最简单的方法是在包含元素上设置position: relative，在容器内的工具提示元素上设置position: absolute，使其相对于父元素(包含元素)浮动。例如:

<div style="background: yellow;">
    <div style="display: inline-block; position: relative; background: pink;">
        <label>Name</label>
        <input type="text" />

        <div style="background: #e5e5e5; position: absolute; top: -10px; left: 0; right: 0;">
            Tooltip text
        </div>
    </div>
</div>

您可以使用数据属性，伪元素和内容创建自定义CSS工具提示:attr()等。

http://jsfiddle.net/clintioo/gLeydk0k/11/

<div data-tooltip="This is my tooltip">
    <label>Name</label>
    <input type="text" />
</div>

.

div:hover:before {
    content: attr(data-tooltip);
    position: absolute;
    padding: 5px 10px;
    margin: -3px 0 0 180px;
    background: orange;
    color: white;
    border-radius: 3px;
}

div:hover:after {
    content: '';
    position: absolute;
    margin: 6px 0 0 3px;
    width: 0;
    height: 0;
    border-top: 5px solid transparent;
    border-right: 10px solid orange;
    border-bottom: 5px solid transparent;
}

input[type="text"] {
    width: 125px;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

我开发了三种类型的褪色效果:

/* setup tooltips */ .tooltip { position: relative; } .tooltip:before, .tooltip:after { display: block; opacity: 0; pointer-events: none; position: absolute; } .tooltip:after { border-right: 6px solid transparent; border-bottom: 6px solid rgba(0,0,0,.75); border-left: 6px solid transparent; content: ''; height: 0; top: 20px; left: 20px; width: 0; } .tooltip:before { background: rgba(0,0,0,.75); border-radius: 2px; color: #fff; content: attr(data-title); font-size: 14px; padding: 6px 10px; top: 26px; white-space: nowrap; } /* the animations */ /* fade */ .tooltip.fade:after, .tooltip.fade:before { transform: translate3d(0,-10px,0); transition: all .15s ease-in-out; } .tooltip.fade:hover:after, .tooltip.fade:hover:before { opacity: 1; transform: translate3d(0,0,0); } /* expand */ .tooltip.expand:before { transform: scale3d(.2,.2,1); transition: all .2s ease-in-out; } .tooltip.expand:after { transform: translate3d(0,6px,0); transition: all .1s ease-in-out; } .tooltip.expand:hover:before, .tooltip.expand:hover:after { opacity: 1; transform: scale3d(1,1,1); } .tooltip.expand:hover:after { transition: all .2s .1s ease-in-out; } /* swing */ .tooltip.swing:before, .tooltip.swing:after { transform: translate3d(0,30px,0) rotate3d(0,0,1,60deg); transform-origin: 0 0; transition: transform .15s ease-in-out, opacity .2s; } .tooltip.swing:after { transform: translate3d(0,60px,0); transition: transform .15s ease-in-out, opacity .2s; } .tooltip.swing:hover:before, .tooltip.swing:hover:after { opacity: 1; transform: translate3d(0,0,0) rotate3d(1,1,1,0deg); } /* basic styling: has nothing to do with tooltips: */ h1 { padding-left: 50px; } ul { margin-bottom: 40px; } li { cursor: pointer; display: inline-block; padding: 0 10px; } <h1>FADE</h1> <div class="tooltip fade" data-title="Hypertext Markup Language"> <label>Name</label> <input type="text"/> </div> <h1>EXPAND</h1> <div class="tooltip expand" data-title="Hypertext Markup Language"> <label>Name</label> <input type="text"/> </div> <h1>SWING</h1> <div class="tooltip swing" data-title="Hypertext Markup Language"> <label>Name</label> <input type="text"/> </div>

你可以使用纯CSS制作工具提示。试试这个。希望能帮助你解决你的问题。

HTML

<div class="tooltip"> Name
    <span class="tooltiptext">Add your tooltip text here.</span>
</div>

CSS

.tooltip {
        position: relative;
        display: inline-block;
        cursor: pointer;
    }

    .tooltip .tooltiptext {
        visibility: hidden;
        width: 270px;
        background-color: #555;
        color: #fff;
        text-align: center;
        border-radius: 6px;
        padding: 5px 0;
        position: absolute;
        z-index: 1;
        bottom: 125%;
        left: 50%;
        margin-left: -60px;
        opacity: 0;
        transition: opacity 1s;
    }

    .tooltip .tooltiptext::after {
        content: "";
        position: absolute;
        top: 100%;
        left: 50%;
        margin-left: -5px;
        border-width: 5px;
        border-style: solid;
        border-color: #555 transparent transparent transparent;
    }

    .tooltip:hover .tooltiptext {
        visibility: visible;
        opacity: 1;
    }

这个问题有很多答案，但它仍然可能会帮助到一些人。它适用于所有左、右、上、下位置。

下面是css:

    .m-tb-5 {
        margin-top: 2px;
        margin-bottom: 2px;
    }
    [data-tooltip] {
        display: inline-block;
        position: relative;
        cursor: help;
        padding: 3px;
    }
    /* Tooltip styling */
    [data-tooltip]:before {
        content: attr(data-tooltip);
        display: none;
        position: absolute;
        background: #000;
        color: #fff;
        padding: 3px 6px;
        font-size: 10px;
        line-height: 1.4;
        min-width: 100px;
        text-align: center;
        border-radius: 4px;
    }
    /* Dynamic horizontal centering */
    [data-tooltip-position="top"]:before,
    [data-tooltip-position="bottom"]:before {
        left: 50%;
        -ms-transform: translateX(-50%);
        -moz-transform: translateX(-50%);
        -webkit-transform: translateX(-50%);
        transform: translateX(-50%);
    }
    /* Dynamic vertical centering */
    [data-tooltip-position="right"]:before,
    [data-tooltip-position="left"]:before {
        top: 50%;
        -ms-transform: translateY(-50%);
        -moz-transform: translateY(-50%);
        -webkit-transform: translateY(-50%);
        transform: translateY(-50%);
    }
    [data-tooltip-position="top"]:before {
        bottom: 100%;
        margin-bottom: 6px;
    }
    [data-tooltip-position="right"]:before {
        left: 100%;
        margin-left: 6px;
    }
    [data-tooltip-position="bottom"]:before {
        top: 100%;
        margin-top: 6px;
    }
    [data-tooltip-position="left"]:before {
        right: 100%;
        margin-right: 6px;
    }

    /* Tooltip arrow styling/placement */
    [data-tooltip]:after {
        content: '';
        display: none;
        position: absolute;
        width: 0;
        height: 0;
        border-color: transparent;
        border-style: solid;
    }
    /* Dynamic horizontal centering for the tooltip */
    [data-tooltip-position="top"]:after,
    [data-tooltip-position="bottom"]:after {
        left: 50%;
        margin-left: -6px;
    }
    /* Dynamic vertical centering for the tooltip */
    [data-tooltip-position="right"]:after,
    [data-tooltip-position="left"]:after {
        top: 50%;
        margin-top: -6px;
    }
    [data-tooltip-position="top"]:after {
        bottom: 100%;
        border-width: 6px 6px 0;
        border-top-color: #000;
    }
    [data-tooltip-position="right"]:after {
        left: 100%;
        border-width: 6px 6px 6px 0;
        border-right-color: #000;
    }

    [data-tooltip-position="left"]:after {
        right: 100%;
        border-width: 6px 0 6px 6px;
        border-left-color: #000;
    }
    /* Show the tooltip when hovering */
    [data-tooltip]:hover:before,
    [data-tooltip]:hover:after {
        display: block;
        z-index: 50;
    }

HTML标签可以是这样的:

<p data-tooltip-position="right" data-tooltip="Some tooltip text here" title=" > text here </p> .

<p data-tooltip-position="left" data-tooltip="Some tooltip text here" title=" > text here </p> .

<p data-tooltip-position="top" data-tooltip="Some tooltip text here" title=" > text here </p> .

<p data-tooltip-position="bottom" data-tooltip="Some tooltip text here" title=" > text here </p> .

你可以用简单的css…Jsfiddle这里你可以看到这个例子

下面是工具提示的CSS代码

[data-tooltip] {
  position: relative;
  z-index: 2;
  cursor: pointer;
}

/* Hide the tooltip content by default */
[data-tooltip]:before,
[data-tooltip]:after {
  visibility: hidden;
  -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=0)";
  filter: progid: DXImageTransform.Microsoft.Alpha(Opacity=0);
  opacity: 0;
  pointer-events: none;
}

/* Position tooltip above the element */
[data-tooltip]:before {
  position: absolute;
  bottom: 150%;
  left: 50%;
  margin-bottom: 5px;
  margin-left: -80px;
  padding: 7px;
  width: 160px;
  -webkit-border-radius: 3px;
  -moz-border-radius: 3px;
  border-radius: 3px;
  background-color: #000;
  background-color: hsla(0, 0%, 20%, 0.9);
  color: #fff;
  content: attr(data-tooltip);
  text-align: center;
  font-size: 14px;
  line-height: 1.2;
}

/* Triangle hack to make tooltip look like a speech bubble */
[data-tooltip]:after {
  position: absolute;
  bottom: 150%;
  left: 50%;
  margin-left: -5px;
  width: 0;
  border-top: 5px solid #000;
  border-top: 5px solid hsla(0, 0%, 20%, 0.9);
  border-right: 5px solid transparent;
  border-left: 5px solid transparent;
  content: " ";
  font-size: 0;
  line-height: 0;
}

/* Show tooltip content on hover */
[data-tooltip]:hover:before,
[data-tooltip]:hover:after {
  visibility: visible;
  -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=100)";
  filter: progid: DXImageTransform.Microsoft.Alpha(Opacity=100);
  opacity: 1;
}