js css实现垂直方向自适应的三角提示菜单
作者：jianghejie123
这篇文章主要为大家详细介绍了js css实现垂直方向自适应的三角提示菜单的相关资料,需要的朋友可以参考下
这是一个比较简单实用的菜单，最重要的是他不需要引用jQuery库。菜单在垂直方向上能做到自适应，当主菜单靠近顶部，子菜单将会在下面，当主菜单靠近底部，子菜单在上面。运用Modernizr的触摸检测功能，我们可以让子菜单的响应在pc上是hover，而在触摸设备上是点击。例子中还示范了如何在宽度比较窄的情况下如何调整布局。
html代码
<ul id="cbp-tm-menu" class="cbp-tm-menu">
<li>
<a href="#">Home</a>
</li>
<li>
<a href="#">Veggie made</a>
<ul class="cbp-tm-submenu">
<li><a href="#" class="cbp-tm-icon-archive">Sorrel desert</a></li>
<li><a href="#" class="cbp-tm-icon-cog">Raisin kakadu</a></li>
<li><a href="#" class="cbp-tm-icon-location">Plum salsify</a></li>
<li><a href="#" class="cbp-tm-icon-users">Bok choy celtuce</a></li>
<li><a href="#" class="cbp-tm-icon-earth">Onion endive</a></li>
<li><a href="#" class="cbp-tm-icon-location">Bitterleaf</a></li>
<li><a href="#" class="cbp-tm-icon-mobile">Sea lettuce</a></li>
</ul>
</li>
<li>
<a href="#">Pepper tatsoi</a>
<ul class="cbp-tm-submenu">
<li><a href="#" class="cbp-tm-icon-archive">Brussels sprout</a></li>
<li><a href="#" class="cbp-tm-icon-cog">Kakadu lemon</a></li>
<li><a href="#" class="cbp-tm-icon-link">Juice green</a></li>
<li><a href="#" class="cbp-tm-icon-users">Wine fruit</a></li>
<li><a href="#" class="cbp-tm-icon-earth">Garlic mint</a></li>
<li><a href="#" class="cbp-tm-icon-location">Zucchini garnish</a></li>
<li><a href="#" class="cbp-tm-icon-mobile">Sea lettuce</a></li>
</ul>
</li>
<li>
<a href="#">Sweet melon</a>
<ul class="cbp-tm-submenu">
<li><a href="#" class="cbp-tm-icon-screen">Sorrel desert</a></li>
<li><a href="#" class="cbp-tm-icon-mail">Raisin kakadu</a></li>
<li><a href="#" class="cbp-tm-icon-contract">Plum salsify</a></li>
<li><a href="#" class="cbp-tm-icon-pencil">Bok choy celtuce</a></li>
<li><a href="#" class="cbp-tm-icon-article">Onion endive</a></li>
<li><a href="#" class="cbp-tm-icon-clock">Bitterleaf</a></li>
</ul>
</li>
</ul>
css代码
/* Iconfont made with icomoon.com */
@font-face {
font-family: 'cbp-tmicons';
src:url('../fonts/tmicons/cbp-tmicons.eot');
src:url('../fonts/tmicons/cbp-tmicons.eot?#iefix') format('embedded-opentype'),
url('../fonts/tmicons/cbp-tmicons.woff') format('woff'),
url('../fonts/tmicons/cbp-tmicons.ttf') format('truetype'),
url('../fonts/tmicons/cbp-tmicons.svg#cbp-tmicons') format('svg');
font-weight: normal;
font-style: normal;
}
/* reset list style */
.cbp-tm-menu,
.cbp-tm-menu ul {
list-style: none;
}
/* set menu position; change here to set to relative or float, etc. */
.cbp-tm-menu {
display: block;
position: absolute;
z-index: 1000;
bottom: 0;
width: 100%;
background: #47a3da;
text-align: right;
padding: 0 2em;
margin: 0;
text-transform: capitalize;
}
/* first level menu items */
.cbp-tm-menu > li {
display: inline-block;
margin: 0 2.6em;
position: relative;
}
.cbp-tm-menu > li > a {
line-height: 4em;
padding: 0 0.3em;
font-size: 1.2em;
display: block;
color: #fff;
}
.no-touch .cbp-tm-menu > li > a:hover,
.no-touch .cbp-tm-menu > li > a:active {
color: #02639d;
}
/* sumbenu with transitions */
.cbp-tm-submenu {
position: absolute;
display: block;
visibility: hidden;
opacity: 0;
padding: 0;
text-align: left;
pointer-events: none;
-webkit-transition: visibility 0s, opacity 0s;
-moz-transition: visibility 0s, opacity 0s;
transition: visibility 0s, opacity 0s;
}
.cbp-tm-show .cbp-tm-submenu {
width: 16em;
left: 50%;
margin: 0 0 0 -8em;
opacity: 1;
visibility: visible;
pointer-events: auto;
-webkit-transition: visibility 0s, opacity 0.3s;
-moz-transition: visibility 0s, opacity 0.3s;
transition: visibility 0s, opacity 0.3s;
}
.cbp-tm-show-above .cbp-tm-submenu {
bottom: 100%;
padding-bottom: 10px;
}
.cbp-tm-show-below .cbp-tm-submenu {
top: 100%;
padding-top: 10px;
}
/* extreme cases: not enough space on the sides */
.cbp-tm-nospace-right .cbp-tm-submenu {
right: 0;
left: auto;
}
.cbp-tm-nospace-left .cbp-tm-submenu {
left: 0;
}
/* last menu item has to fit on the screen */
.cbp-tm-menu > li:last-child .cbp-tm-submenu {
right: 0;
}
/*
arrow: depending on where the menu will be shown, we set
the right position for the arrow
*/
.cbp-tm-submenu:after {
border: solid transparent;
content: " ";
height: 0;
width: 0;
position: absolute;
pointer-events: none;
}
.cbp-tm-show-above .cbp-tm-submenu:after {
top: 100%;
margin-top: -10px;
}
.cbp-tm-show-below .cbp-tm-submenu:after {
bottom: 100%;
margin-bottom: -10px;
}
.cbp-tm-submenu:after {
border-color: transparent;
border-width: 16px;
margin-left: -16px;
left: 50%;
}
.cbp-tm-show-above .cbp-tm-submenu:after {
border-top-color: #fff;
}
.cbp-tm-show-below .cbp-tm-submenu:after {
border-bottom-color: #fff;
}
.cbp-tm-submenu > li {
display: block;
background: #fff;
}
.cbp-tm-submenu > li > a {
padding: 5px 2.3em 5px 0.6em; /* top/bottom paddings in 'em' cause a tiny "jump" in Chrome on Win */
display: block;
font-size: 1.2em;
position: relative;
color: #47a3da;
border: 4px solid #fff;
-webkit-transition: all 0.2s;
-moz-transition: all 0.2s;
transition: all 0.2s;
}
.no-touch .cbp-tm-submenu > li > a:hover,
.no-touch .cbp-tm-submenu > li > a:active {
color: #fff;
background: #47a3da;
}
/* the icons (main level menu icon and sublevel icons) */
.cbp-tm-submenu li a:before,
.cbp-tm-menu > li > a:before {
font-family: 'cbp-tmicons';
speak: none;
font-style: normal;
font-weight: normal;
font-variant: normal;
text-transform: none;
line-height: 1;
vertical-align: middle;
margin-right: 0.6em;
-webkit-font-smoothing: antialiased;
}
.cbp-tm-submenu li a:before {
position: absolute;
top: 50%;
margin-top: -0.5em;
right: 0.5em;
}
.cbp-tm-menu > li > a:not(:only-child):before {
content: "\f0c9";
font-size: 60%;
opacity: 0.3;
}
.cbp-tm-icon-archive:before {
content: "\e002";
}
.cbp-tm-icon-cog:before {
content: "\e003";
}
.cbp-tm-icon-users:before {
content: "\e004";
}
.cbp-tm-icon-earth:before {
content: "\e005";
}
.cbp-tm-icon-location:before {
content: "\e006";
}
.cbp-tm-icon-mobile:before {
content: "\e007";
}
.cbp-tm-icon-screen:before {
content: "\e008";
}
.cbp-tm-icon-mail:before {
content: "\e009";
}
.cbp-tm-icon-contract:before {
content: "\e00a";
}
.cbp-tm-icon-pencil:before {
content: "\e00b";
}
.cbp-tm-icon-article:before {
content: "\e00c";
}
.cbp-tm-icon-clock:before {
content: "\e00d";
}
.cbp-tm-icon-videos:before {
content: "\e00e";
}
.cbp-tm-icon-pictures:before {
content: "\e00f";
}
.cbp-tm-icon-link:before {
content: "\e010";
}
.cbp-tm-icon-refresh:before {
content: "\e011";
}
.cbp-tm-icon-help:before {
content: "\e012";
}
/* Media Queries */
@media screen and (max-width: 55.6875em) {
.cbp-tm-menu {
font-size: 80%;
}
}
@media screen and (max-height: 25.25em), screen and (max-width: 44.3125em) {
.cbp-tm-menu {
font-size: 100%;
position: relative;
text-align: center;
padding: 0;
top: auto;
}
.cbp-tm-menu > li {
display: block;
margin: 0;
border-bottom: 4px solid #3793ca;
}
.cbp-tm-menu > li:first-child {
border-top: 4px solid #3793ca;
}
li.cbp-tm-show > a,
.no-touch .cbp-tm-menu > li > a:hover,
.no-touch .cbp-tm-menu > li > a:active {
color: #fff;
background: #02639d;
}
.cbp-tm-submenu {
position: relative;
display: none;
width: 100%;
}
.cbp-tm-submenu > li {
padding: 0;
}
.cbp-tm-submenu > li > a {
padding: 0.6em 2.3em 0.6em 0.6em;
border: none;
border-bottom: 2px solid #6fbbe9;
}
.cbp-tm-submenu:after {
display: none;
}
.cbp-tm-menu .cbp-tm-show .cbp-tm-submenu {
display: block;
width: 100%;
left: 0;
margin: 0;
padding: 0;
bottom: auto;
top: auto;
}
}
javascript代码
/**
* cbpTooltipMenu.js v1.0.0
* http://www.codrops.com
*
* Licensed under the MIT license.
* http://www.opensource.org/licenses/mit-license.php
*
* Copyright 2013, Codrops
* http://www.codrops.com
*/
;( function( window ) {
'use strict';
var document = window.document,
docElem = document.documentElement;
function extend( a, b ) {
for( var key in b ) {
if( b.hasOwnProperty( key ) ) {
a[key] = b[key];
}
}
return a;
}
// from https://github.com/ryanve/response.js/blob/master/response.js
function getViewportH() {
var client = docElem['clientHeight'],
inner = window['innerHeight'];
if( client < inner )
return inner;
else
return client;
}
// http://stackoverflow.com/a/11396681/989439
function getOffset( el ) {
return el.getBoundingClientRect();
}
// http://snipplr.com/view.php?codeview&id=5259
function isMouseLeaveOrEnter(e, handler) {
if (e.type != 'mouseout' && e.type != 'mouseover') return false;
var reltg = e.relatedTarget ? e.relatedTarget :
e.type == 'mouseout' ? e.toElement : e.fromElement;
while (reltg && reltg != handler) reltg = reltg.parentNode;
return (reltg != handler);
}
function cbpTooltipMenu( el, options ) {
this.el = el;
this.options = extend( this.defaults, options );
this._init();
}
cbpTooltipMenu.prototype = {
defaults : {
// add a timeout to avoid the menu to open instantly
delayMenu : 100
},
_init : function() {
this.touch = Modernizr.touch;
this.menuItems = document.querySelectorAll( '#' + this.el.id + ' > li' );
this._initEvents();
},
_initEvents : function() {
var self = this;
Array.prototype.slice.call( this.menuItems ).forEach( function( el, i ) {
var trigger = el.querySelector( 'a' );
if( self.touch ) {
trigger.addEventListener( 'click', function( ev ) { self._handleClick( this, ev ); } );
}
else {
trigger.addEventListener( 'click', function( ev ) {
if( this.parentNode.querySelector( 'ul.cbp-tm-submenu' ) ) {
ev.preventDefault();
}
} );
el.addEventListener( 'mouseover', function(ev) { if( isMouseLeaveOrEnter( ev, this ) ) self._openMenu( this ); } );
el.addEventListener( 'mouseout', function(ev) { if( isMouseLeaveOrEnter( ev, this ) ) self._closeMenu( this ); } );
}
} );
},
_openMenu : function( el ) {
var self = this;
clearTimeout( this.omtimeout );
this.omtimeout = setTimeout( function() {
var submenu = el.querySelector( 'ul.cbp-tm-submenu' );
if( submenu ) {
el.className = 'cbp-tm-show';
if( self._positionMenu( el ) === 'top' ) {
el.className += ' cbp-tm-show-above';
}
else {
el.className += ' cbp-tm-show-below';
}
}
}, this.touch ? 0 : this.options.delayMenu );
},
_closeMenu : function( el ) {
clearTimeout( this.omtimeout );
var submenu = el.querySelector( 'ul.cbp-tm-submenu' );
if( submenu ) {
// based on https://github.com/desandro/classie/blob/master/classie.js
el.className = el.className.replace(new RegExp("(^|\\s+)" + "cbp-tm-show" + "(\\s+|$)"), ' ');
el.className = el.className.replace(new RegExp("(^|\\s+)" + "cbp-tm-show-below" + "(\\s+|$)"), ' ');
el.className = el.className.replace(new RegExp("(^|\\s+)" + "cbp-tm-show-above" + "(\\s+|$)"), ' ');
}
},
_handleClick : function( el, ev ) {
var item = el.parentNode,
items = Array.prototype.slice.call( this.menuItems ),
submenu = item.querySelector( 'ul.cbp-tm-submenu' )
// first close any opened one..
if( this.current && items.indexOf( item ) !== this.current ) {
this._closeMenu( this.el.children[ this.current ] );
this.el.children[ this.current ].querySelector( 'ul.cbp-tm-submenu' ).setAttribute( 'data-open', 'false' );
}
if( submenu ) {
ev.preventDefault();
var isOpen = submenu.getAttribute( 'data-open' );
if( isOpen === 'true' ) {
this._closeMenu( item );
submenu.setAttribute( 'data-open', 'false' );
}
else {
this._openMenu( item );
this.current = items.indexOf( item );
submenu.setAttribute( 'data-open', 'true' );
}
}
},
_positionMenu : function( el ) {
// checking where's more space left in the viewport: above or below the element
var vH = getViewportH(),
ot = getOffset(el),
spaceUp = ot.top ,
spaceDown = vH - spaceUp - el.offsetHeight;
return ( spaceDown <= spaceUp ? 'top' : 'bottom' );
}
}
// add to global namespace
window.cbpTooltipMenu = cbpTooltipMenu;
} )( window );
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。