I am attempting to create a 'snow' effect on the background of a particular div with a red border. Here is the code, but you can also view it here:
<!-- language: lang-js -->
var width = getWidth();
var height = getHeight();
var flakeCount = 50;
var gravity = 0.7;
var windSpeed = 20;
var flakes = [];
function getWidth() {
var x = 0;
if (self.innerHeight) {
x = self.innerWidth;
}
else if (document.documentElement && document.documentElement.clientHeight) {
x = document.documentElement.clientWidth;
}
else if (document.body) {
x = document.body.clientWidth;
}
return x;
}
function getHeight() {
var y = 0;
if (self.innerHeight) {
y = self.innerHeight;
}
else if (document.documentElement && document.documentElement.clientHeight) {
y = document.documentElement.clientHeight;
}
else if (document.body) {
y = document.body.clientHeight;
}
return y;
}
function getRandom(min, max) {
return Math.floor(Math.random() * (max - min + 1)) + min;
}
var currentFlake = 0;
var snowglobe = document.getElementById("snowglobe");
while (currentFlake < flakeCount) {
var flake = document.createElement("div");
flake.className = 'flake';
flake.style.fontSize = getRandom(12, 24) + 'px';
flake.style.top = getRandom(0, height) + 'px';
flake.style.left = getRandom(0, width) + 'px';
flake.innerHTML = "•";
newFlake = snowglobe.appendChild(flake);
newFlake.speed = getRandom(1, 100);
flakes.push(newFlake);
currentFlake++;
}
function doAnimation() {
for (var i = 0; i < flakes.length; i++) {
newY = parseFloat(flakes[i].style.top) + (flakes[i].speed / 100) * gravity;
newX = false;
// Calculate Y position
if (newY > height) {
newY = 0 - parseInt(flakes[i].style.fontSize);
// If Y is at bottom, randomize X
newX = getRandom(0, width);
}
// Calculate X position if it hasn't been set randomly
if (!newX) newX = parseFloat(flakes[i].style.left) + Math.sin(newY / windSpeed);
if (newX < -20) newX = width + 20;
if (newX > width + 20) newX = -20;
// Set new position
flakes[i].style.top = newY + 'px';
flakes[i].style.left = newX + 'px';
}
}
setInterval(doAnimation, 10);
window.onresize = function(event) {
width = getWidth();
height = getHeight();
}
<!-- language: lang-css -->
#snowglobe .flake {
position: absolute;
width: 1px;
height: 1px;
color: rgba(255,255,255,0);
text-shadow: 0 0 3px rgba(255,255,255,1);
}
<!-- language: lang-html -->
<div class="ui-full-width">
<div class="container even" id="snowglobe">
<h3><span class="num">4</span>Add freshly boiled water to the pot</h3>
<p>Give it a stir and secure the lid. Wrap your pot in a tea-cosy if it's nippy outside!</p>
</div>
</div>
<!-- end snippet -->
<div class="ui-full-width">
<div class="container even" id="snowglobe">
<h3><span class="num">4</span>Add freshly boiled water to the pot</h3>
<p>Give it a stir and secure the lid. Wrap your pot in a tea-cosy if it's nippy outside!</p>
</div>
</div>