
            width: 100%;
        }

        li.pages {
            width: 80%;
        }
    }
}

Inconsistent paradigm in writing CSS

Planning: Browsers & Devices

Decide on supported browsers & devices early

Browsers & Devices

Design within constraints
Device specific issues

Device Bugs

by Scott Jehl

https://github.com/scottjehl/Device-Bugs

Planning: Coding Styleguides

Decide on conventions early

Coding conventions

Naming conventions
Nesting levels
Media Queries

SCSS Lint

https://github.com/brigade/scss-lint

Planning: Beware of CSS Frameworks

CSS Frameworks

CSS Bloats
Rigid Styling
Unsuitable

Maintenance: Create Styleguide

Maintain standards that you have set previously

https://www.viki.com/styleguide

Styleguide

Promote re-use
Faster development
Better on-boarding for new engineers

Caution!

Requires Discipline

Hologram

https://github.com/trulia/hologram

Maintenance: Get with the times

Use new features to maintain components

CSS Grid

Better layout system
Simpler than current grid-based frameworks
Not affected by source order of HTML

<div class="row">
    <div class="col s12">
        <div class="header"></div>
    </div>
</div>

<div class="row">
    <div class="col s12 l8">
        <div class="about"></div>
    </div>
    <div class="col s12 l4">
        <div class="episodes"></div>
    </div>
</div>

Current grid system

Row wrappers
Floats clearing
Complicated Markup

<!-- HTML -->
<div class="wrapper">
    <div class="header"></div>
    <div class="about"></div>
    <div class="episodes"></div>
</div>

CSS Grid

No row wrappers
CSS instead of HTML
Simpler Markup

.wrapper {
    grid-template-columns: repeat(2, 1fr);
    grid-gap: 20px;
    display: grid;
}

.header {
    grid-column: 1fr;
}

What about browser support?

Think of layout as an enhancement

@supports

Feature Queries

// fallback code for older browsers

@supports (display: grid) {
    // code for newer browsers
    // including overrides of the code above
}

Using Feature Queries in CSS

by Jen Simmons

https://hacks.mozilla.org/2016/08/using-feature-queries-in-css/

Grid by Example

by Rachel Andrew

https://gridbyexample.com/

Blooper #3: Testing Site

Testing late on devices and relying too much on emulators

Device Testing

Testing Interactions
Bugs & Quirks on mobile

Build UI Components

Deploy to Staging

QA Test

Trivial Bugs!

Build UI Components

Connect to device

Repeat

Staging & QA Test

Reference: http://stackoverflow.com/questions/11005540/localhost-running-on-mac-can-i-view-it-on-my-android-phone

Trivial Bugs!

Localtunnel

Proxylocal

Ghostlab

GIF Credit: Addy Osmani

Drawbacks

Lazy loaded item
False Positive
Slow

Workaround

Lazy loaded items
- Increase Timeouts
False Positive
- Testing env with consistent data
Slow
- Limit Testing

Current Project: Optimizing Site

Did not focus on performance earlier

Prior Performance

Start Render

2.8s

Desktop

Start Render

13.8s

Mobile

Performance on both desktop and mobile before improvements are made

Fully Loaded

23.4s

Fully Loaded

48.2s

Content Sizes

5881KB

Content Sizes

6229KB

Deferring Scripts: Load resource lazily

Improves the start render time on mobile device

Define Fallback & Web Fonts in CSS (@font-face)

Load fonts dynamically & use it

Leverage browser cache to prevent FOUT

Deferring Scripts: Loading Fonts

Web Font Loading Patterns

by Bram Stein

https://www.bramstein.com/writing/web-font-loading-patterns.html

Comprehensive Guide to Font Loading Strategy

by Zach Leatherman

https://www.zachleat.com/web/comprehensive-webfonts/

CSS Font-Display

https://developer.mozilla.org/en-US/docs/Web/CSS/@font-face/font-display

Deferring Scripts: Async or Defer Scripts

Async — Scripts with no dependencies

Defer — Scripts with dependencies; Execution order matters

Video Page: Deferring Scripts

Start Render

13.8s

Start Render

4.9s

64% Faster

Speed improvement on mobile devices

Serve images correctly: Responsive image tag

Serve image according to user's screen size

// CSS
.responsive-img {
    max-width: 100%;
    height: auto;
    width: 100%;
}

<!-- HTML -->
<img src="image.png" class="responsive-img" />

VS.

<img srcset="image-480.jpg 480w, 
             image-640.jpg 640w, 
     sizes="(max-width: 400px) 100vw, 
            (max-width: 960px) 75vw, 
            640px" 
     src="image-640.jpg" alt="Image">

The anatomy of responsive images

by Jake Archibald

https://jakearchibald.com/2015/anatomy-of-responsive-images/

Lazy loading: Images

Load images only when users needs it

Lazysizes

https://github.com/aFarkas/lazysizes

Homepage: Lazy load images

Content Sizes

6229KB

Content Sizes

2181KB

65% Lower

Content Request on mobile devices

Homepage: Lazy load images

Fully loaded

48.2s

Fully loaded

28.9s

40% Faster

Speed improvement on mobile devices

Essential Image Optimization

by Addy Osmani

https://images.guide/

Google Lighthouse

Network level optimizations
PWAs
...many more

Performance: An ongoing process

@renettarenula

aysha.me

codepen.io/rrenula

Thank You!

http://slides.com/renaysha/responsive-web-bloopers-at-viki/

Responsive Web Bloopers at Viki

Working Together

Writing Code

Testing Site

Blooper #1: Working Together

Lack of collaboration between designers & developers

Fancy Animations

Big Images

Intricate Layouts

1. Limitations of design

2. Weakness of mockups

Performance?

Interaction types?

“The correlation between screen size and input type is quickly blurring. There is no longer any guarantee that small screens equal touch and large screens equal mouse.”

- Tom Maslan

Discovered problems late

Hacks & Shortcuts

Last minute feature

3. Shortcomings

Previous Workflow

Collaborative Workflow!

Prototype

Don't prototype everything

Build fast, build ugly

Blooper #2: Writing Code

Lack of planning on development

Inconsistent ways of writing media queries

Inconsistent paradigm in writing CSS

Planning: Browsers & Devices

Decide on supported browsers & devices early

Browsers & Devices

Design within constraints

Device specific issues

Device Bugs

by Scott Jehl

Planning: Coding Styleguides

Decide on conventions early

Coding conventions

Naming conventions

Nesting levels

Media Queries

SCSS Lint

Planning: Beware of CSS Frameworks

CSS Frameworks

CSS Bloats

Rigid Styling

Unsuitable

Maintenance: Create Styleguide

Maintain standards that you have set previously

https://www.viki.com/styleguide

Styleguide

Promote re-use

Faster development

Better on-boarding for new engineers

Caution!

Requires Discipline

Hologram

Maintenance: Get with the times

Use new features to maintain components

CSS Grid

Better layout system

Simpler than current grid-based frameworks

Not affected by source order of HTML

Current grid system

Row wrappers

Floats clearing

Complicated Markup

CSS Grid

No row wrappers

CSS instead of HTML

Simpler Markup

What about browser support?

Think of layout as an enhancement

@supports

Feature Queries

Using Feature Queries in CSS

by Jen Simmons

Grid by Example

by Rachel Andrew

Blooper #3: Testing Site