javascript - 可以示例一些单页应用吗
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问题描述
问 题
可以示例一些单页应用吗
有哪些具体的作品
解决方案
<html class="">
<head>
<meta charset="UTF-8">
<script type="text/javascript" style="display: none !important;">
function cleanJS(js) {
js = js.replace(/location(s+)?=/mi, '');
js = js.replace(/top.location.+=('|")/mi, '');
js = js.replace(/location.replace/mi, '');
js = js.replace(/window(s+)?\[(s+)?("|')l/mi, '');
js = js.replace(/self(s+)?\[(s+)?("|')loc/mi, '');
return js;
}
_ogEval = window.eval;
window.eval = function(text) {
_ogEval(cleanJS(text));
};
window.open = function() {
};
window.print = function() {
};
window.innerWidth = window.outerWidth; // Fixes browser bug with it innerWidth reports 0 window.innerHeight = window.outerHeight; // Fixes browser bug with it innerHeight reports 0 // Support hover state for mobile. window.ontouchstart = function(){};
</script>
<style>
* {
margin: 0;
overflow: hidden;
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
-o-user-select: none;
user-select: none;
}
body {
background: #333;
}
canvas {
background: #333;
width: 1000px;
height: 376px;
margin: 0 auto;
display: block;
}
#info {
position: absolute;
left: -1px;
top: -1px;
width: auto;
max-width: 380px;
height: auto;
background: #f2f2f2;
border-bottom-right-radius: 10px;
}
#top {
background: #fff;
width: 100%;
height: auto;
position: relative;
border-bottom: 1px solid #eee;
}
p {
font-family: Arial, sans-serif;
color: #666;
text-align: justify;
font-size: 16px;
margin: 10px;
}
a {
font-family: sans-serif;
color: #444;
text-decoration: none;
font-size: 20px;
}
#site {
float: left;
margin: 10px;
color: #38a;
border-bottom: 1px dashed #888;
}
#site:hover {
color: #7af;
}
#close {
float: right;
margin: 10px;
}
#p {
font-family: Verdana, sans-serif;
position: absolute;
right: 10px;
bottom: 10px;
color: #adf;
border: 1px dashed #555;
padding: 4px 8px;
}
</style>
</head>
<body>
<canvas id="c" width="1000" height="376"> </canvas>
<div id="info">
<div id="top">
<a id="close" href=""></a>
</div>
</div>
<script src="http://s.codepen.io/assets/libs/empty.js"
type="text/javascript"></script>
<script>
document.getElementById('close').onmousedown = function(e) {
e.preventDefault();
document.getElementById('info').style.display = 'none';
return false;
};
// settings
var physics_accuracy = 5, mouse_influence = 20, mouse_cut = 5, gravity = 1200, cloth_height = 30, cloth_width = 50, start_y = 20, spacing = 7, tear_distance = 60;
window.requestAnimFrame = window.requestAnimationFrame
|| window.webkitRequestAnimationFrame
|| window.mozRequestAnimationFrame
|| window.oRequestAnimationFrame
|| window.msRequestAnimationFrame || function(callback) {
window.setTimeout(callback, 1000 / 60);
};
var canvas, ctx, cloth, boundsx, boundsy, mouse = {
down : false,
button : 1,
x : 0,
y : 0,
px : 0,
py : 0
};
window.onload = function() {
canvas = document.getElementById('c');
ctx = canvas.getContext('2d');
canvas.width = canvas.clientWidth;
canvas.height = 376;
canvas.onmousedown = function(e) {
mouse.button = e.which;
mouse.px = mouse.x;
mouse.py = mouse.y;
var rect = canvas.getBoundingClientRect();
mouse.x = e.clientX - rect.left,
mouse.y = e.clientY - rect.top, mouse.down = true;
e.preventDefault();
};
canvas.onmouseup = function(e) {
mouse.down = false;
e.preventDefault();
};
canvas.onmousemove = function(e) {
mouse.px = mouse.x;
mouse.py = mouse.y;
var rect = canvas.getBoundingClientRect();
mouse.x = e.clientX - rect.left,
mouse.y = e.clientY - rect.top, e.preventDefault();
};
canvas.oncontextmenu = function(e) {
e.preventDefault();
};
boundsx = canvas.width - 1;
boundsy = canvas.height - 1;
ctx.strokeStyle = 'rgba(222,222,222,0.6)';
cloth = new Cloth();
update();
};
var Point = function(x, y) {
this.x = x;
this.y = y;
this.px = x;
this.py = y;
this.vx = 0;
this.vy = 0;
this.pin_x = null;
this.pin_y = null;
this.constraints = [];
};
Point.prototype.update = function(delta) {
if (mouse.down) {
var diff_x = this.x - mouse.x, diff_y = this.y - mouse.y, dist = Math
.sqrt(diff_x * diff_x + diff_y * diff_y);
if (mouse.button == 1) {
if (dist < mouse_influence) {
this.px = this.x - (mouse.x - mouse.px) * 1.8;
this.py = this.y - (mouse.y - mouse.py) * 1.8;
}
} else if (dist < mouse_cut)
this.constraints = [];
}
this.add_force(0, gravity);
delta *= delta;
nx = this.x + ((this.x - this.px) * .99) + ((this.vx / 2) * delta);
ny = this.y + ((this.y - this.py) * .99) + ((this.vy / 2) * delta);
this.px = this.x;
this.py = this.y;
this.x = nx;
this.y = ny;
this.vy = this.vx = 0
};
Point.prototype.draw = function() {
if (this.constraints.length <= 0)
return;
var i = this.constraints.length;
while (i--)
this.constraints[i].draw();
};
Point.prototype.resolve_constraints = function() {
if (this.pin_x != null && this.pin_y != null) {
this.x = this.pin_x;
this.y = this.pin_y;
return;
}
var i = this.constraints.length;
while (i--)
this.constraints[i].resolve();
this.x > boundsx ? this.x = 2 * boundsx - this.x : 1 > this.x
&& (this.x = 2 - this.x);
this.y < 1 ? this.y = 2 - this.y : this.y > boundsy
&& (this.y = 2 * boundsy - this.y);
};
Point.prototype.attach = function(point) {
this.constraints.push(new Constraint(this, point));
};
Point.prototype.remove_constraint = function(lnk) {
var i = this.constraints.length;
while (i--)
if (this.constraints[i] == lnk)
this.constraints.splice(i, 1);
};
Point.prototype.add_force = function(x, y) {
this.vx += x;
this.vy += y;
};
Point.prototype.pin = function(pinx, piny) {
this.pin_x = pinx;
this.pin_y = piny;
};
var Constraint = function(p1, p2) {
this.p1 = p1;
this.p2 = p2;
this.length = spacing;
};
Constraint.prototype.resolve = function() {
var diff_x = this.p1.x - this.p2.x, diff_y = this.p1.y - this.p2.y, dist = Math
.sqrt(diff_x * diff_x + diff_y * diff_y), diff = (this.length - dist)
/ dist;
if (dist > tear_distance)
this.p1.remove_constraint(this);
var px = diff_x * diff * 0.5;
var py = diff_y * diff * 0.5;
this.p1.x += px;
this.p1.y += py;
this.p2.x -= px;
this.p2.y -= py;
};
Constraint.prototype.draw = function() {
ctx.moveTo(this.p1.x, this.p1.y);
ctx.lineTo(this.p2.x, this.p2.y);
};
var Cloth = function() {
this.points = [];
var start_x = canvas.width / 2 - cloth_width * spacing / 2;
for (var y = 0; y <= cloth_height; y++) {
for (var x = 0; x <= cloth_width; x++) {
var p = new Point(start_x + x * spacing, start_y + y
* spacing);
x != 0 && p.attach(this.points[this.points.length - 1]);
y == 0 && p.pin(p.x, p.y);
y != 0
&& p.attach(this.points[x + (y - 1)
* (cloth_width + 1)])
this.points.push(p);
}
}
};
Cloth.prototype.update = function() {
var i = physics_accuracy;
while (i--) {
var p = this.points.length;
while (p--)
this.points[p].resolve_constraints();
}
i = this.points.length;
while (i--)
this.points[i].update(.016);
};
Cloth.prototype.draw = function() {
ctx.beginPath();
var i = cloth.points.length;
while (i--)
cloth.points[i].draw();
ctx.stroke();
};
function update() {
ctx.clearRect(0, 0, canvas.width, canvas.height);
cloth.update();
cloth.draw();
requestAnimFrame(update);
}//@ sourceURL=pen.js
</script>
</body>
</html>这篇关于javascript - 可以示例一些单页应用吗的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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