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培åºè§£èª¬: CSSã¢ã³ã«ãŒããžã·ã§ãã³ã°ãšãããŒã¢ã«ãŽãªãºã
CSSã¢ã³ã«ãŒããžã·ã§ãã³ã°ã¯ãèŠçŽ ãä»ã®èŠçŽ ïŒã¢ã³ã«ãŒãšåŒã°ããïŒã«å¯ŸããŠçžå¯Ÿçã«é 眮ã§ãã匷åãªæ°ããã¬ã€ã¢ãŠãæ©èœã§ããããã«ãããã³ã³ãã³ãã®å€æŽããã¥ãŒããŒãã®ãµã€ãºã«é©å¿ãããåçã§ã³ã³ããã¹ãã«å¿ãããŠãŒã¶ãŒã€ã³ã¿ãŒãã§ã€ã¹ãäœæã§ããŸãããã®æ©èœã广çã«å©çšããã«ã¯ãåºç€ãšãªããããŒã¢ã«ãŽãªãºã ãšäœçœ®èšç®ã®ã·ãŒã±ã³ã¹ãçè§£ããããšãéèŠã§ãã
CSSã¢ã³ã«ãŒããžã·ã§ãã³ã°ãšã¯ïŒ
CSS Anchored Positioning Module Level 1ã®ä»æ§ã§å®çŸ©ãããŠããããã«ãã¢ã³ã«ãŒããžã·ã§ãã³ã°ã¯2ã€ã®éèŠãªæŠå¿µã玹ä»ããŸãã
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- ã¢ã³ã«ãŒãããèŠçŽ : ãããã¯ãã¢ã³ã«ãŒèŠçŽ ã®äœçœ®ã«åºã¥ããŠé 眮ãããèŠçŽ ã§ãã
ãã®ã¢ãžã¥ãŒã«ã§ã¯ãæ°ããCSSããããã£ãå°å
¥ãããŠããŸããæã泚ç®ãã¹ãã¯ãposition: anchorãanchor-nameãããã³anchor()颿°ã§ããããã®ã¿ã€ãã®ã¬ã€ã¢ãŠãã容æã«ããŸãã
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- ã¢ã³ã«ãŒãããèŠçŽ ãšã¢ã³ã«ãŒèŠçŽ ã®åºæãµã€ãºã
- æå®ãããããŒãžã³ãããã£ã³ã°ããŸãã¯ããŒããŒã
- äž¡æ¹ã®èŠçŽ ã®å å«ãããã¯ã
- ããžã·ã§ãã³ã°ã«ãŒã«ãå®çŸ©ããæå®ããã
anchor()ã®å€ã
ãã®ã¢ã«ãŽãªãºã ãçè§£ããããšã¯ãã¬ã€ã¢ãŠããã©ã®ããã«åäœããããäºæž¬ããäºæããªãããžã·ã§ãã³ã°ã®åé¡ããããã°ããããã«äžå¯æ¬ ã§ãã
äœçœ®èšç®ã·ãŒã±ã³ã¹: ã¹ãããããšã®å èš³
äœçœ®èšç®ã·ãŒã±ã³ã¹ã«ã¯ããã€ãã®ã¹ããããå«ãŸãããããããåã®ã¹ãããã«åºã¥ããŠæ§ç¯ãããŸãããããåè§£ããŠã¿ãŸãããã
1. ã¢ã³ã«ãŒèŠçŽ ãšã¢ã³ã«ãŒãããèŠçŽ ã®èå¥
ããã»ã¹ã¯ãããããanchor-nameããããã£ãšposition: anchorããããã£ã«åºã¥ããŠãã¢ã³ã«ãŒèŠçŽ ãšã¢ã³ã«ãŒãããèŠçŽ ãèå¥ããããšããå§ãŸããŸãã äŸïŒ
/* Anchor Element */
.anchor {
anchor-name: --my-anchor;
/* Other styles */
}
/* Anchored Element */
.anchored {
position: anchor;
top: anchor(--my-anchor top);
left: anchor(--my-anchor left);
/* Other styles */
}
ãã®äŸã§ã¯ãã¯ã©ã¹.anchorãæã€èŠçŽ ã¯ã¢ã³ã«ãŒãšããŠæå®ãããã¯ã©ã¹.anchoredãæã€èŠçŽ ã¯ããã«å¯ŸããŠçžå¯Ÿçã«é
眮ãããŸãã
2. åæäœçœ®ã®æ±ºå®
æåã«ããã©ãŠã¶ã¯ã¢ã³ã«ãŒããžã·ã§ãã³ã°ãé©çšãããŠããªããã®ããã«ãã¢ã³ã«ãŒèŠçŽ ãšã¢ã³ã«ãŒãããèŠçŽ ã®äž¡æ¹ã®äœçœ®ãèšç®ããŸãã ããã¯ãããããéåžžã®ããã¥ã¡ã³ããããŒã«åŸã£ãŠé 眮ãããããšãæå³ããŸãã
ãã®åæããžã·ã§ãã³ã°ã¯ãã¢ã³ã«ãŒããžã·ã§ãã³ã°ã¢ã«ãŽãªãºã ã«ãããã®åŸã®èª¿æŽã®æºå段éãšãªããããéåžžã«éèŠã§ãã
3. anchor()颿°ã®é©çš
anchor()颿°ã¯ãã¢ã³ã«ãŒããžã·ã§ãã³ã°ã·ã¹ãã ã®äžå¿ã§ãã ããã¯ãã¢ã³ã«ãŒãããèŠçŽ ãã¢ã³ã«ãŒã«å¯ŸããŠã©ã®ããã«é
眮ããããæå®ããŸãã æ§æã¯äžè¬çã«æ¬¡ã®ãšããã§ãïŒproperty: anchor(anchor-name edge alignment fallback)ã
ããã€ãã®ã·ããªãªãæ€èšããŠã¿ãŸãããã
ã·ããªãª1: ç°¡åãªå·Šäžæã
.anchored {
position: anchor;
top: anchor(--my-anchor top);
left: anchor(--my-anchor left);
}
ããã«ãããã¢ã³ã«ãŒãããèŠçŽ ã®å·Šäžé ãã¢ã³ã«ãŒèŠçŽ ã®å·Šäžé ã«é 眮ãããŸãã ããã¯çŽæ¥çãªé 眮ã§ãã
ã·ããªãª2: ç°ãªããšããžã®äœ¿çš
.anchored {
position: anchor;
bottom: anchor(--my-anchor top);
right: anchor(--my-anchor left);
}
ããã§ã¯ãã¢ã³ã«ãŒãããèŠçŽ ã®*äžéš*ãã¢ã³ã«ãŒã®*äžéš*ãšæããããã¢ã³ã«ãŒãããèŠçŽ ã®*å³*ãã¢ã³ã«ãŒã®*å·Š*ãšæããããŸãã
ã·ããªãª3: ãªãã»ããã®è¿œå
.anchored {
position: anchor;
top: calc(anchor(--my-anchor bottom) + 10px);
left: calc(anchor(--my-anchor right) + 5px);
}
ããã«ãããã¢ã³ã«ãŒãããèŠçŽ ãã¢ã³ã«ãŒã®äžç«¯ãã10ãã¯ã»ã«äžãå³ç«¯ãã5ãã¯ã»ã«å³ã«é
眮ãããŸãã calc()颿°ã䜿çšãããšãã¢ã³ã«ãŒã®äœçœ®ã«åºã¥ããŠåçã«èª¿æŽã§ããŸãã
ã·ããªãª4: `fallback`å€ã®äœ¿çš
.anchored {
position: anchor;
top: anchor(--missing-anchor top, 20px);
left: anchor(--missing-anchor left, 50%);
}
ã¢ã³ã«ãŒ`--missing-anchor`ãèŠã€ãããªãå Žåãtopããããã£ã¯`20px`ã«èšå®ãããleftããããã£ã¯`50%`ã«èšå®ãããŸãã
4. ç«¶åãšå¶çŽã®è§£æ±º
ããè€éãªã¬ã€ã¢ãŠãã§ã¯ãè€æ°ã®ããžã·ã§ãã³ã°ã«ãŒã«ãçžäºäœçšããå Žåã«ç«¶åãçºçããå¯èœæ§ããããŸãã ãã©ãŠã¶ã¯ãå¶çŽè§£æ±ºã¡ã«ããºã ã䜿çšããŠãããã®ç«¶åã解決ããã¢ã³ã«ãŒãããèŠçŽ ã®æé©ãªäœçœ®ã決å®ããŸãã ããã«ã¯ãå€ãã®å Žåãç¹ç°æ§ãšå®çŸ©ãããé åºã«åºã¥ããŠã«ãŒã«ãåªå ããããšãå«ãŸããŸãã
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å«ãããã¯ã®ãšããžã«ãã£ãŠå¶çŽãããŠããå Žåããã©ãŠã¶ã¯ãæå®ãããanchor()ã®å€ãããããã«éžè±ããããšãæå³ããå Žåã§ãããã®å¢çå
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5. ã¬ã³ããªã³ã°ãšãªãããŒ
ã¢ã³ã«ãŒãããèŠçŽ ã®æçµçãªäœçœ®ãèšç®ããããšããã©ãŠã¶ã¯ããã«å¿ããŠã¬ã³ããªã³ã°ããŸãã ããã«ãããä»ã®èŠçŽ ã倿Žã«å¯Ÿå¿ããããã«åé 眮ããå¿ èŠããããããããã¥ã¡ã³ãã®ãªãããŒãããªã¬ãŒãããå¯èœæ§ããããŸãã
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topãleftãwidthãheightãªã©ã®ã¬ã€ã¢ãŠããããªã¬ãŒããããããã£ã®ä»£ããã«ãCSS倿ã䜿çšããŸãã- ã¹ã¿ã€ã«ã®æŽæ°ããããåŠçããŸãã
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ããŒã«ããã
ããŒã«ãããããããã説æããèŠçŽ ã«å¯ŸããŠçžå¯Ÿçã«é 眮ãããšãåžžã«è¡šç€ºãããã³ã³ããã¹ãã«é¢é£æ§ãããããšãä¿èšŒãããŸãã ããšãã°ãããŒã«ãããã¯ã䜿çšå¯èœãªã¹ããŒã¹ã«å¿ããŠããã¿ã³ã®äžãŸãã¯äžã«é 眮ã§ããŸãã
<button class="anchor" anchor-name="--tooltip-button">Hover Me</button>
<div class="tooltip">This is a tooltip!</div>
.tooltip {
position: anchor;
top: anchor(--tooltip-button bottom, 10px);
left: anchor(--tooltip-button left);
background-color: #f0f0f0;
border: 1px solid #ccc;
padding: 5px;
display: none; /* Initially hidden */
}
.anchor:hover + .tooltip {
display: block; /* Show on hover */
}
ã³ã³ããã¹ãã¡ãã¥ãŒ
ã³ã³ããã¹ãã¡ãã¥ãŒã¯ãå³ã¯ãªãã¯ãããèŠçŽ ã®æšªã«åçã«é 眮ã§ããŸãã ããã«ãããããçŽæçã§å¿çæ§ã®é«ããŠãŒã¶ãŒãšã¯ã¹ããªãšã³ã¹ãçãŸããŸãã ããšãã°ãã³ã³ããã¹ãã¡ãã¥ãŒã¯ãéžæããããã¹ãé åã®æšªã«è¡šç€ºãããã³ããŒã貌ãä»ãããŸãã¯ãã©ãŒããããªã©ã®ãªãã·ã§ã³ãæäŸããŸãã
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ãããŒãã£ã³ã°ã¢ã¯ã·ã§ã³ãã¿ã³ïŒFABïŒãåããã¢ãã€ã«ã¢ããªãæ³åããŠã¿ãŠãã ããã ã¢ã³ã«ãŒããžã·ã§ãã³ã°ã䜿çšãããšããŠãŒã¶ãŒãã¹ã¯ããŒã«ãŸãã¯ãºãŒã ããŠããFABããã¥ãŒããŒãã®ç¹å®ã®é ã«åºå®ããããç»é¢äžã®ä»ã®èŠçŽ ã«å¯ŸããŠçžå¯Ÿçã«åºå®ãããã§ããŸãã
äŸ: ã¢ãã€ã«ã¢ããªã®ããã ããã²ãŒã·ã§ã³ããŒã«å¯ŸããŠFABãé 眮ãã
.bottom-nav {
position: fixed;
bottom: 0;
left: 0;
width: 100%;
height: 60px;
background-color: #eee;
anchor-name: --bottom-nav;
}
.fab {
position: anchor;
bottom: calc(anchor(--bottom-nav top) - 20px); /* Positioned 20px above the top of the bottom nav */
right: 20px;
width: 56px;
height: 56px;
border-radius: 50%;
background-color: #2196F3;
color: white;
text-align: center;
line-height: 56px;
box-shadow: 0 2px 5px rgba(0,0,0,0.3);
}
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position: relativeãŸãã¯position: absoluteãæã€ç¥å èŠçŽ ã§ãããžã·ã§ãã³ã°ã³ã³ããã¹ãã«åœ±é¿ãäžããŠãããã®ã¯ãããŸããïŒ- ãã¥ãŒããŒãã®ãµã€ãºãŸãã¯ãºãŒã ã¬ãã«ãããžã·ã§ãã³ã°ã«åœ±é¿ãäžããŠããŸããïŒ
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