Canvas Background Effect

What is a canvas background effect How do you make a canvas background effect? This script and codes were developed by Nick Mkrtchyan on 14 January 2022, Friday.

How do I make an canvas background effect?
  1. Canvas Background Effect Previews
  2. Canvas Background Effect HTML Codes
  3. Canvas Background Effect CSS Codes
  4. Canvas Background Effect JS Codes
Canvas Background Effect Previews

Canvas Background Effect HTML Codes

<!DOCTYPE html>
<html >
<head>
  <meta charset="UTF-8">
  <title>Canvas Background Effect</title>
  <script src="https://s.codepen.io/assets/libs/modernizr.js" type="text/javascript"></script>


  
  
      <style>
      /* NOTE: The styles were added inline because Prefixfree needs access to your styles and they must be inlined if they are on local disk! */
      body {
    margin: 0;
    padding: 0
}
#pixie {
    position:fixed;
    background-color: #164979;
    width:100%;
    height:100%;
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#040429', endColorstr='#257EB7', GradientType=0);
    /* IE6-9 */
    background: -ms-linear-gradient(top, #0E2A55 40%, #0E2A55 40%, #1D6196 60%);
    /* IE10+ */
    background: -webkit-gradient(linear, center top, center bottom, from(#040429), to(#257EB7));
    /* Chrome, Safari 4+ */
    background: -webkit-linear-gradient(center top, #040429, #257EB7) repeat scroll 0 0 rgba(0, 0, 0, 0);
    /* Chrome 10-25, iOS 5+, Safari 5.1+ */
    background: -moz-linear-gradient(center top, #040429, #257EB7) repeat scroll 0 0 rgba(0, 0, 0, 0);
    /* Firefox 3.6-15 */
    background: -o-linear-gradient(center top, #040429, #257EB7) repeat scroll 0 0 rgba(0, 0, 0, 0);
    /* Opera 11.10-12.00 */
    background: linear-gradient(center top, #040429, #257EB7) repeat scroll 0 0 rgba(0, 0, 0, 0);
    /* Chrome 26, Firefox 16+, IE 10+, Opera 12.10+ */
    margin:0;
    padding:0;
}
    </style>

  <script src="https://cdnjs.cloudflare.com/ajax/libs/prefixfree/1.0.7/prefixfree.min.js"></script>

</head>

<body>
  <canvas id="pixie"></canvas>
<div class="container"></div>
<script src="https://code.jquery.com/jquery-1.7.1.min.js" type="text/javascript"></script>
  
    <script src="js/index.js"></script>

</body>
</html>

Canvas Background Effect CSS Codes

body {
    margin: 0;
    padding: 0
}
#pixie {
    position:fixed;
    background-color: #164979;
    width:100%;
    height:100%;
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#040429', endColorstr='#257EB7', GradientType=0);
    /* IE6-9 */
    background: -ms-linear-gradient(top, #0E2A55 40%, #0E2A55 40%, #1D6196 60%);
    /* IE10+ */
    background: -webkit-gradient(linear, center top, center bottom, from(#040429), to(#257EB7));
    /* Chrome, Safari 4+ */
    background: -webkit-linear-gradient(center top, #040429, #257EB7) repeat scroll 0 0 rgba(0, 0, 0, 0);
    /* Chrome 10-25, iOS 5+, Safari 5.1+ */
    background: -moz-linear-gradient(center top, #040429, #257EB7) repeat scroll 0 0 rgba(0, 0, 0, 0);
    /* Firefox 3.6-15 */
    background: -o-linear-gradient(center top, #040429, #257EB7) repeat scroll 0 0 rgba(0, 0, 0, 0);
    /* Opera 11.10-12.00 */
    background: linear-gradient(center top, #040429, #257EB7) repeat scroll 0 0 rgba(0, 0, 0, 0);
    /* Chrome 26, Firefox 16+, IE 10+, Opera 12.10+ */
    margin:0;
    padding:0;
}

Canvas Background Effect JS Codes

function draw() {
    con.clearRect(0, 0, WIDTH, HEIGHT);
    for (var e = 0; e < pxs.length; e++) {
        pxs[e].fade();
        pxs[e].move();
        pxs[e].draw()
    }
}
function Circle() {
    WIDTH = window.innerWidth;
    HEIGHT = window.innerHeight;
    this.s = {
        ttl: 8e3,
        xmax: 5,
        ymax: 2,
        rmax: 10,
        rt: 1,
        xdef: 960,
        ydef: 540,
        xdrift: 4,
        ydrift: 4,
        random: true,
        blink: true
    };
    this.reset = function () {
        this.x = this.s.random ? WIDTH * Math.random() : this.s.xdef;
        this.y = this.s.random ? HEIGHT * Math.random() : this.s.ydef;
        this.r = (this.s.rmax - 1) * Math.random() + 1;
        this.dx = Math.random() * this.s.xmax * (Math.random() < .5 ? -1 : 1);
        this.dy = Math.random() * this.s.ymax * (Math.random() < .5 ? -1 : 1);
        this.hl = this.s.ttl / rint * (this.r / this.s.rmax);
        this.rt = Math.random() * this.hl;
        this.s.rt = Math.random() + 1;
        this.stop = Math.random() * .2 + .4;
        this.s.xdrift *= Math.random() * (Math.random() < .5 ? -1 : 1);
        this.s.ydrift *= Math.random() * (Math.random() < .5 ? -1 : 1)
    };
    this.fade = function () {
        this.rt += this.s.rt
    };
    this.draw = function () {
        if (this.s.blink && (this.rt <= 0 || this.rt >= this.hl)) this.s.rt = this.s.rt * -1;
        else if (this.rt >= this.hl) this.reset();
        var e = 1 - this.rt / this.hl;
        con.beginPath();
        con.arc(this.x, this.y, this.r, 0, Math.PI * 2, true);
        con.closePath();
        var t = this.r * e;
        g = con.createRadialGradient(this.x, this.y, 0, this.x, this.y, t <= 0 ? 1 : t);
        g.addColorStop(0, "rgba(255,255,255," + e + ")");
        g.addColorStop(this.stop, "rgba(77,101,181," + e * .6 + ")");
        g.addColorStop(1, "rgba(77,101,181,0)");
        con.fillStyle = g;
        con.fill()
    };
    this.move = function () {
        WIDTH = window.innerWidth;
        HEIGHT = window.innerHeight;
        this.x += this.rt / this.hl * this.dx;
        this.y += this.rt / this.hl * this.dy;
        if (this.x > WIDTH || this.x < 0) this.dx *= -1;
        if (this.y > HEIGHT || this.y < 0) this.dy *= -1
    };
    this.getX = function () {
        return this.x
    };
    this.getY = function () {
        return this.y
    }
}
var WIDTH;
var HEIGHT;
var canvas;
var con;
var g;
var pxs = new Array;
var rint = 60;
$(document).ready(function () {
    WIDTH = "100%";
    HEIGHT = "100%";
    $("#container").width(WIDTH).height(HEIGHT);
    WIDTH = window.innerWidth;
    HEIGHT = window.innerHeight;
    canvas = document.getElementById("pixie");
    $(canvas).attr("width", WIDTH).attr("height", HEIGHT);
    con = canvas.getContext("2d");
    for (var e = 0; e < 100; e++) {
        pxs[e] = new Circle;
        pxs[e].reset()
    }
    setInterval(draw, rint)
});
$(".services .header2 .service-header").hover(function () {
    var e = $(this);
    e.find("h3").hide();
    $(this).parent().find(".header-bg").stop(true, true).animate({
        width: "100%"
    }, "fast", function () {
        e.find("h3").addClass("active").fadeIn("fast")
    })
}, function () {
    var e = $(this);
    e.find("h3").hide();
    e.parent().find(".header-bg").stop(true, true).animate({
        width: 70
    }, "fast", function () {
        e.find("h3").removeClass("active").fadeIn("fast")
    })
})
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