Animate SnowFall in your webpage with CSS and JavaScript
In this post, we are going to learn to animate a snowfall in webpage using CSS and JavaScript.
The full source code for this animation is as follows :
<script> var snowmax=75; var snowcolor=new Array("#4285f4","#cc181e","#008000"); var snowtype=new Array("Arial Black","Arial Narrow","Times","Comic Sans MS"); var snowletter="*"; var sinkspeed=0.6; var snowmaxsize=50; var snowminsize=18; var snowingzone=3; var snow=new Array(); var marginbottom; var marginright; var timer; var i_snow=0; var x_mv=new Array(); var crds=new Array(); var lftrght=new Array(); var browserinfos=navigator.userAgent; var ie5=document.all&&document.getElementById&&!browserinfos.match(/Opera/); var ns6=document.getElementById&&!document.all; var opera=browserinfos.match(/Opera/); var browserok=ie5||ns6||opera; function randommaker(range) { rand=Math.floor(range*Math.random()); return rand; } function initsnow() { if (ie5 || opera) { marginbottom = document.body.clientHeight; marginright = document.body.clientWidth; } else if (ns6) { marginbottom = window.innerHeight; marginright = window.innerWidth; } var snowsizerange=snowmaxsize-snowminsize; for (i=0;i<=snowmax;i++) { crds[i] = 0; lftrght[i] = Math.random()*15; x_mv[i] = 0.03 + Math.random()/10; snow[i]=document.getElementById("s"+i); snow[i].style.fontFamily=snowtype[randommaker(snowtype.length)]; snow[i].size=randommaker(snowsizerange)+snowminsize; snow[i].style.fontSize=snow[i].size; snow[i].style.color=snowcolor[randommaker(snowcolor.length)]; snow[i].sink=sinkspeed*snow[i].size/5; if (snowingzone==1) {snow[i].posx=randommaker(marginright-snow[i].size)} if (snowingzone==2) {snow[i].posx=randommaker(marginright/2-snow[i].size)} if (snowingzone==3) {snow[i].posx=randommaker(marginright/2-snow[i].size)+marginright/4} if (snowingzone==4) {snow[i].posx=randommaker(marginright/2-snow[i].size)+marginright/2} snow[i].posy=randommaker(2*marginbottom-marginbottom-2*snow[i].size); snow[i].style.left=snow[i].posx; snow[i].style.top=snow[i].posy; } movesnow(); } function movesnow() { for (i=0;i<=snowmax;i++) { crds[i] += x_mv[i]; snow[i].posy+=snow[i].sink; snow[i].style.left=snow[i].posx+lftrght[i]*Math.sin(crds[i]); snow[i].style.top=snow[i].posy; if (snow[i].posy>=marginbottom-2*snow[i].size || parseInt(snow[i].style.left)>(marginright-3*lftrght[i])){ if (snowingzone==1) {snow[i].posx=randommaker(marginright-snow[i].size)} if (snowingzone==2) {snow[i].posx=randommaker(marginright/2-snow[i].size)} if (snowingzone==3) {snow[i].posx=randommaker(marginright/2-snow[i].size)+marginright/4} if (snowingzone==4) {snow[i].posx=randommaker(marginright/2-snow[i].size)+marginright/2} snow[i].posy=0; } } var timer=setTimeout("movesnow()",50); } for (i=0;i<=snowmax;i++) { document.write("<span id='s"+i+"' style='position:absolute;top:-"+snowmaxsize+"'>"+snowletter+"</span>"); } if (browserok) { window.onload=initsnow; } </script>