<!doctype html>
倾斜打开侧边栏
点击左上角的按钮打开菜单
适用浏览器：360、FireFox、Chrome、Safari、Opera、傲游、搜狗、世界之窗.
不支持IE8及以下浏览器。
来源：A5源码
var paperMenu = {
$window: $('#paper-window'),
$paperFront: $('#paper-front'),
$hamburger: $('.hamburger'),
offset: 1800,
pageHeight: $('#paper-front').outerHeight(),
open: function () {
this.$window.addClass('tilt');
this.$hamburger.off('click');
$('#container, .hamburger').on('click', this.close.bind(this));
this.hamburgerFix(true);
// console.log('opening...');
},
close: function () {
this.$window.removeClass('tilt');
$('#container, .hamburger').off('click');
this.$hamburger.on('click', this.open.bind(this));
this.hamburgerFix(false);
// console.log('closing...');
},
updateTransformOrigin: function () {
scrollTop = this.$window.scrollTop();
equation = (scrollTop + this.offset) / this.pageHeight * 100;
this.$paperFront.css('transform-origin', 'center ' + equation + '%');
},
hamburgerFix: function (opening) {
if (opening) {
$('.hamburger').css({
position: 'absolute',
top: this.$window.scrollTop() + 30 + 'px'
});
} else {
setTimeout(function () {
$('.hamburger').css({
position: 'fixed',
top: '30px'
});
}, 300);
}
},
bindEvents: function () {
this.$hamburger.on('click', this.open.bind(this));
$('.close').on('click', this.close.bind(this));
this.$window.on('scroll', this.updateTransformOrigin.bind(this));
},
init: function () {
this.bindEvents();
this.updateTransformOrigin();
}
};
paperMenu.init();