JavaScript Best Codes

                                                
                                                <!-- this script is provided by https://www.javascriptfreecode.com coded by: Kerixa Inc. -->
<!-- START OF Mouse Cursor Crosshairs DHTML -->


<!-- SUMMARY BRIEF

	This DHTML script will make a crosshair to follow
	your mouse cursor around.

	You can change the color of the crosshair by changing
	the color hex codes in the <style> tag in the <head>
	of your document.

-->


<!-- Put this portion of the script inside of your <HEAD> tag -->


<style>
<!--

#leftright, #topdown{

	position: absolute;
	left: 0;
	top: 0;
	width: 1px;
	height: 1px;
	layer-background-color: #FF0000;
	background-color: #FF0000;
	z-index: 100;
	font-size: 1px;
}

-->
</style>


<!-- Put this code after your <BODY> tag. -->


<div id="leftright" style="width:expression(document.body.clientWidth-2)"></div>
<div id="topdown" style="height:expression(document.body.clientHeight-2)"></div>

<script language="JavaScript1.2">
<!--

if (document.all&&!window.print){
leftright.style.width=document.body.clientWidth-2
topdown.style.height=document.body.clientHeight-2
}
else if (document.layers){
document.leftright.clip.width=window.innerWidth
document.leftright.clip.height=1
document.topdown.clip.width=1
document.topdown.clip.height=window.innerHeight
}


function followmouse1(){
//move cross engine for IE 4+
leftright.style.pixelTop=document.body.scrollTop+event.clientY+1
topdown.style.pixelTop=document.body.scrollTop
if (event.clientX<document.body.clientWidth-2)
topdown.style.pixelLeft=document.body.scrollLeft+event.clientX+1
else
topdown.style.pixelLeft=document.body.clientWidth-2
}

function followmouse2(e){
//move cross engine for NS 4+
document.leftright.top=e.y+1
document.topdown.top=pageYOffset
document.topdown.left=e.x+1
}

if (document.all)
document.onmousemove=followmouse1
else if (document.layers){
window.captureEvents(Event.MOUSEMOVE)
window.onmousemove=followmouse2
}

function regenerate(){
window.location.reload()
}
function regenerate2(){
setTimeout("window.onresize=regenerate",400)
}
if ((document.all&&!window.print)||document.layers)
//if the user is using IE 4 or NS 4, both NOT IE 5+
window.onload=regenerate2

//-->
</script>
<!-- END OF Mouse Cursor Crosshairs DHTML -->
<style>
body {
    background-color: #000000;
    padding: 0;
    margin: 0;
    overflow: hidden;
}
</style>
<canvas id='world'></canvas>
<script>
// One of my first <canvas> experiments, woop! :D 

var SCREEN_WIDTH = window.innerWidth;
var SCREEN_HEIGHT = window.innerHeight;

var RADIUS = 70;

var RADIUS_SCALE = 1;
var RADIUS_SCALE_MIN = 1;
var RADIUS_SCALE_MAX = 1.5;

var QUANTITY = 2;

var canvas;
var context;
var particles;

var mouseX = SCREEN_WIDTH * 0.5;
var mouseY = SCREEN_HEIGHT * 0.5;
var mouseIsDown = false;

function init() {

    canvas = document.getElementById('world');

    if (canvas && canvas.getContext) {
        context = canvas.getContext('2d');

        // Register event listeners
        window.addEventListener('mousemove', documentMouseMoveHandler, false);
        window.addEventListener('mousedown', documentMouseDownHandler, false);
        window.addEventListener('mouseup', documentMouseUpHandler, false);
        document.addEventListener('touchstart', documentTouchStartHandler, false);
        document.addEventListener('touchmove', documentTouchMoveHandler, false);
        window.addEventListener('resize', windowResizeHandler, false);

        createParticles();

        windowResizeHandler();

        setInterval(loop, 1000 / 60);
    }
}

function createParticles() {
    particles = [];

    for (var i = 0; i < QUANTITY; i++) {
        var particle = {
            size: 1,
            position: { x: mouseX, y: mouseY },
            offset: { x: 0, y: 0 },
            shift: { x: mouseX, y: mouseY },
            speed: 0.01 + Math.random() * 0.04,
            targetSize: 1,
            fillColor: '#' + (Math.random() * 0x404040 + 0xaaaaaa | 0).toString(16),
            orbit: RADIUS * .5 + (RADIUS * .5 * Math.random())
        };

        particles.push(particle);
    }
}

function documentMouseMoveHandler(event) {
    mouseX = event.clientX - (window.innerWidth - SCREEN_WIDTH) * .5;
    mouseY = event.clientY - (window.innerHeight - SCREEN_HEIGHT) * .5;
}

function documentMouseDownHandler(event) {
    mouseIsDown = true;
}

function documentMouseUpHandler(event) {
    mouseIsDown = false;
}

function documentTouchStartHandler(event) {
    if (event.touches.length == 1) {
        event.preventDefault();

        mouseX = event.touches[0].pageX - (window.innerWidth - SCREEN_WIDTH) * .5;;
        mouseY = event.touches[0].pageY - (window.innerHeight - SCREEN_HEIGHT) * .5;
    }
}

function documentTouchMoveHandler(event) {
    if (event.touches.length == 1) {
        event.preventDefault();

        mouseX = event.touches[0].pageX - (window.innerWidth - SCREEN_WIDTH) * .5;;
        mouseY = event.touches[0].pageY - (window.innerHeight - SCREEN_HEIGHT) * .5;
    }
}

function windowResizeHandler() {
    SCREEN_WIDTH = window.innerWidth;
    SCREEN_HEIGHT = window.innerHeight;

    canvas.width = SCREEN_WIDTH;
    canvas.height = SCREEN_HEIGHT;
}

function loop() {

    if (mouseIsDown) {
        RADIUS_SCALE += (RADIUS_SCALE_MAX - RADIUS_SCALE) * (0.02);
    }
    else {
        RADIUS_SCALE -= (RADIUS_SCALE - RADIUS_SCALE_MIN) * (0.02);
    }

    RADIUS_SCALE = Math.min(RADIUS_SCALE, RADIUS_SCALE_MAX);

    context.fillStyle = 'rgba(0,0,0,0.05)';
    context.fillRect(0, 0, context.canvas.width, context.canvas.height);

    for (i = 0, len = particles.length; i < len; i++) {
        var particle = particles[i];

        var lp = { x: particle.position.x, y: particle.position.y };

        // Rotation
        particle.offset.x += particle.speed;
        particle.offset.y += particle.speed;

        // Follow mouse with some lag
        particle.shift.x += (mouseX - particle.shift.x) * (particle.speed);
        particle.shift.y += (mouseY - particle.shift.y) * (particle.speed);

        // Apply position
        particle.position.x = particle.shift.x + Math.cos(i + particle.offset.x) * (particle.orbit * RADIUS_SCALE);
        particle.position.y = particle.shift.y + Math.sin(i + particle.offset.y) * (particle.orbit * RADIUS_SCALE);

        // Limit to screen bounds
        particle.position.x = Math.max(Math.min(particle.position.x, SCREEN_WIDTH), 0);
        particle.position.y = Math.max(Math.min(particle.position.y, SCREEN_HEIGHT), 0);

        particle.size += (particle.targetSize - particle.size) * 0.05;

        if (Math.round(particle.size) == Math.round(particle.targetSize)) {
            particle.targetSize = 1 + Math.random() * 7;
        }

        context.beginPath();
        context.fillStyle = particle.fillColor;
        context.strokeStyle = particle.fillColor;
        context.lineWidth = particle.size;
        context.moveTo(lp.x, lp.y);
        context.lineTo(particle.position.x, particle.position.y);
        context.stroke();
        context.arc(particle.position.x, particle.position.y, particle.size / 2, 0, Math.PI * 2, true);
        context.fill();
    }
}

window.onload = init;
</script><a target='_blank' href='https://www.javascriptfreecode.com' style='font-size: 8pt; text-decoration: none'>JavaScript Best Codes</a>

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About @kerixa

I am Krishna Eydat. I studied Software Engineering at University of Waterloo in Canada. I lead a few tech companies. I am passionate about the way we are connected. I would like to be part of something big or be the big deal!

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effect moving move

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