(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 />Loading...
16 сентября 2023 г.
To check the type of an operand in JavaScript, you can use the typeof operator. It returns a string representing the type of the value.
The operand is placed after the typeof operator. It can be either a primitive value or an object.
1console.log(typeof 45); // "number"23console.log(typeof 'some string'); // "string"45console.log(typeof true); // "boolean"67console.log(typeof {one: "one", two: "two"}) // "object"89// And others