首先这是HTML代码、记得Ctrl+C复制

<!DOCTYPE html>
<html lang="en" >
<head>
<meta charset="UTF-8">
<title>编程特趣</title>
<link rel="stylesheet" href="css/style.css">
</head>
<body>
<canvas id="canvas" width="1400" height="600"></canvas>
<script src="js/script.js"></script>
</body>
</html>

这是Css代码选中所有复制、Ctrl+C复制

body {
background-color: #000;
margin: 0;
overflow: hidden;
background-repeat: no-repeat;
}

这是JavaScript代码选中复制所有-很多人不知道啥是JavaScript-他是js的缩写，你记住了吗！Ctrl+C复制！

var canvas = document.getElementById("canvas");

canvas.width = window.innerWidth;
canvas.height = window.innerHeight;

// Initialize the GL context
var gl = canvas.getContext('webgl');
if(!gl){
console.error("Unable to initialize WebGL.");
}

//Time step
var dt = 0.015;
//Time
var time = 0.0;

//************** Shader sources **************

var vertexSource = `
attribute vec2 position;
void main() {
gl_Position = vec4(position, 0.0, 1.0);
}
`;

var fragmentSource = `
precision highp float;

uniform float width;
uniform float height;
vec2 resolution = vec2(width, height);

uniform float time;

#define POINT_COUNT 8

vec2 points[POINT_COUNT];
const float speed = -0.5;
const float len = 0.25;
float intensity = 0.9;
float radius = 0.015;

//https://www.shadertoy.com/view/MlKcDD
//Signed distance to a quadratic bezier
float sdBezier(vec2 pos, vec2 A, vec2 B, vec2 C){
   vec2 a = B - A;
   vec2 b = A - 2.0*B + C;
   vec2 c = a * 2.0;
   vec2 d = A - pos;

   float kk = 1.0 / dot(b,b);
   float kx = kk * dot(a,b);
   float ky = kk * (2.0*dot(a,a)+dot(d,b)) / 3.0;
   float kz = kk * dot(d,a);

float res = 0.0;

   float p = ky - kx*kx;
   float p3 = p*p*p;
   float q = kx*(2.0*kx*kx - 3.0*ky) + kz;
   float h = q*q + 4.0*p3;

   if(h >= 0.0){
       h = sqrt(h);
       vec2 x = (vec2(h, -h) - q) / 2.0;
       vec2 uv = sign(x)*pow(abs(x), vec2(1.0/3.0));
       float t = uv.x + uv.y - kx;
       t = clamp( t, 0.0, 1.0 );

       // 1 root
       vec2 qos = d + (c + b*t)*t;
       res = length(qos);
   }else{
       float z = sqrt(-p);
       float v = acos( q/(p*z*2.0) ) / 3.0;
       float m = cos(v);
       float n = sin(v)*1.732050808;
       vec3 t = vec3(m + m, -n - m, n - m) * z - kx;
       t = clamp( t, 0.0, 1.0 );

       // 3 roots
       vec2 qos = d + (c + b*t.x)*t.x;
       float dis = dot(qos,qos);

       res = dis;

       qos = d + (c + b*t.y)*t.y;
       dis = dot(qos,qos);
       res = min(res,dis);

       qos = d + (c + b*t.z)*t.z;
       dis = dot(qos,qos);
       res = min(res,dis);

       res = sqrt( res );
   }

   return res;
}

//http://mathworld.wolfram.com/HeartCurve.html
vec2 getHeartPosition(float t){
   return vec2(16.0 * sin(t) * sin(t) * sin(t),
                           -(13.0 * cos(t) - 5.0 * cos(2.0*t)
                           - 2.0 * cos(3.0*t) - cos(4.0*t)));
}

//https://www.shadertoy.com/view/3s3GDn
float getGlow(float dist, float radius, float intensity){
return pow(radius/dist, intensity);
}

float getSegment(float t, vec2 pos, float offset, float scale){
   for(int i = 0; i < POINT_COUNT; i++){
       points[i] = getHeartPosition(offset + float(i)*len + fract(speed * t) * 6.28);
   }

   vec2 c = (points[0] + points[1]) / 2.0;
   vec2 c_prev;
   float dist = 10000.0;

   for(int i = 0; i < POINT_COUNT-1; i++){
       //https://tinyurl.com/y2htbwkm
       c_prev = c;
       c = (points[i] + points[i+1]) / 2.0;
       dist = min(dist, sdBezier(pos, scale * c_prev, scale * points[i], scale * c));
   }
   return max(0.0, dist);
}

void main(){
   vec2 uv = gl_FragCoord.xy/resolution.xy;
   float widthHeightRatio = resolution.x/resolution.y;
   vec2 centre = vec2(0.5, 0.5);
   vec2 pos = centre - uv;
   pos.y /= widthHeightRatio;
   //Shift upwards to centre heart
   pos.y += 0.02;
   float scale = 0.000015 * height;

   float t = time;

   //Get first segment
   float dist = getSegment(t, pos, 0.0, scale);
   float glow = getGlow(dist, radius, intensity);

   vec3 col = vec3(0.0);

   //White core
   col += 10.0*vec3(smoothstep(0.003, 0.001, dist));
   //Pink glow
   col += glow * vec3(0.94,0.14,0.4);

   //Get second segment
   dist = getSegment(t, pos, 3.4, scale);
   glow = getGlow(dist, radius, intensity);

   //White core
   col += 10.0*vec3(smoothstep(0.003, 0.001, dist));
   //Blue glow
   col += glow * vec3(0.2,0.6,1.0);

   //Tone mapping
   col = 1.0 - exp(-col);

//Output to screen
gl_FragColor = vec4(col,1.0);
}
`;

//************** Utility functions **************

window.addEventListener('resize', onWindowResize, false);

function onWindowResize(){
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
gl.viewport(0, 0, canvas.width, canvas.height);
gl.uniform1f(widthHandle, window.innerWidth);
gl.uniform1f(heightHandle, window.innerHeight);
}

//Compile shader and combine with source
function compileShader(shaderSource, shaderType){
var shader = gl.createShader(shaderType);
gl.shaderSource(shader, shaderSource);
gl.compileShader(shader);
if(!gl.getShaderParameter(shader, gl.COMPILE_STATUS)){
throw "Shader compile failed with: " + gl.getShaderInfoLog(shader);
}
return shader;
}

//From https://codepen.io/jlfwong/pen/GqmroZ
//Utility to complain loudly if we fail to find the attribute/uniform
function getAttribLocation(program, name) {
var attributeLocation = gl.getAttribLocation(program, name);
if (attributeLocation === -1) {
throw 'Cannot find attribute ' + name + '.';
}
return attributeLocation;
}

function getUniformLocation(program, name) {
var attributeLocation = gl.getUniformLocation(program, name);
if (attributeLocation === -1) {
throw 'Cannot find uniform ' + name + '.';
}
return attributeLocation;
}

//************** Create shaders **************

//Create vertex and fragment shaders
var vertexShader = compileShader(vertexSource, gl.VERTEX_SHADER);
var fragmentShader = compileShader(fragmentSource, gl.FRAGMENT_SHADER);

//Create shader programs
var program = gl.createProgram();
gl.attachShader(program, vertexShader);
gl.attachShader(program, fragmentShader);
gl.linkProgram(program);

gl.useProgram(program);

//Set up rectangle covering entire canvas
var vertexData = new Float32Array([
-1.0, 1.0,    // top left
-1.0, -1.0,    // bottom left
1.0, 1.0,    // top right
1.0, -1.0,    // bottom right
]);

//Create vertex buffer
var vertexDataBuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, vertexDataBuffer);
gl.bufferData(gl.ARRAY_BUFFER, vertexData, gl.STATIC_DRAW);

// Layout of our data in the vertex buffer
var positionHandle = getAttribLocation(program, 'position');

gl.enableVertexAttribArray(positionHandle);
gl.vertexAttribPointer(positionHandle,
2,                // position is a vec2 (2 values per component)
gl.FLOAT, // each component is a float
false,        // don't normalize values
2 * 4,        // two 4 byte float components per vertex (32 bit float is 4 bytes)
0                // how many bytes inside the buffer to start from
);

//Set uniform handle
var timeHandle = getUniformLocation(program, 'time');
var widthHandle = getUniformLocation(program, 'width');
var heightHandle = getUniformLocation(program, 'height');

gl.uniform1f(widthHandle, window.innerWidth);
gl.uniform1f(heightHandle, window.innerHeight);

function draw(){
//Update time
time += dt;

//Send uniforms to program
gl.uniform1f(timeHandle, time);
//Draw a triangle strip connecting vertices 0-4
gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);

requestAnimationFrame(draw);
}

draw();