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https://webthemez.com/demo/sticky-multi-header-scroll/index.html
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#sticky .sticky-1, #sticky .sticky-2 { position: sticky; } #sticky .sticky-1 { top: 1em; z-index: 1; } #sticky .sticky-2 { top: 2em; z-index: 1; }
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<code class="html"><div id="container"> <article id="sticky"> <header> </header> <main> <h1 class="sticky-1">Sticky heading</h1 > <p>here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. Some copy goes here. </p> </main> <section> <h2 class="sticky-2">Both headings should stick at the same time.</h2 ></code>
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CSS?? ????? ??? ? ?? ??? ????. 1. HTML ? CSS? ?? ??? ?????? ???? ?? ???? ?? ???? ??????. 2. ?? ??? ??? ?? ???? ???? ?? ?? ??? ?? ?? ??? ??????. 3. ??? ????? ???? JavaScript? ?? ???? ?????? ??? ?????. ? ?? ??? ??? ??? ????? ?? ??, ??, ??? ? ?? ???? ?? ?? ?? ??? ???? ?????.

CSS ???? ??? ? ??? ??? ????? ???? ??? ???? ???? ?? ?? ???? ????? ???????. 1. Flexbox ? ??? ??? ?? ???? ??? ??, ?? : ??? ?? ? ????? ??? ????. 2. Caniuse ?? ?? ?? ??? ??????. 3. -webkit-, -moz-, -ms-, -o- ? ?? ???? ???? ???? ?????. 4. AutoPrefixer? ???? ???? ???? ???? ?? ????. 5. ?? ????? ????? PostCSS? ???? BrowsersList? ??????. 6. ?? ? ???? ???? ?????. 7. Modernizr ?? ??? ??? ????? ??? ? ????. 8. ?? ????? ???? ?? ? ??? ????.

themaindifferencesbetweendisplay : ???, ??, andinline-blockinhtml/cssarelayoutbehavior, spaceusage ? stylingcontrol.1.inlineElementsFlowWithText, do n'tStartonnewlines, ingorewidth/height, andonlyapplyhorizontalpadding/margins —IdealforIneTeTexting

CSS? ?? ?? ??? ??? ??? ???? ???? SVG? ???? ?? ???, ?? ????, ??? ?? ?? ??? ?? ???? ??????. ??? ??? ????. 1. ?, ??, ??? ?? ?? ??? ?? ??? ?????. 2. ?? ?? ? ??? ???? ??? ? ????. 3. ?????? ?? ?? ?? ?? ????? ???? ?? ??? ?? ? ? ????. 4. ???? ???? ??? ??? ??? ????? ?? ? ??? ????. ???? ???? ?? ?? ?? : ? (50pxatcenter) ? ??? ?? ?? : ??? (50%0%, 100 0%, 0%)? ?? ????. ????

??? ?? ???? ???? ??? ??, ?? ??? ??? ? ? ????? ??? ??? ???? ???? ? ? ?? ? ? ????. 1. CSS ?? : ?? ??? ???? ???? ?? ??; 2. ????? ?? ?? ?? ???? ?? ?? ??? ??? ? ????. 3. ?? ??? ??? ??? ??? ?? ?? ???? ????????. 4. ??? ????? ??? ???? ?? ? ??? ??? ?? ??? ?? ?? ??? ????? ???? ?? ????.

CSS? ???? ?? ? ???? ???? ??? ?? ??? ?? ?? ?? ? ? ????. 1. Max width : 100% ? ?? : Auto? ???? ???? ??? ????? ???? ??? ??? ? ??????. 2. HTML? SRCSET ? ?? ??? ???? ?? ??? ??? ??? ??? ???????????. 3. ?? ?? ? ?? ??? ???? ??? ??? ? ?? ?????? ??????. ? ??? ?? ???? ?? ???? ???? ???? ????????.

CSS ??? ??? ?? ?? ?? ? ?? ? ?? ??? ?? ????. 1.px? ?? ??? ????? ?? ??? ??? ?? ??? ?????. 2.EM? ?? ????, ?? ?? ??? ??? ?? ?? ???? ??, REM? ?? ??? ???? ? ????? ??? ????? ?????. 3.VW/VH? ?? ? ???? ??? ??? ??? ??????? ?? ???? ?????? ???????. 4. ??? ?? ?? ? ??, ?? ?? ?? ? ??? ???? ???? ???????. ???? ??? ???? ??? ? ?? ??? ???? ? ????.

?? ????? CSS ?? ??? ????? ?? ?? ??? ??, ?? ?? ?? ??, Flexbox ? ??? ???? ?? ?? ? ?? CSS ??? ????? ??? ???? ???? ?? ????? ??? ?????. 1. ?? ??? ??? ???? ????. ???? CSSRESET ?? NALLER.CSS? ???? ?? ???? ???? ????. 2. IE? ?? ??? ?? ?? ?? ??? ????. ?? ?? : ?? ? ???? ??? ??? ???? ?? ????. 3. Flexbox ? Grid? Edge Case ?? Old ???? ??? ?????. ? ?? ??? ? AutopRefixer ??; 4. ?? CSS ?? ??? ???? ????. Caniuse? ???? ?? ?????????.
