需要阴影在所有层级前面

问题描述 投票：0回答：2

我已经创建了可滚动项目列表。该列表的顶部有一个标题部分，并使用覆盖在列表顶部的方框阴影。当我向列表项添加突出显示悬停效果时，列表项突出显示位于框阴影的前面。有没有办法让盒子阴影始终显示在前面？

提供的示例：https://codepen.io/jwaugh3/pen/WNbopGX

```
<div class="gameList">
          <div class="gameListTitle">
            <h1>Title Block</h1>
            <h2>Box-Shadow Below</h2>
          </div>
        <div class="scroller">
          <div class="force-overflow">
          <div class="gameTile">
            <h class="gameTileText gameTimeGrid">*GameTime*</h>
            <h class="gameTileText tournamentNameGrid">*TournamentName, Year*</h>
            <h class="gameTileText teamOneGrid"><img src="../resources/Griffinlogo_square.png" class="teamIcon">*TeamName*</h>
            <h class="gameTileText teamOneScoreGrid">*SeriesScore*</h>
            <h class="gameTileText teamTwoGrid"><img src="../resources/IG.jpg" class="teamIcon">*TeamName*</h>
            <h class="gameTileText teamTwoScoreGrid">*SeriesScore*</h>
          </div>
          <div class="gameTileSpacer"></div>
    </div>
</div>
```


.gameList {
  grid-column-start: 1;
  grid-column-end: 2;
  grid-row-start: 2;
  grid-row-end: 4;
  background-color: #6B6B6B;
  border-radius: 10px;
}

.gameListTitle {
  z-index: 1;
  border-radius: 10px 10px 0px 0px;
  background-color: #6B6B6B;
  color: white;
  padding: 10px;
  box-shadow: 0px 10px 6px -1px rgba(0,0,0,0.58);
}

.scroller {
  overflow-y: scroll;
  height: 85%;
  margin-right: 2px;
  width: 100%;
}

::-webkit-scrollbar {
  margin-top: 10px;
    width: 12px;
    background-color: rgb(0,0,0,0);
}

::-webkit-scrollbar-track {
  margin-top: 10px;
  margin-bottom: 10px;
  background-color: rgb(0,0,0,0);
  box-shadow: inset 0 0 6px rgba(0,0,0,0.3);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb {
  margin-top: 10px;
  margin-bottom: 10px;
  background: white;
  box-shadow: inset 0 0 6px rgba(0,0,0,.3);
  border-radius: 10px;
}

.force-overflow {
  margin-right: 3px; /*margin added to right of list for scrollbar overlap*/
}

.gameTile {
  padding: 10px;
  display: grid;
  grid-template-rows: 1fr 1fr 1fr;
  grid-template-columns: 1fr 1fr;
}

.gameTile:hover {
  background-color: #A0A0A0;
  z-index: 1;
}

.gameTileText {
  font-size: 1rem;
  font-weight: bold;
  color: white;
  padding: 3px;
  vertical-align: middle;
}

.teamIcon {
  max-width: 25px;
}

.gameTimeGrid {
  grid-row-start: 1;
  grid-row-end: 2;
  grid-column-start: 1;
  grid-column-end: 2;
}

.tournamentNameGrid {
  grid-row-start: 1;
  grid-row-end: 2;
  grid-column-start: 2;
  grid-column-end: 3;
}

.teamOneGrid {
  grid-row-start: 2;
  grid-row-end: 3;
  grid-column-start: 1;
  grid-column-end: 2;
}

.teamOneScoreGrid {
  grid-row-start: 2;
  grid-row-end: 3;
  grid-column-start: 2;
  grid-column-end: 3;
  text-align: center;
}

.teamTwoGrid {
  grid-row-start: 3;
  grid-row-end: 4;
  grid-column-start: 1;
  grid-column-end: 2;
}

.teamTwoScoreGrid {
  grid-row-start: 3;
  grid-row-end: 4;
  grid-column-start: 2;
  grid-column-end: 3;
  text-align: center;
}

.gameTileSpacer {
  width: 100%;
  height: 3px;
  background-color: #2D2D2D;
}
```
html css box-shadow
2个回答
0
投票

所以要在第一个列表项上重叠阴影？

您可以像这样将插入阴影添加到第一个列表项悬停中：

.gameTile:first-child:hover {
  background-color: #A0A0A0;
  z-index: 1;
  box-shadow: inset 0px 10px 6px -1px rgba(0,0,0,0.58);
}
0
投票

这里的问题是由未处理的堆栈上下文引起的。

您希望一个元素位于另一个元素上方，您需要创建一个堆叠上下文How To

默认情况下，将在其之后的元素是之前的元素

div {
  height: 100px;
  width: 150px;
  color: white;
}

.before {
  background: red;
  z-index: 99999;
}

.after {
  background: orange;
  margin-top: -30px;
  margin-left: 80px;
  z-index: 5;
}
<div class="before">before: z-index:99999; still cant go above</div>
<div class="after">after : z-index:5; still cant go below</div>

无论您应用什么z-index，都不会发生任何变化，因为没有堆栈上下文。

现在我们已经涵盖了基础知识，让我们回到您的问题，您所需要的只是一个堆栈上下文，然后使用z-index进行更改（首先出现。）>

幸运的是，您正在使用CSS Grid，只需添加display:grid，它似乎缺少.gameList

注意：

请记住，堆栈上下文仅影响直接子级

现在由于有了CSS网格，我们有了堆栈上下文，我们需要给.gameListTitle一个比.scroller高的z索引，因为它紧随其后]

.gameList {
  grid-column-start: 1;
  grid-column-end: 2;
  grid-row-start: 2;
  grid-row-end: 4;
  background-color: #6B6B6B;
  border-radius: 10px;
  
  display: grid /* Added */
}

/* z-index :1 */
.gameListTitle {
  z-index: 1;
  border-radius: 10px 10px 0px 0px;
  background-color: #6B6B6B;
  color: white;
  padding: 10px;
  box-shadow: 0px 10px 6px -1px rgba(0, 0, 0, 0.58);
}

/* no z-index which lower than 0*/
.scroller {
  overflow-y: scroll;
  height: 85%;
  margin-right: 2px;
  width: 100%;
}

::-webkit-scrollbar {
  margin-top: 10px;
  width: 12px;
  background-color: rgb(0, 0, 0, 0);
}

::-webkit-scrollbar-track {
  margin-top: 10px;
  margin-bottom: 10px;
  background-color: rgb(0, 0, 0, 0);
  box-shadow: inset 0 0 6px rgba(0, 0, 0, 0.3);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb {
  margin-top: 10px;
  margin-bottom: 10px;
  background: white;
  box-shadow: inset 0 0 6px rgba(0, 0, 0, .3);
  border-radius: 10px;
}

.force-overflow {
  margin-right: 3px;
  /*margin added to right of list for scrollbar overlap*/
}

.gameTile {
  padding: 10px;
  display: grid;
  grid-template-rows: 1fr 1fr 1fr;
  grid-template-columns: 1fr 1fr;
}

.gameTile:hover {
  background-color: #A0A0A0;
  z-index: 1;
}

.gameTileText {
  font-size: 1rem;
  font-weight: bold;
  color: white;
  padding: 3px;
  vertical-align: middle;
}

.teamIcon {
  max-width: 25px;
}

.gameTimeGrid {
  grid-row-start: 1;
  grid-row-end: 2;
  grid-column-start: 1;
  grid-column-end: 2;
}

.tournamentNameGrid {
  grid-row-start: 1;
  grid-row-end: 2;
  grid-column-start: 2;
  grid-column-end: 3;
}

.teamOneGrid {
  grid-row-start: 2;
  grid-row-end: 3;
  grid-column-start: 1;
  grid-column-end: 2;
}

.teamOneScoreGrid {
  grid-row-start: 2;
  grid-row-end: 3;
  grid-column-start: 2;
  grid-column-end: 3;
  text-align: center;
}

.teamTwoGrid {
  grid-row-start: 3;
  grid-row-end: 4;
  grid-column-start: 1;
  grid-column-end: 2;
}

.teamTwoScoreGrid {
  grid-row-start: 3;
  grid-row-end: 4;
  grid-column-start: 2;
  grid-column-end: 3;
  text-align: center;
}

.gameTileSpacer {
  width: 100%;
  height: 3px;
  background-color: #2D2D2D;
}
<div class="gameList">
  <div class="gameListTitle">
    <h1>Title Block</h1>
    <h2>Box-Shadow Below</h2>
  </div>
  <div class="scroller">
    <div class="force-overflow">
      <div class="gameTile">
        <h class="gameTileText gameTimeGrid">*GameTime*</h>
        <h class="gameTileText tournamentNameGrid">*TournamentName, Year*</h>
        <h class="gameTileText teamOneGrid"><img src="../resources/Griffinlogo_square.png" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamOneScoreGrid">*SeriesScore*</h>
        <h class="gameTileText teamTwoGrid"><img src="../resources/IG.jpg" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamTwoScoreGrid">*SeriesScore*</h>
      </div>
      <div class="gameTileSpacer"></div>

      <div class="gameTile">
        <h class="gameTileText gameTimeGrid">*GameTime*</h>
        <h class="gameTileText tournamentNameGrid">*TournamentName, Year*</h>
        <h class="gameTileText teamOneGrid"><img src="../resources/Griffinlogo_square.png" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamOneScoreGrid">*SeriesScore*</h>
        <h class="gameTileText teamTwoGrid"><img src="../resources/IG.jpg" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamTwoScoreGrid">*SeriesScore*</h>
      </div>
      <div class="gameTileSpacer"></div>

      <div class="gameTile">
        <h class="gameTileText gameTimeGrid">*GameTime*</h>
        <h class="gameTileText tournamentNameGrid">*TournamentName, Year*</h>
        <h class="gameTileText teamOneGrid"><img src="../resources/Griffinlogo_square.png" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamOneScoreGrid">*SeriesScore*</h>
        <h class="gameTileText teamTwoGrid"><img src="../resources/IG.jpg" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamTwoScoreGrid">*SeriesScore*</h>
      </div>
      <div class="gameTileSpacer"></div>

      <div class="gameTile">
        <h class="gameTileText gameTimeGrid">*GameTime*</h>
        <h class="gameTileText tournamentNameGrid">*TournamentName, Year*</h>
        <h class="gameTileText teamOneGrid"><img src="../resources/Griffinlogo_square.png" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamOneScoreGrid">*SeriesScore*</h>
        <h class="gameTileText teamTwoGrid"><img src="../resources/IG.jpg" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamTwoScoreGrid">*SeriesScore*</h>
      </div>
      <div class="gameTileSpacer"></div>

      <div class="gameTile">
        <h class="gameTileText gameTimeGrid">*GameTime*</h>
        <h class="gameTileText tournamentNameGrid">*TournamentName, Year*</h>
        <h class="gameTileText teamOneGrid"><img src="../resources/Griffinlogo_square.png" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamOneScoreGrid">*SeriesScore*</h>
        <h class="gameTileText teamTwoGrid"><img src="../resources/IG.jpg" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamTwoScoreGrid">*SeriesScore*</h>
      </div>
      <div class="gameTileSpacer"></div>

      <div class="gameTile">
        <h class="gameTileText gameTimeGrid">*GameTime*</h>
        <h class="gameTileText tournamentNameGrid">*TournamentName, Year*</h>
        <h class="gameTileText teamOneGrid"><img src="../resources/Griffinlogo_square.png" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamOneScoreGrid">*SeriesScore*</h>
        <h class="gameTileText teamTwoGrid"><img src="../resources/IG.jpg" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamTwoScoreGrid">*SeriesScore*</h>
      </div>
      <div class="gameTileSpacer"></div>

      <div class="gameTile">
        <h class="gameTileText gameTimeGrid">*GameTime*</h>
        <h class="gameTileText tournamentNameGrid">*TournamentName, Year*</h>
        <h class="gameTileText teamOneGrid"><img src="../resources/Griffinlogo_square.png" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamOneScoreGrid">*SeriesScore*</h>
        <h class="gameTileText teamTwoGrid"><img src="../resources/IG.jpg" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamTwoScoreGrid">*SeriesScore*</h>
      </div>
      <div class="gameTileSpacer"></div>

      <div class="gameTile">
        <h class="gameTileText gameTimeGrid">*GameTime*</h>
        <h class="gameTileText tournamentNameGrid">*TournamentName, Year*</h>
        <h class="gameTileText teamOneGrid"><img src="../resources/Griffinlogo_square.png" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamOneScoreGrid">*SeriesScore*</h>
        <h class="gameTileText teamTwoGrid"><img src="../resources/IG.jpg" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamTwoScoreGrid">*SeriesScore*</h>
      </div>
      <div class="gameTileSpacer"></div>

      <div class="gameTile">
        <h class="gameTileText gameTimeGrid">*GameTime*</h>
        <h class="gameTileText tournamentNameGrid">*TournamentName, Year*</h>
        <h class="gameTileText teamOneGrid"><img src="../resources/Griffinlogo_square.png" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamOneScoreGrid">*SeriesScore*</h>
        <h class="gameTileText teamTwoGrid"><img src="../resources/IG.jpg" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamTwoScoreGrid">*SeriesScore*</h>
      </div>
      <div class="gameTileSpacer"></div>

      <div class="gameTile">
        <h class="gameTileText gameTimeGrid">*GameTime*</h>
        <h class="gameTileText tournamentNameGrid">*TournamentName, Year*</h>
        <h class="gameTileText teamOneGrid"><img src="../resources/Griffinlogo_square.png" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamOneScoreGrid">*SeriesScore*</h>
        <h class="gameTileText teamTwoGrid"><img src="../resources/IG.jpg" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamTwoScoreGrid">*SeriesScore*</h>
      </div>
      <div class="gameTileSpacer"></div>

      <div class="gameTile">
        <h class="gameTileText gameTimeGrid">*GameTime*</h>
        <h class="gameTileText tournamentNameGrid">*TournamentName, Year*</h>
        <h class="gameTileText teamOneGrid"><img src="../resources/Griffinlogo_square.png" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamOneScoreGrid">*SeriesScore*</h>
        <h class="gameTileText teamTwoGrid"><img src="../resources/IG.jpg" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamTwoScoreGrid">*SeriesScore*</h>
      </div>
      <div class="gameTileSpacer"></div>

      <div class="gameTile">
        <h class="gameTileText gameTimeGrid">*GameTime*</h>
        <h class="gameTileText tournamentNameGrid">*TournamentName, Year*</h>
        <h class="gameTileText teamOneGrid"><img src="../resources/Griffinlogo_square.png" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamOneScoreGrid">*SeriesScore*</h>
        <h class="gameTileText teamTwoGrid"><img src="../resources/IG.jpg" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamTwoScoreGrid">*SeriesScore*</h>
      </div>
      <div class="gameTileSpacer"></div>

      <div class="gameTile">
        <h class="gameTileText gameTimeGrid">*GameTime*</h>
        <h class="gameTileText tournamentNameGrid">*TournamentName, Year*</h>
        <h class="gameTileText teamOneGrid"><img src="../resources/Griffinlogo_square.png" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamOneScoreGrid">*SeriesScore*</h>
        <h class="gameTileText teamTwoGrid"><img src="../resources/IG.jpg" class="teamIcon">*TeamName*</h>
        <h class="gameTileText teamTwoScoreGrid">*SeriesScore*</h>
      </div>
      <div class="gameTileSpacer"></div>

    </div>
  </div>
</div>
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