FRONT-DEV-INFO
ПостыРесурсы
(function(){<br />
let canvas = document.createElement('canvas'),<br />  
ctx = canvas.getContext('2d'),<br />             
w = canvas.width = innerWidth,<br />
h = canvas.height = innerHeight,<br />
particles = [],<br />
properties = {<br />
bgColor : 'rgba(17, 17, 19, 1)',<br />
particleColor : 'rgba(255, 40, 40, 1)',<br />
particleRadius : 3,<br />
particleCount : 60,<br />
particleMaxVelocity : 0.5,<br />
lineLength : 150,<br />
particleLife : 6,<br />
};<br />
<br />
document.querySelector('body').appendChild(canvas);<br />
<br />
window.onresize = function() {<br />
w = canvas.width = innerWidth;<br />
h = canvas.height = innerHeight;<br />
}<br />
<br />
class Particle {<br />
constructor() {<br />
this.x = Math.random()*w;<br />

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Коротко о null и undefined