1.hover
移入其父元素.navI時(shí)，觸發(fā)鼠標(biāo)的hover態(tài)，給父元素添加樣式為position:relative;z-index:1;。從而提升了層級(jí)z-index。在其子元素導(dǎo)航內(nèi)容的層級(jí)比拼中，“子憑父貴”，父元素層級(jí)高的，其導(dǎo)航內(nèi)容在重疊狀態(tài)中顯示在最上面
| <style>body,p{margin: 0;}h2{margin: 0;font-size:100%;}ul{margin: 0;padding: 0;list-style: none;} a{text-decoration: none;color:inherit;}.box{width: 572px;border: 1px solid #999;overflow: hidden;}.nav{margin-left: -1px;font: 14px "微軟雅黑";overflow: hidden;background-color: #f1f1f1;}.navI{float: left;width: 33.333%;box-sizing: border-box;}.navI-tit{line-height: 40px;text-align: center;cursor: pointer;border-left: 1px solid #cecece;border-bottom: 1px solid #cecece;}.navI-txt{width: 572px;height:200px;text-indent:2em;line-height: 2;background:#fff;}.ml1{margin-left: -100%;}.ml2{margin-left: -200%;}.navI_active{position:relative;z-index:1;}/*重點(diǎn)代碼*/.navI:hover{position:relative;z-index:1;}.navI:hover .navI-tit{background:#fff;border-bottom:none;}</style><div class="box"> <ul class="nav"> <li class="navI navI_active"> <h2 class="navI-tit">課程</h2> <p class="navI-txt">課程內(nèi)容</p> </li> <li class="navI"> <h2 class="navI-tit">學(xué)習(xí)計(jì)劃</h2> <p class="navI-txt ml1">學(xué)習(xí)計(jì)劃內(nèi)容</p> </li> <li class="navI"> <h2 class="navI-tit">技能圖譜</h2> <p class="navI-txt ml2">技能圖譜內(nèi)容</p> </li> </ul> </div> |
2.錨點(diǎn)
點(diǎn)擊導(dǎo)航標(biāo)題時(shí)，觸發(fā)target偽類，改變對(duì)應(yīng)的導(dǎo)航內(nèi)容的層級(jí)z-index，從而使當(dāng)前導(dǎo)航內(nèi)容在三個(gè)導(dǎo)航內(nèi)容中勝出，在最上層顯示；與此同時(shí)，改變當(dāng)前導(dǎo)航標(biāo)題的樣式
| <style>body,p{margin: 0;}h2{margin: 0;font-size:100%;}ul{margin: 0;padding: 0;list-style: none;} a{text-decoration: none;color:inherit;}.box{width: 572px;border: 1px solid #999;overflow: hidden;}.nav{margin-left: -1px;font: 14px "微軟雅黑";overflow: hidden;background-color: #f1f1f1;}.navI{float: left;width: 33.333%;box-sizing: border-box;position:relative;}.navI-tit{position:absolute;top:0;left:0;right:0;box-sizing: border-box;line-height: 40px;height: 40px;text-align: center;cursor: pointer;border-left: 1px solid #cecece;border-bottom: 1px solid #cecece;}.navI-txt{width: 572px;height:200px;margin-top: 40px;text-indent:2em;line-height: 2;background:#fff;}.ml1{margin-left: -100%;}.ml2{margin-left: -200%;}.navI_active{z-index:1;}/*重點(diǎn)代碼*/.navI-txt:target{position:relative;z-index:1;}.navI-txt:target ~ .navI-tit{background:#fff;border-bottom:none;}</style><div class="box"> <ul class="nav"> <li class="navI navI_active"> <p class="navI-txt" id="kc">課程內(nèi)容</p> <a class="navI-tit" href="#kc">課程</a> </li> <li class="navI"> <p class="navI-txt ml1" id="xx">學(xué)習(xí)計(jì)劃內(nèi)容</p> <a class="navI-tit" href="#xx">學(xué)習(xí)計(jì)劃</a> </li> <li class="navI"> <p class="navI-txt ml2" id="jn">技能圖譜內(nèi)容</p> <a class="navI-tit" href="#jn">技能圖譜</a> </li> </ul> </div> |
