All you need is CSS

1. All you need is CSS Radoslav Stankov
2. !
3. Radoslav Stankov @rstankov rstankov.com
4. https://tips.rstankov.com
5. Best JavaScript Is No JavaScript
6. "
7. I ❤
8. I ❤
9. I ❤
12. SIMPLIFYING PROPERTY MANAGEMENT FOR MODERN COMMUNITIES LIVO.ME
14. $ Side project
16. % LIVO Architecture & Ruby on Rails ' No JavaScript ( No custom CSS, use Tailwind ) Extensive e2e tests * Focus on domain
17. ... and for mobile apps used by inhabitants
18. +
19. % LIVO Architecture & Ruby on Rails ' No JavaScript ( No custom CSS, use Tailwind ) Extensive e2e tests * Focus on domain
21. , How to avoid writing code checklist - reduce scope, by adjusting business requirement . use build-in feature of the browser / use feature from core platform - Next / React / Angular ... 0 use type system 1 move to logic backend 2 (only when I really have to) use 3rd party library (browser edition)
22. , How to avoid writing code checklist - reduce scope, by adjusting business requirement . use build-in feature of the browser / use feature from core platform - Next / React / Angular ... 0 use type system 1 move to logic backend 2 (only when I really have to) use 3rd party library (browser edition)
23. HTML CSS JavaScript
24. Plain HTML/CSS Plain HTML/CSS Everything with JS
26. :hover
28. function MyButton() { const [isHovered, setIsHovered] = useState(false); const className = isHovered ? 'button button-hover' : 'button'; const onMouseEnter = () => setIsHovered(true); const onMouseLeave = () => setIsHovered(false); return ( <button className={className} onMouseEnter={onMouseEnter} onMouseLeave={onMouseLeave}>Button</button> ); }
30. css grid
36. .grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr)); }
37. <details>
39. <details> <summary>System Requirements</summary> <p> Requires a computer running an operating system. The computer must have some memory and ideally some kind of long-term storage. An input device as well as some form of output device is recommended. </p> </details>
44. <details>
 <summary> <svg class="open-hidden">...</svg> <svg class="open-visible">...</svg> </summary>
 <ul> <li><a>...</a></li> <li><a>...</a></li> ... </ul>
 </details>
45. <details>
 <summary> <svg class="open-hidden">...</svg> <svg class="open-visible">...</svg> </summary>
 <ul> <li><a>...</a></li> <li><a>...</a></li> ... </ul>
 </details>
46. details[open] .open-hidden { display: none; } details:not([open]) .open-visible { display: none; }
47. Responsive Table
52. @media (max-width: 640px) { .table-component, .table-component thead, .table-component tbody, .table-component tfoot, .table-component tr { display: block; } .table-component tbody td { display: flex; } .table-component tbody td:not(.actions):before { content: attr(title); flex: 0 1 35%; display: block; white-space: nowrap; } }
53. @media (max-width: 640px) { .table-component, .table-component thead, .table-component tbody, .table-component tfoot, .table-component tr { display: block; } .table-component tbody td { display: flex; } .table-component tbody td:not(.actions):before { content: attr(title); flex: 0 1 35%; display: block; white-space: nowrap; } }
54. @media (max-width: 640px) { .table-component, .table-component thead, .table-component tbody, .table-component tfoot, .table-component tr { display: block; } .table-component tbody td { display: flex; } .table-component tbody td:not(.actions):before { content: attr(title); flex: 0 1 35%; display: block; white-space: nowrap; } }
55. @media (max-width: 640px) { .table-component, .table-component thead, .table-component tbody, .table-component tfoot, .table-component tr { display: block; } .table-component tbody td { display: flex; } .table-component tbody td:not(.actions):before { content: attr(title); flex: 0 1 35%; display: block; white-space: nowrap; } }
56. <input type="date">
60. 3 Accessible 4 Mobile friendly 5 All batteries include ➡ No extra code 7 Single date, no range 7 Style doesn't match our site <input type="date">
61. <dialog>
65. 3 Accessible 4 Build-in backdrop 5 Auto handling of forms (example: auto-focus) 8 Stops scrolling of back page 9 Auto handle of ESC : Style as you wish 7 JavaScript to trigger the modal version 7 JavaScript need to close dialog when click backdrop <dialog>
66. import { setEventListners } from './utils'; setEventListners(document, { '[data-dialog]:click': (e) => { document .getElementById(e.target.closest('[data-dialog]').dataset.dialog) ?.showModal(); }, 'dialog:click': (e) => { if (e.target.tagName === 'DIALOG') { e.target.close(); } }, });
67. <span title="tooltip">
72. https://chatgpt.com/share/2d4606ad-c764-4db8-9ed5-158e90e8e391
73. /* Tooltip base styles for any element with a title attribute */ [title] { position: relative; cursor: pointer; display: inline-block; } /* Hidden before hover */ [title]::before, [title]::after { visibility: hidden; opacity: 0; pointer-events: none; } /* Tooltip text styling */ [title]::after { content: attr(title); position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%) translateY(-5px); white-space: nowrap; z-index: 10; padding: 8px; border-radius: 4px; background-color: black; color: white; text-align: center; font-size: 14px; line-height: 1.2; transition: opacity 0.3s, visibility 0.3s; } /* Tooltip arrow */ [title]::before { content: ''; position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%) translateY(5px); border-width: 5px; border-style: solid; border-color: black transparent transparent transparent; transition: opacity 0.3s, visibility 0.3s; } /* Show tooltip on hover */ [title]:hover::before, [title]:hover::after { visibility: visible; opacity: 1; }
74. /* Tooltip base styles for any element with a title attribute */ [title] { position: relative; cursor: pointer; display: inline-block; } /* Hidden before hover */ [title]::before, [title]::after { visibility: hidden; opacity: 0; pointer-events: none; } /* Tooltip text styling */ [title]::after { content: attr(title); position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%) translateY(-5px); white-space: nowrap; z-index: 10; padding: 8px; border-radius: 4px; background-color: black; color: white; text-align: center; font-size: 14px; line-height: 1.2; transition: opacity 0.3s, visibility 0.3s; } /* Tooltip arrow */ [title]::before { content: ''; position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%) translateY(5px); border-width: 5px; border-style: solid; border-color: black transparent transparent transparent; transition: opacity 0.3s, visibility 0.3s; } /* Show tooltip on hover */ [title]:hover::before, [title]:hover::after { visibility: visible; opacity: 1; } ... and the code fits on a slide "
76. /* Tooltip base styles for any element with a title attribute */ [title] { position: relative; cursor: pointer; display: inline-block; } /* Hidden before hover */ [title]::before, [title]::after { visibility: hidden; opacity: 0; pointer-events: none; } /* Tooltip text styling */ [title]::after { content: attr(title); position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%) translateY(-5px); white-space: nowrap; z-index: 10; padding: 8px; border-radius: 4px; background-color: black; color: white; text-align: center; font-size: 14px; line-height: 1.2; transition: opacity 0.3s, visibility 0.3s; } /* Tooltip arrow */ [title]::before { content: ''; position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%) translateY(5px); border-width: 5px; border-style: solid; border-color: black transparent transparent transparent; transition: opacity 0.3s, visibility 0.3s; } /* Show tooltip on hover */ [title]:hover::before, [title]:hover::after { visibility: visible; opacity: 1; }
77. /* Tooltip base styles for any element with a title attribute */ [title] { position: relative; cursor: pointer; display: inline-block; } /* Hidden before hover */ [title]::before, [title]::after { visibility: hidden; opacity: 0; pointer-events: none; } /* Tooltip text styling */ [title]::after { content: attr(title); position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%) translateY(-5px);
78. /* Tooltip base styles for any element with a title attribute */ [title] { position: relative; cursor: pointer; display: inline-block; } /* Hidden before hover */ [title]::before, [title]::after { visibility: hidden; opacity: 0; pointer-events: none; } /* Tooltip text styling */ [title]::after { content: attr(title); position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%) translateY(-5px); white-space: nowrap;
79. pointer-events: none; } /* Tooltip text styling */ [title]::after { content: attr(title); position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%) translateY(-5px); white-space: nowrap; z-index: 10; padding: 8px; border-radius: 4px; background-color: black; color: white; text-align: center; font-size: 14px; line-height: 1.2; transition: opacity 0.3s, visibility 0.3s; } /* Tooltip arrow */ [title]::before {
80. line-height: 1.2; transition: opacity 0.3s, visibility 0.3s; } /* Tooltip arrow */ [title]::before { content: ''; position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%) translateY(5px); border-width: 5px; border-style: solid; border-color: black transparent transparent transparent; transition: opacity 0.3s, visibility 0.3s; } /* Show tooltip on hover */ [title]:hover::before, [title]:hover::after { visibility: visible; opacity: 1; }
82. https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_container_queries
89. https://codepen.io/web-dot-dev/pen/gbOKyRZ <select> <button> <div> <selectedcontent> <div class="custom-option"> <span class="indicator success"></span> <span class="option-text">On</span> </div> </selectedcontent> <svg width="24" height="24" viewBox="0 0 24 24"> <path fill="currentColor" d="m7 10l5 5l5-5z"></path> </svg> </div> </button> <div> <option value="on"> <div class="custom-option"> <span class="indicator success"></span> <span class="option-text">On</span> </div> </option> <option value="off"> <div class="custom-option"> <span class="indicator danger"></span> <span class="option-text">Off</span> </div> </option> </div> </select>
94. ... in 2025/2026 ;
96. https://rstankov.com/appearances