用手机打开演示页面会看到右上角有一个圆形菜单按钮,打开它主菜单会以圆形动画展现出来,右上角也会有关闭按钮哦。
菜单结构
<nav>
<ul class="cd-primary-nav">
<li><a href="http://www.sucaihuo.com">首页</a></li>
<li><a href="http://www.sucaihuo.com/js">jQuery</a></li>
<li><a href="http://www.sucaihuo.com/php">PHP</a></li>
<li><a href="http://www.sucaihuo.com/templates">模板</a></li>
</ul>
</nav>
var overlayNav = $('.cd-overlay-nav'),
overlayContent = $('.cd-overlay-content'),
navigation = $('.cd-primary-nav'),
toggleNav = $('.cd-nav-trigger');
//inizialize navigation and content layers
layerInit();
$(window).on('resize', function() {
window.requestAnimationFrame(layerInit);
});
//open/close the menu and cover layers
toggleNav.on('click', function() {
if (!toggleNav.hasClass('close-nav')) {
//it means navigation is not visible yet - open it and animate navigation layer
toggleNav.addClass('close-nav');
overlayNav.children('span').velocity({
translateZ: 0,
scaleX: 1,
scaleY: 1,
}, 500, 'easeInCubic', function() {
navigation.addClass('fade-in');
});
} else {
//navigation is open - close it and remove navigation layer
toggleNav.removeClass('close-nav');
overlayContent.children('span').velocity({
translateZ: 0,
scaleX: 1,
scaleY: 1,
}, 500, 'easeInCubic', function() {
navigation.removeClass('fade-in');
overlayNav.children('span').velocity({
translateZ: 0,
scaleX: 0,
scaleY: 0,
}, 0);
overlayContent.addClass('is-hidden').one('webkitTransitionEnd otransitionend oTransitionEnd msTransitionEnd transitionend', function() {
overlayContent.children('span').velocity({
translateZ: 0,
scaleX: 0,
scaleY: 0,
}, 0, function() {
overlayContent.removeClass('is-hidden')
});
});
if ($('html').hasClass('no-csstransitions')) {
overlayContent.children('span').velocity({
translateZ: 0,
scaleX: 0,
scaleY: 0,
}, 0, function() {
overlayContent.removeClass('is-hidden')
});
}
});
}
});
function layerInit() {
var diameterValue = (Math.sqrt(Math.pow($(window).height(), 2) + Math.pow($(window).width(), 2)) * 2);
overlayNav.children('span').velocity({
scaleX: 0,
scaleY: 0,
translateZ: 0,
}, 50).velocity({
height: diameterValue + 'px',
width: diameterValue + 'px',
top: -(diameterValue / 2) + 'px',
left: -(diameterValue / 2) + 'px',
}, 0);
overlayContent.children('span').velocity({
scaleX: 0,
scaleY: 0,
translateZ: 0,
}, 50).velocity({
height: diameterValue + 'px',
width: diameterValue + 'px',
top: -(diameterValue / 2) + 'px',
left: -(diameterValue / 2) + 'px',
}, 0);
}
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