我有一个这样的div标签:
<div>
<label>Name</label>
<input type="text"/>
</div>
我如何显示一个工具提示:div的悬停，最好有一个淡入/淡出效果。
当前回答
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> .
其他回答
它可以只用CSS，不需要javascript
运行演示
[data-tooltip]:before { /* needed - do not touch */ content: attr(data-tooltip); position: absolute; opacity: 0; /* customizable */ transition: all 0.15s ease; padding: 10px; color: #333; border-radius: 10px; box-shadow: 2px 2px 1px silver; } [data-tooltip]:hover:before { /* needed - do not touch */ opacity: 1; /* customizable */ background: yellow; margin-top: -50px; margin-left: 20px; } [data-tooltip]:not([data-tooltip-persistent]):before { pointer-events: none; } /* FOR TEST PURPOSES ONLY */ div { border: 1px solid silver; background: #ddd; margin: 20px; padding: 10px; } <div>Standard div, no tooltip here</div> <div data-tooltip="Hi, I'm a tooltip. Pretty easy uh ? ;)">Div with standard tooltip. Hover me to see the tooltip. <br/>Hovering the tooltip doesn't matter: <br/>if you hover out of my boundaries, the tooltip will disappear.</div> <div data-tooltip="Hi, I'm a persistent tooltip. I won't disappear when hovering me even if out of my parent boundaries. I'll also prevent other tooltips to fire :)" data-tooltip-persistent="foo">Div with persistent tooltip. Hover me to see the tooltip. <br/>The tooltip won't expire until you hover on me OR it.</div>
Apply a custom HTML attribute, eg. data-tooltip="bla bla" to your object (div or whatever): <div data-tooltip="bla bla"> something here </div> Define the :before pseudoelement of each [data-tooltip] object to be transparent, absolutely positioned and with data-tooltip="" value as content: [data-tooltip]:before { position : absolute; content : attr(data-tooltip); opacity : 0; } Define :hover:before hovering state of each [data-tooltip] to make it visible: [data-tooltip]:hover:before { opacity : 1; } Apply your styles (color, size, position etc) to the tooltip object; end of the story.
在演示中，我定义了另一个规则来指定当鼠标悬停在工具提示上但不在父工具提示上时，工具提示是否必须消失，使用另一个自定义属性data-tooltip-persistent和一个简单的规则:
[data-tooltip]:not([data-tooltip-persistent]):before {
pointer-events: none;
}
注1:浏览器的覆盖范围很广，但可以考虑为旧的IE使用javascript回退(如果需要的话)。
注2:一种增强可能是添加一些javascript来计算鼠标位置，并通过改变应用于它的类将其添加到伪元素中。
试试这个。你可以这样做，只有css和我只添加了数据标题属性的工具提示。
.tooltip { 位置:相对; 显示:inline-block; ｝ .tooltip [data-title]:徘徊:{后 内容:attr (data-title); 填充:4px 8px; 颜色:# fff; 位置:绝对的; 左:0; 上图:110%; 空白:nowrap;} border - radius: 5 px; 背景:# 000; ｝ <div data-title="My tooltip" class="tooltip"> < >标签名称> < /标签 < input type = " text " / > < / div >
下面是一个简单的工具提示实现，它可以考虑鼠标的位置以及窗口的高度和宽度:
function showTooltip(e) { var tooltip = e.target.classList.contains("tooltip") ? e.target : e.target.querySelector(":scope .tooltip"); tooltip.style.left = (e.pageX + tooltip.clientWidth + 10 < document.body.clientWidth) ? (e.pageX + 10 + "px") : (document.body.clientWidth + 5 - tooltip.clientWidth + "px"); tooltip.style.top = (e.pageY + tooltip.clientHeight + 10 < document.body.clientHeight) ? (e.pageY + 10 + "px") : (document.body.clientHeight + 5 - tooltip.clientHeight + "px"); } var tooltips = document.querySelectorAll('.couponcode'); for(var i = 0; i < tooltips.length; i++) { tooltips[i].addEventListener('mousemove', showTooltip); } .couponcode { color: red; cursor: pointer; } .couponcode:hover .tooltip { display: block; } .tooltip { position: absolute; white-space: nowrap; display: none; background: #ffffcc; border: 1px solid black; padding: 5px; z-index: 1000; color: black; } Lorem ipsum dolor sit amet, <span class="couponcode">consectetur adipiscing<span class="tooltip">This is a tooltip</span></span> elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in <span class="couponcode">reprehenderit<span class="tooltip">This is another tooltip</span></span> in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est <span class="couponcode">laborum<span class="tooltip">This is yet another tooltip</span></span>.
(也可以参看这把小提琴)
我为它创造了一个公式。 首先是html
<div class="tooltip-container">
<button class="tooltip-tarjet">
My Button
</button>
<div class="tooltip-element">
This is my tooltip content right here...
</div>
</div>
现在是它的css
.tooltip-container {
/* it contains the tooltip message and the one firing the tooltip
* it has position relative since it allows for a better responsive positioning
* of the tooltip-element */
display: inline-block;
position: relative;
flex-direction: row;
}
.tooltip-tarjet:hover + .tooltip-element {
/* this selector rule matches the tooltip-element right after
* tooltip-tarjet at a hover action
* */
display: inline-block;
position: absolute;
background-color: #869096;
color: white;
opacity: 1;
transition: all 1s;
}
.tooltip-element {
/* here goes the tooltip-element styles and positioning, now your
* tooltip element will always remain to your desired positionno matter
* the screen size at hand
* */
display: none;
opacity: 0;
text-align: center;
padding: 7px;
z-index: 10;
width: 200px;
left: -60px;
bottom: 48px;
border-radius: 5px;
-webkit-border-radius: 5px;
-moz-border-radius: 5px;
font-size: 12px;
line-height: 1.5;
}
你可以用title。它几乎适用于所有事情
<div title="非常适合通过合作结交新朋友。">
<input script=JavaScript type=button title="Click for a compliment" onclick="窗口。alert(“你的头发让我想起了草原上的日落”)”value=“让你快乐”>
<table title="为理解我感受的人工作真是太棒了">
只要想到任何可以在HTML窗口中可见的标签，并在标签中插入title=“whatever tooltip you'd like”，你就得到了一个工具提示。
