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CSMess to OOCSS: Refactoring CSS with Object Oriented Design
- 1. CSMESS TO OOCSS Refactoring CSS With Object Oriented Design
- 2. Kate Travers // kate@flatironschool.com // @kttravers // github: ktravers
- 5. └── assets └── stylesheets ├── admissions │ ├── index.scss │ └── show.scss ├── lessons │ ├── index.scss │ └── show.scss ├── shared │ ├── _fonts.scss │ ├── _vars.scss │ ├── _mixins.scss │ ├── footer.scss │ ├── header.scss │ └── nav.scss ├── application.scss ├── admissions.scss ├── lessons.scss ├── shared.scss etc...
- 6. #lesson-show { position: fixed; width: auto; top: 10px; left: 80px; z-index: 10; .title { margin-top: 0; vertical-align: middle; } .btn-row { line-height: 1; padding-left: 15px; background-color: $light-gray; margin-bottom: 4px; margin-left: 8px; } /* etc... */ } └── assets └── stylesheets ├── admissions │ ├── index.scss │ └── show.scss ├── lessons │ ├── index.scss │ └── show.scss ├── shared │ ├── _fonts.scss │ ├── _vars.scss │ ├── _mixins.scss │ ├── footer.scss │ ├── header.scss │ └── nav.scss ├── application.scss ├── admissions.scss ├── lessons.scss ├── shared.scss etc...
- 7. └── assets └── stylesheets ├── admissions │ ├── index.scss │ └── show.scss ├── lessons │ ├── index.scss │ └── show.scss ├── shared │ ├── _fonts.scss │ ├── _vars.scss │ ├── _mixins.scss │ ├── footer.scss │ ├── header.scss │ └── nav.scss ├── application.scss ├── admissions.scss ├── lessons.scss ├── shared.scss etc... LEARN_V1 NATIVE 213 stylesheets 1.3 MB VENDOR 116 stylesheets 848 KB TOTAL 329 stylesheets 2.1 MB
- 10. MODULAR Coupled to single view ENCAPSULATED MAINTAINABLE
- 11. MODULAR Coupled to single view Too brittle / specific to re-use ENCAPSULATED MAINTAINABLE
- 12. MODULAR Coupled to single view Too brittle / specific to re-use ENCAPSULATED MAINTAINABLE
- 13. MODULAR Coupled to single view Too brittle / specific to re-use ENCAPSULATED Specificity wars MAINTAINABLE
- 14. MODULAR Coupled to single view Too brittle / specific to re-use ENCAPSULATED Specificity wars Unpredictable behavior MAINTAINABLE
- 15. MODULAR Coupled to single view Too brittle / specific to re-use ENCAPSULATED Specificity wars Unpredictable behavior MAINTAINABLE
- 16. MODULAR Coupled to single view Too brittle / specific to re-use ENCAPSULATED Specificity wars Unpredictable behavior MAINTAINABLE Writing new CSS for every view
- 17. MODULAR Coupled to single view Too brittle / specific to re-use ENCAPSULATED Specificity wars Unpredictable behavior MAINTAINABLE Writing new CSS for every view Difficult to onboard new team members
- 18. SOLUTION?
- 20. OFF-THE-SHELF ROLL YOUR OWN
- 21. OFF-THE-SHELF ROLL YOUR OWN Heavy
- 22. OFF-THE-SHELF ROLL YOUR OWN Heavy Lightweight
- 23. OFF-THE-SHELF ROLL YOUR OWN Heavy Lightweight
- 24. OFF-THE-SHELF ROLL YOUR OWN Heavy Lightweight Override-able
- 25. OFF-THE-SHELF ROLL YOUR OWN Heavy Lightweight Override-able Extensible
- 26. OFF-THE-SHELF ROLL YOUR OWN Heavy Lightweight Override-able Extensible
- 27. OFF-THE-SHELF ROLL YOUR OWN Heavy Lightweight Override-able Extensible Third-party maintainers
- 28. OFF-THE-SHELF ROLL YOUR OWN Heavy Lightweight Override-able Extensible Third-party maintainers Internally maintained
- 29. OFF-THE-SHELF ROLL YOUR OWN Heavy Lightweight Override-able Extensible Third-party maintainers Internally maintained
- 30. CASE STUDY: Flatiron School’s Learn CSS Framework
- 31. ROADMAP
- 32. 1. Take visual inventory of app’s UI/UX ROADMAP
- 33. 1. Take visual inventory of app’s UI/UX 2. Build component OOCSS library ROADMAP
- 34. 1. Take visual inventory of app’s UI/UX 2. Build component OOCSS library 3. Rewrite CSS and markup ROADMAP
- 35. 1. Take visual inventory of app’s UI/UX 2. Build component OOCSS library 3. Rewrite CSS and markup 4. Onboard your team ROADMAP
- 41. multi-part container with borders and white background
- 43. multi-part container with text sitting next to media
- 45. circular object with image
- 46. STEP 2: COMPONENT LIBRARY STEP 2: Component Library
- 48. .site-header .site-sidebar.site-main LAYOUT >> CONTAINER COMPONENTS .site-subheader .site-banner .module .media-block .media-block .media-block .media-block
- 49. .site-header .site-sidebar.site-main LAYOUT >> CONTAINER >> OBJECT COMPONENTS .site-subheader .site-banner .module .media-block .media-block .media-block .media-block .image .text-block .button
- 50. .site-header .site-sidebar.site-main LAYOUT >> CONTAINER >> OBJECT >> GLOBAL COMPONENTS .site-subheader .site-banner .module .media-block .media-block .media-block .media-block .image .text-block .button.util--pull-right
- 51. Modular components defined through strong naming conventions
- 54. Compartmentalized Limited/single responsibility Complexity through combination Portable MODULAR COMPONENTS
- 55. Compartmentalized Limited/single responsibility Complexity through combination Portable Interchangeable from view to view MODULAR COMPONENTS
- 56. Compartmentalized Limited/single responsibility Complexity through combination Portable Interchangeable from view to view Components don’t affect parent or relative styles MODULAR COMPONENTS
- 58. Generic class names STRONG NAMING CONVENTIONS
- 59. Generic class names Semantic syntax STRONG NAMING CONVENTIONS
- 61. /* Block component */ .list /* Child element of parent block */ .list__card /* Modifier that changes the style of the block */ .list--accordion .list--spacing-large
- 62. └── assets └── stylesheets ├── layout │ ├── site-header.scss │ ├── site-footer.scss │ └── site-main.scss ├── containers │ ├── list.scss │ ├── media-block.scss │ └── module.scss ├── objects │ ├── button.scss │ ├── image-frame.scss │ └── input.scss ├── global │ ├── special.scss │ ├── typography.scss │ └── vars.scss └── application.scss
- 63. STEP 3: Rewrite
- 64. multi-part container with text sitting next to media
- 66. /* * Overall Rules */ .media-block { display: table; } /* * Local Descendants */ .media-block__content { display: table-cell; vertical-align: middle; } .media-block__media { display: table-cell; vertical-align: middle; padding-right: $content-spacing; }
- 67. /* * Overall Rules */ .media-block { display: table; } /* * Local Descendants */ .media-block__content { display: table-cell; vertical-align: middle; } .media-block__media { display: table-cell; vertical-align: middle; padding-right: $content-spacing; } .media-block .media-block__content.media-block__media
- 68. /* * Overall Rules */ .media-block { display: table; } /* * Local Descendants */ .media-block__content { display: table-cell; vertical-align: middle; } .media-block__media { display: table-cell; vertical-align: middle; padding-right: $content-spacing; } <!-- Start by outlining the basic container + objects --> <div class="media-block"> <div class="media-block__media"> <!-- circle with user’s profile picture --> </div> <div class="media-block__content"> <!-- text object: user name --> <!-- text object: time ago --> <!-- text object: action completed by user --> </div> </div>
- 69. /* * Overall Rules */ .media-block { display: table; } /* * Local Descendants */ .media-block__content { display: table-cell; vertical-align: middle; } .media-block__media { display: table-cell; vertical-align: middle; padding-right: $content-spacing; } <!-- Start by outlining the basic container + objects --> <div class="media-block"> <div class="media-block__media"> <!-- circle with user’s profile picture --> </div> <div class="media-block__content"> <!-- text object: user name --> <!-- text object: time ago --> <!-- text object: action completed by user --> </div> </div>
- 70. /* * Overall Rules */ .media-block { display: table; } /* * Local Descendants */ .media-block__content { display: table-cell; vertical-align: middle; } .media-block__media { display: table-cell; vertical-align: middle; padding-right: $content-spacing; } <div class="media-block"> <div class="media-block__media"> <!-- image container that adds circle border radius --> <div class="image-frame image-frame--border-radius-full"> <!-- image object --> <img class="image-frame__image" src="img.png"/> </div> </div> <div class="media-block__content"> <!-- text object: user name --> <!-- text object: time ago --> <!-- text object: action completed by user --> </div> </div>
- 71. /* * Overall Rules */ .media-block { display: table; } /* * Local Descendants */ .media-block__content { display: table-cell; vertical-align: middle; } .media-block__media { display: table-cell; vertical-align: middle; padding-right: $content-spacing; } <div class="media-block"> <div class="media-block__media"> <!-- image container that adds circle border radius --> <div class="image-frame image-frame--border-radius-full"> <!-- image object --> <img class="image-frame__image" src="img.png"/> </div> </div> <div class="media-block__content"> <!-- text object: user name --> <!-- text object: time ago --> <!-- text object: action completed by user --> </div> </div>
- 72. /* * Overall Rules */ .media-block { display: table; } /* * Local Descendants */ .media-block__content { display: table-cell; vertical-align: middle; } .media-block__media { display: table-cell; vertical-align: middle; padding-right: $content-spacing; } <div class="media-block"> <div class="media-block__media"> <div class="image-frame image-frame--border-radius-full"> <img class="image-frame__image" src="img.png"/> </div> </div> <div class="media-block__content"> <!-- .heading is an text object component --> <!-- can be applied to text and non-text DOM elements --> <span class="heading heading--level-5">Brent...</span> <span class="heading heading--level-6">5 min ago</span> <h5 class="heading heading--level-5">Built...</h5> </div> </div>
- 73. /* * Overall Rules */ .media-block { display: table; } /* * Local Descendants */ .media-block__content { display: table-cell; vertical-align: middle; } .media-block__media { display: table-cell; vertical-align: middle; padding-right: $content-spacing; } <!-- End product: encapsulated, reusable block of markup --> <!-- Ready to drop into any view --> <div class="media-block"> <div class="media-block__media"> <div class="image-frame image-frame--border-radius-full"> <img class="image-frame__image" src="img.png"/> </div> </div> <div class="media-block__content"> <span class="heading heading--level-5">Brent...</span> <span class="heading heading--level-6">5 min ago</span> <h5 class="heading heading--level-5">Built...</h5> </div> </div>
- 74. But what about your JAVASCRIPT?
- 77. PHASE 1
- 78. New stylesheets and markup shipped behind feature flag PHASE 1
- 79. New stylesheets and markup shipped behind feature flag Training session on BEM syntax, OOCSS basics PHASE 1
- 80. PHASE 2
- 81. QA testing: feature turned on for select user groups PHASE 2
- 82. QA testing: feature turned on for select user groups Training session on rewriting existing markup PHASE 2
- 83. QA testing: feature turned on for select user groups Training session on rewriting existing markup Identify & assign views for “hands-on learning” rewrites PHASE 2
- 84. PHASE 3
- 85. Launch: feature 100% live PHASE 3
- 86. Launch: feature 100% live Ship style guide with full framework documentation PHASE 3
- 87. Launch: feature 100% live Ship style guide with full framework documentation Pair with teammates as needed on new feature builds PHASE 3
- 88. CHALLENGES
- 89. SCOPE CREEP
- 90. Originally prototyped for 3 user-facing views SCOPE CREEP
- 91. Originally prototyped for 3 user-facing views Grew to cover ALL user-facing views SCOPE CREEP
- 92. Originally prototyped for 3 user-facing views Grew to cover ALL user-facing views Packaged with JS refactor SCOPE CREEP
- 93. NEOPHOBES
- 94. Comfortable doing things the “old way” NEOPHOBES
- 95. Comfortable doing things the “old way” Wary of new system NEOPHOBES
- 96. OUTLIERS
- 97. New designs introduce “one-off” elements OUTLIERS
- 98. New designs introduce “one-off” elements Push back on design/product OUTLIERS
- 99. New designs introduce “one-off” elements Push back on design/product Justify introduction of stylistic inconsistencies OUTLIERS
- 100. RESULTS
- 101. UX GAINS
- 103. Faster pageloads More consistent, cohesive UI UX GAINS
- 104. DEVELOPMENT GAINS
- 106. Ship faster Fast, accurate prototyping DEVELOPMENT GAINS
- 107. Ship faster Fast, accurate prototyping Accessible, maintainable stylesheets DEVELOPMENT GAINS
- 108. PERFORMANCE GAINS
- 109. LEARN_V1 LEARN_V2 (OOCSS) NATIVE 213 stylesheets 31 stylesheets 1.3 MB 193 KB VENDOR 116 stylesheets 6 stylesheets 848 KB 49 KB TOTAL 329 stylesheets 37 stylesheets 2.1 MB 242 KB
- 110. LEARN_V1 LEARN_V2 (OOCSS) NATIVE 213 stylesheets 31 stylesheets 1.3 MB 193 KB VENDOR 116 stylesheets 6 stylesheets 848 KB 49 KB TOTAL 329 stylesheets 37 stylesheets 2.1 MB 242 KB
- 111. LEARN_V1 LEARN_V2 (OOCSS) TRACK#SHOW 262 ms 108 ms LESSON#SHOW 98 ms 48 ms PUBLIC_LESSON#SHOW 40 ms 21 ms
- 112. LEARN_V1 LEARN_V2 (OOCSS) TRACK#SHOW 262 ms 108 ms LESSON#SHOW 98 ms 48 ms PUBLIC_LESSON#SHOW 40 ms 21 ms
- 113. Kate Travers // kate@flatironschool.com // @kttravers // github: ktravers QUESTIONS?
- 114. Nicole Sullivan’s OOCSS https://github.com/stubbornella/oocss/wiki http://confreaks.tv/presenters/nicole-sullivan BEM Syntax https://css-tricks.com/bem-101/ https://en.bem.info/method/key-concepts/ RESOURCES